Tootfinder

Confined Circumstellar Material as a Dust Formation Site in Type II Supernovae
Yuki Takei, Kunihito Ioka, Masaru Shibata
https://arxiv.org/abs/2507.22763 https://

Confined Circumstellar Material as a Dust Formation Site in Type II Supernovae
We propose a model for dust formation in Type II supernovae (SNe) interacting with confined circumstellar material (CSM), motivated by recent time-domain surveys that have revealed a substantial fraction of SN progenitors to be surrounded by CSM ejected shortly before core-collapse. We simulate the pre-SN mass eruption and the resulting confined CSM using the open-source code CHIPS, and follow the subsequent evolution of the SN ejecta and its interaction with the CSM. We show that a cold dense …

Efficient single-atom transfer from an optical conveyor belt to a tightly confined optical tweezer
Lei Xu, Ling-Xiao Wang, Guang-Jie Chen, Zhu-Bo Wang, Xin-Biao Xu, Guang-Can Guo, Chang-Ling Zou, Guo-Yong Xiang
https://arxiv.org/abs/2507.21456 https://arxiv.org/pdf/2507.21456 https://arxiv.org/html/2507.21456
arXiv:2507.21456v1 Announce Type: new
Abstract: Efficient loading of single atoms into tightly confined traps is crucial for advancing quantum information processing and exploring atom-photon interactions. However, directly loading atoms from a magneto-optical trap (MOT) into static tweezers in cavity-based systems and hybrid atom-photon interfaces remains a challenge. Here, we demonstrate atom loading in a tightly confined optical tweezer 0.6mm away from MOT by an optical conveyor belt. By employing real-time feedback control of the atom number in the overlapping region between the conveyor belt and the tweezer, we enhance a single-atom loading probability to 77.6%. Our technique offers a versatile solution for deterministic single-atom loading in various experimental settings and paves the way for diverse applications based on hybrid photonic-atom structures.
toXiv_bot_toot

Axially confined binary quantum droplets: ground states and central vortices
Srivatsa B. Prasad, Thomas P. Billam, Nick G. Parker
https://arxiv.org/abs/2507.21805 https://

Axially confined binary quantum droplets: ground states and central vortices
Ultracold miscible mixtures of bosonic gases have been observed to form quantum droplet states stabilized by beyond-mean-field quantum fluctuations. Here we study the properties of the droplets when subjected to harmonic trapping in one dimension, using a combination of numerical, variational and analytical approaches. We map out the phase diagram between bound droplets and the unbound gas state and the form of the ground states. We additionally consider how the droplet solutions are modified b…

Series A, Episode 01 - The Way Back
VARON: He works in the Outer Worlds most of the time. He's in Security.
BLAKE: He's a murderer.
VARON: Then he'll come to trial like everyone else in this cover-up.
BLAKE: And what about me?
https://blake.torpidity.net/m/101/317

Blakes7Bot | Search
Companion site to the Blakes7Bot Twitter, Mastodon, and Bluesky accounts. Automated lines of Blakes 7 dialog. Includes a script search facility.

An em algorithm for quantum Boltzmann machines
Takeshi Kimura, Kohtaro Kato, Masahito Hayashi
https://arxiv.org/abs/2507.21569 https://arxiv.org/pdf/2507.2…

An em algorithm for quantum Boltzmann machines
We develop a quantum version of the em algorithm for training quantum Boltzmann machines. The em algorithm is an information-geometric extension of the well-known expectation-maximization (EM) algorithm, offering a structured alternative to gradient-based methods with potential advantages in stability and convergence. We implement the algorithm on a semi-quantum restricted Boltzmann machine, where quantum effects are confined to the hidden layer. This structure enables analytical update rules w…

This https://arxiv.org/abs/2505.15799 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCY_…

The Agentic Economy
Generative AI has transformed human-computer interaction by enabling natural language interfaces and the emergence of autonomous agents capable of acting on users' behalf. While early applications have improved individual productivity, these gains have largely been confined to predefined tasks within existing workflows. We argue that the more profound economic impact lies in reducing communication frictions between consumers and businesses. This shift could reorganize markets, redistribute powe…

Confined acoustic phonons in CsPbI3 nanocrystals explored by resonant Raman scattering on excitons
Carolin Harkort, Ina V. Kalitukha, Nataliia E. Kopteva, Mikhail O. Nestoklon, Serguei V. Goupalov, Lucien Saviot, Dennis Kudlacik, Dmitri R. Yakovlev, Elena V. Kolobkova, Maria S. Kuznetsova, Manfred Bayer
https://arxiv.org/abs/250…

Confined acoustic phonons in CsPbI3 nanocrystals explored by resonant Raman scattering on excitons
Optical properties of the lead halide perovskites nanocrystals are controlled by confined excitons and rich spectrum of confined acoustic and optical phonons. We study experimentally and theoretically the exciton-phonon interaction in CsPbI3 perovskite nanocrystals embedded in a glass matrix. Energies of phonon modes allowed by selection rules are detected by resonant Raman scattering for nanocrystals with sizes of 4-13 nm, covering exciton energies of 1.72-2.25 eV. While optical phonon energie…

Synchronized Circular Motion of Optically Confined Marangoni Microswimmers
Sabera M. Borno, Robin Khisa, Israt H. Zarin, Md Hasan Mahmud, Nicholas D. Brubaker, Ryan C. Hayward, Nabila Tanjeem
https://arxiv.org/abs/2507.20517

Synchronized Circular Motion of Optically Confined Marangoni Microswimmers
Understanding the collective actuation of microscopic structures driven by external fields can lead to the development of next-generation autonomous machines. With this goal in mind, we investigated light-induced collective motion of thermocapillary microswimmers at the air-water interface. We found that Marangoni forces, which lead to long-ranged repulsive interparticle interactions, can cause microswimmers to synchronize their circular motion in a collective chase mode that resembles predator…

Local Stability and Region of Attraction Analysis for Neural Network Feedback Systems under Positivity Constraints
Hamidreza Montazeri Hedesh, Moh Kamalul Wafi, Milad Siami
https://arxiv.org/abs/2505.22889

Local Stability and Region of Attraction Analysis for Neural Network Feedback Systems under Positivity Constraints
We study the local stability of nonlinear systems in the Lur'e form with static nonlinear feedback realized by feedforward neural networks (FFNNs). By leveraging positivity system constraints, we employ a localized variant of the Aizerman conjecture, which provides sufficient conditions for exponential stability of trajectories confined to a compact set. Using this foundation, we develop two distinct methods for estimating the Region of Attraction (ROA): (i) a less conservative Lyapunov-based a…

Series A, Episode 01 - The Way Back
VARON: He works in the Outer Worlds most of the time. He's in Security.
BLAKE: He's a murderer.
VARON: Then he'll come to trial like everyone else in this cover-up.
BLAKE: And what about me?
https://blake.torpidity.net/m/101/317

Blakes7Bot | Search
Companion site to the Blakes7Bot Twitter, Mastodon, and Bluesky accounts. Automated lines of Blakes 7 dialog. Includes a script search facility.

Scientists say your “mind” isn’t confined to your brain, or even your body
http://qz.com/866352/scientists-say-your-mind-isnt-confined-to-your-brain-or-even-your-bod…

Scientists say your “mind” isn’t confined to your brain, or even your body
You might wonder, at some point today, what’s going on in another person’s mind. You may compliment someone’s great mind, or say they are out of their mind. You may even try to expand or free your own mind.

This https://arxiv.org/abs/2403.13627 has been replaced.
initial toot: https://mastoxiv.page/@a…

A Straightforward Gradient-Based Approach for High-Tc Superconductor Design: Leveraging Domain Knowledge via Adaptive Constraints
Materials design aims to discover novel compounds with desired properties. However, prevailing strategies face critical trade-offs. Conventional element-substitution approaches readily and adaptively incorporate various domain knowledge but remain confined to a narrow search space. In contrast, deep generative models efficiently explore vast compositional landscapes, yet they struggle to flexibly integrate domain knowledge. To address these trade-offs, we propose a gradient-based material desig…

Quantum dynamics in confined pseudo-harmonic oscillator in a time-dependent moving
Akash Halder, Amlan K. Roy, Debraj Nath
https://arxiv.org/abs/2506.21280

Quantum dynamics in confined pseudo-harmonic oscillator in a time-dependent moving
In this work, we present analytical solution of Schrödinger equation of confined pseudoharmonic potential in presence of a moving boundary condition, for an arbitrary angular momentum state. It turns out that an important quantity to probe the problem is internuclear distance ratio, which depends on the solution of Ermakov equation. The minimum value of time-dependent (TD) Heisenberg uncertainty product always remains greater than that of the minimum uncertainty product h/2. The TD average ene…

Replaced article(s) found for cond-mat.soft. https://arxiv.org/list/cond-mat.soft/new
[1/1]:
- From Champagne to Confined Polymer:Natural and Artificial Bubble Nucleation
Carlos Arauz-Moreno, Keyvan Piroird, Elise Lorenceau

The Non-Abelian Casimir Effect for Plates, Symmetrical Tube and Box on the Lattice
B. A. Ngwenya, A. K. Rothkopf, W. A. Horowitz
https://arxiv.org/abs/2507.21333 https://…

The Non-Abelian Casimir Effect for Plates, Symmetrical Tube and Box on the Lattice
We present non-perturbative results of the Casimir potential in non-abelian SU(3) gauge theory in (2+1)D and (3+1)D in the confined and deconfined phase. For the first time, geometries beyond parallel plates in (3+1)D are explored and we show that the Casimir effect for the symmetrical tube and symmetrical box is attractive. The Casimir potential for the tube differs from the massless non-interacting scalar field theory prediction, where a repulsive Casimir potential is expected. Unlike the par…

This https://arxiv.org/abs/2503.17189 has been replaced.
initial toot: https://mastoxiv.page/@a…

Bayesian optimisation of poloidal field coil positions in tokamaks
The tokamak is a world-leading concept for producing sustainable energy via magnetically-confined nuclear fusion. Identifying where to position the magnets within a tokamak, specifically the poloidal field (PF) coils, is a design problem which requires balancing a number of competing economic, physical, and engineering objectives and constraints. In this paper, we show that multi-objective Bayesian optimisation (BO), an iterative optimisation technique utilising probabilistic machine learning m…

Excitation of vortex core gyration in nanopillars through driven Floquet magnons
Gauthier Philippe, Joo-Von Kim
https://arxiv.org/abs/2507.19865 https://ar…

Excitation of vortex core gyration in nanopillars through driven Floquet magnons
The dynamics of vortex states in confined geometries like thin-film disks are characterized by a sub-GHz gyration, representing the damped oscillatory motion of the vortex core about the disk center. It has recently been shown that interactions between the core and azimuthal spin waves, lying in the GHz range and driven by magnetic fields, can result in steady-state core gyration. The gyration in turn provides a time-periodic modulation for the spin waves, resulting in the emergence of Floquet …

Taking Language Embedded 3D Gaussian Splatting into the Wild
Yuze Wang, Yue Qi
https://arxiv.org/abs/2507.19830 https://arxiv.org/pdf/2507.19830

Taking Language Embedded 3D Gaussian Splatting into the Wild
Recent advances in leveraging large-scale Internet photo collections for 3D reconstruction have enabled immersive virtual exploration of landmarks and historic sites worldwide. However, little attention has been given to the immersive understanding of architectural styles and structural knowledge, which remains largely confined to browsing static text-image pairs. Therefore, can we draw inspiration from 3D in-the-wild reconstruction techniques and use unconstrained photo collections to create a…

Condensate-mediated dimerization of impurities in atomic BECs
Hoshu Hiyane, Thom\'as Fogarty, Jose Carlos Pelayo, Thomas Busch
https://arxiv.org/abs/2507.21972 https://

Condensate-mediated dimerization of impurities in atomic BECs
We show that strongly correlated impurities confined in an optical lattice can form localized, molecule-like dimer states in the presence of a Bose-Einstein condensate (BEC). By systematically studying the effect of the lattice potential on this mixture, we reveal the two roles of the condensate in assisting the formation of dimerized impurities: mediating the attractive interaction among impurities and rescaling the lattice potential of impurities. At strong coupling between the impurities and…

Efficient single-atom transfer from an optical conveyor belt to a tightly confined optical tweezer
Lei Xu, Ling-Xiao Wang, Guang-Jie Chen, Zhu-Bo Wang, Xin-Biao Xu, Guang-Can Guo, Chang-Ling Zou, Guo-Yong Xiang
https://arxiv.org/abs/2507.21456

On the Impossibility of Obtaining Time-Independent, Three-Dimensional, Spherically-Symmetric Densities of Confined Systems of Relativistically Moving Constituents
Gerald A. Miller
https://arxiv.org/abs/2507.14388

On the Impossibility of Obtaining Time-Independent, Three-Dimensional, Spherically-Symmetric Densities of Confined Systems of Relativistically Moving Constituents
The quantum mechanical definition of probability, the uncertainty principle and Poincare invariance provide strong basic restrictions on the ability to define spatial densities associated with form factors describing the properties of confined systems of relativistically moving constituents. Despite this, many papers ignore one or more of these restrictions. Here I show how to obtain time-independent, two-dimensional densities that are consistent with the stated restrictions. This is done using…

Two videos have surfaced shedding light on what is happening behind closed doors at a New York federal building -- where people are being confined after being seized by officers on their way out of immigration court on the 12th floor, with the footage offering a rare look inside a controversial and closely guarded space that is part of Donald Trump’s anti-immigration crackdown.
The filming, shared by the New York Immigration Coalition(NYIC), captures one of several rooms at 26 Federal …

Confined and deconfined chaos in classical spin systems
Hyeongjin Kim, Robin Sch\"afer, David M. Long, Anatoli Polkovnikov, Anushya Chandran
https://arxiv.org/abs/2507.07168 …

Confined and deconfined chaos in classical spin systems
Weakly perturbed integrable many-body systems are typically chaotic and thermal at late times. However, there are distinct relationships between the timescales for thermalization and chaos. The typical relationship is confined chaos: when trajectories are still confined to regions in phase space with constant conserved quantities (actions), the conjugate angle variables are already unstable. Confined chaos thus far precedes thermalization. In a different relationship, which we term deconfined c…

GIIFT: Graph-guided Inductive Image-free Multimodal Machine Translation
Jiafeng Xiong, Yuting Zhao
https://arxiv.org/abs/2507.18562 https://arxiv.org/pdf/2…

GIIFT: Graph-guided Inductive Image-free Multimodal Machine Translation
Multimodal Machine Translation (MMT) has demonstrated the significant help of visual information in machine translation. However, existing MMT methods face challenges in leveraging the modality gap by enforcing rigid visual-linguistic alignment whilst being confined to inference within their trained multimodal domains. In this work, we construct novel multimodal scene graphs to preserve and integrate modality-specific information and introduce GIIFT, a two-stage Graph-guided Inductive Image-Fre…

Exploring Fermionic Dark Matter Admixed Neutron Stars in the Light of Astrophysical Observations
Payaswinee Arvikar (Dharampeth M. P. Deo Memorial Science College, Nagpur, India, Department of Physics, BITS-Pilani Hyderabad Campus, Hyderabad, India), Sakshi Gautam (Department of Physics, BITS-Pilani Hyderabad Campus, Hyderabad, India, Department of Physics, Panjab University, Chandigarh, India), Anagh Venneti (Department of Physics, BITS-Pilani Hyderabad Campus, Hyderabad, India), Sarm…

Exploring Fermionic Dark Matter Admixed Neutron Stars in the Light of Astrophysical Observations
We studied the properties of dark matter admixed-neutron stars (DMANS), considering fermionic dark matter (DM) that interacts gravitationally with hadronic matter (HM). Using relativistic mean-field equations of state (EoSs) for both components, we solved the two-fluid Tolman Oppenheimer Volkoff (TOV) equations to determine neutron star (NS) properties assuming that DM is confined within the stellar core. For hadronic matter, we employed realistic EoSs derived from low energy nuclear physics ex…

Superconducting flux concentrator coils for levitation of particles in the Meissner state
Robert Smit, Martijn Janse, Eli van der Bent, Thijmen de Jong, Kier Heeck, Jaimy Plugge, Tjerk Oosterkamp, Bas Hensen
https://arxiv.org/abs/2507.20795

Superconducting flux concentrator coils for levitation of particles in the Meissner state
Magnetic levitation of superconductors is a promising platform to study quantum mechanics in the large-mass limit. One major limitation is the weak trapping potential, which results in low vibrational eigenfrequencies and increased susceptibility to low-frequency noise. While generating strong magnetic fields is relatively straightforward, creating a tightly confined harmonic potential - essentially achieving a large magnetic field gradient - remains a significant challenge. In this work, we de…

Temporally-Constrained Video Reasoning Segmentation and Automated Benchmark Construction
Yiqing Shen, Chenjia Li, Chenxiao Fan, Mathias Unberath
https://arxiv.org/abs/2507.16718

Temporally-Constrained Video Reasoning Segmentation and Automated Benchmark Construction
Conventional approaches to video segmentation are confined to predefined object categories and cannot identify out-of-vocabulary objects, let alone objects that are not identified explicitly but only referred to implicitly in complex text queries. This shortcoming limits the utility for video segmentation in complex and variable scenarios, where a closed set of object categories is difficult to define and where users may not know the exact object category that will appear in the video. Such sce…

#Blakes7 Series B, Episode 08 - Hostage
VILA: Why should they want to kill us?
BLAKE: Because they enjoy it.
AVON: All we can hope for is that it's quick.
[Main room of the tower. Molok is twisting Inga's shoulder. She screams.]
ht…

Enhanced beam transport via space charge mitigation in a multistage accelerator for fusion plasma diagnostics
M. Nishiura, K. Nakamura, K. Ueda, A. Shimizu, H. Takubo, M. Kanda, T. Ido, M. Okamura
https://arxiv.org/abs/2507.20948

Enhanced beam transport via space charge mitigation in a multistage accelerator for fusion plasma diagnostics
Efficient transport of high-current negative ion beams is critical for accurate plasma potential diagnostics using heavy-ion beam probe (HIBP) systems in magnetically confined fusion plasmas. However, strong space-charge effects often degrade transport efficiency, particularly for heavy ions such as Au-. In this study, we demonstrate a substantial improvement in beam transport by introducing an electrostatic lens effect through optimized voltage allocation in a multistage acceleration system. N…

Kirstin Downey: Streetfront Exhibit Brings Internment Camp History Downtown (CIVIL BEAT, 20 Jun 2025)
https://www.civilbeat.org/2025/06/kirstin-downey-streetfront-exhibit-brings-internment-camp-history-downtown/

Kirstin Downey: Streetfront Exhibit Brings Internment Camp History Downtown
About 400 local residents were among the people confined at the camp during World War II.

Electric-field control of two-dimensional ferromagnetic properties by chiral ionic gating
Hideki Matsuoka, Amaki Moriyama, Tomohiro Hori, Yoshinori Tokura, Yoshihiro Iwasa, Shu Seki, Masayuki Suda, Naoya Kanazawa
https://arxiv.org/abs/2507.20723

Electric-field control of two-dimensional ferromagnetic properties by chiral ionic gating
Chiral molecular systems offer unique pathways to control spin and magnetism beyond conventional symmetry operations. Here, we demonstrate that chiral ionic liquids enable electric-field modulation of two-dimensional (2D) ferromagnetism in FeSi(111) thin films via electric double-layer transistor (EDLT) gating. FeSi hosts chemically-stable, surface-confined ferromagnetism without bulk moments, making the interfacial spins highly responsive to chiral-ion adsorption. Using both achiral and chiral…

Can Movable Antenna-enabled Micro-Mobility Replace UAV-enabled Macro-Mobility? A Physical Layer Security Perspective
Kaixuan Li, Kan Yu, Dingyou Ma, Yujia Zhao, Xiaowu Liu, Qixun Zhang, ZHiyong Feng
https://arxiv.org/abs/2506.19456

Can Movable Antenna-enabled Micro-Mobility Replace UAV-enabled Macro-Mobility? A Physical Layer Security Perspective
This paper investigates the potential of movable antenna (MA)-enabled micro-mobility to replace UAV-enabled macro-mobility for enhancing physical layer security (PLS) in air-to-ground communications. While UAV trajectory optimization offers high flexibility and Line-of-Sight (LoS) advantages, it suffers from significant energy consumption, latency, and complex trajectory optimization. Conversely, MA technology provides fine-grained spatial reconfiguration (antenna positioning within a confined …

MFAz: Historical Access Based Multi-Factor Authorization
Eyasu Getahun Chekole, Howard Halim, Jianying Zhou
https://arxiv.org/abs/2507.16060 https://

MFAz: Historical Access Based Multi-Factor Authorization
Unauthorized access remains one of the critical security challenges in the realm of cybersecurity. With the increasing sophistication of attack techniques, the threat of unauthorized access is no longer confined to the conventional ones, such as exploiting weak access control policies. Instead, advanced exploitation strategies, such as session hijacking-based attacks, are becoming increasingly prevalent, posing serious security concerns. Session hijacking enables attackers to take over an alrea…

An Open-source Capping Machine Suitable for Confined Spaces
Francisco Munguia-Galeano, Louis Longley, Satheeshkumar Veeramani, Zhengxue Zhou, Rob Clowes, Hatem Fakhruldeen, Andrew I. Cooper
https://arxiv.org/abs/2506.03743

An Open-source Capping Machine Suitable for Confined Spaces
In the context of self-driving laboratories (SDLs), ensuring automated and error-free capping is crucial, as it is a ubiquitous step in sample preparation. Automated capping in SDLs can occur in both large and small workspaces (e.g., inside a fume hood). However, most commercial capping machines are designed primarily for large spaces and are often too bulky for confined environments. Moreover, many commercial products are closed-source, which can make their integration into fully autonomous wo…

Magnetically controlled double-twist director configuration of lyotropic chromonic liquid crystals in cylinders: Energetics, topological defects, and instability
Junghoon Lee, Joonwoo Jeong
https://arxiv.org/abs/2507.20565

Magnetically controlled double-twist director configuration of lyotropic chromonic liquid crystals in cylinders: Energetics, topological defects, and instability
We study experimentally how the double-twist (DT) configuration of cylindrically confined lyotropic chromonic liquid crystals (LCLCs) responds to axial magnetic fields. Our director field model unveils the energetics behind the magnetic field-induced transition in the twist profile of the DT configuration. Additionally, we catalog three different types of topological defects -- residing between the DT domains of opposite handedness -- before and after the field application, and propose a new di…

Devon farm footage prompts calls to ban restrictive pens for pregnant pigs https://www.theguardian.com/environment/2025/jun/13/calls-to-ban-restrictive-pens-for-pregnant-pigs-after-analysis-of-footage-fro…

Green function and singularities in Stokes flow confined by cylindrical walls
Giuseppe Procopio
https://arxiv.org/abs/2507.06720 https://

Green function and singularities in Stokes flow confined by cylindrical walls
In this article, the Green function for the Stokes flow in the interior, exterior, and annular regions bounded by cylindrical walls is derived as a function of the pole position and expressed invariantly both at the field and pole points. Specifically, the Green function is obtained using a cylindrical harmonic expansion of the Stokes flow within the bitensorial formulation. This formulation allows us to obtain higher-order singularities within the same domains, such as the confined Couplet and…

Massless monopole-string-domain wall fermions and polyhedral vacuum fermions
Minoru Eto, Yuito Suzuki
https://arxiv.org/abs/2506.16765 https://

Massless monopole-string-domain wall fermions and polyhedral vacuum fermions
Fermion zero modes of Bogomol'nyi-Prasad-Sommerfield monopole-string-domain wall composites in three spatial dimensions are studied. We analytically solve the Dirac equation and prove the existence of one fermion zero mode. Depending on mass parameters of bosons/fermions in the model, the zero modes are localized either on the monopoles, strings or domain walls, which we call monopole-string-domain wall fermions. We also show that in special cases, the zero modes can be confined within a finite…

Equatorial light bending around a Hairy Kiselev Black Hole
Shrishti Kukreti, Shubham Kala, Hemwati Nandan, Faizuddin Ahmed, Saswati Roy
https://arxiv.org/abs/2507.15298

Equatorial light bending around a Hairy Kiselev Black Hole
We investigate the deflection angle of light rays confined to the equatorial plane of a Hairy Kiselev black hole. The analysis includes a thorough study of the horizon structure and critical parameters, leading to an analytic expression for the deflection angle in terms of elliptic integrals. Our results confirm that the deflection angle decreases with increasing impact parameter, in agreement with classical predictions of gravitational lensing. The influence of the scalar field, characterized …

First-Passage Observables of $d$-dimensional Confined Jump Processes
J\'er\'emie Klinger, Olivier B\'enichou, Rapha\"el Voituriez
https://arxiv.org/abs/2506.12581

First-Passage Observables of $d$-dimensional Confined Jump Processes
First-passage observables (FPO) are central to understanding stochastic processes in confined domains, with applications spanning chemical reaction kinetics, foraging behavior, and molecular transport. While extensive analytical results exist for continuous processes, discrete jump processes -- crucial for describing empirically observed dynamics -- remain largely unexplored in this context. This paper presents a comprehensive framework to systematically evaluate FPO for $d$-dimensional confine…

Interfacial instability of confined 3D active droplets
Bennett C. Sessa, Federico Cao, Robert A. Pelcovits, Thomas R. Powers, Guillaume Duclos
https://arxiv.org/abs/2506.17532

Interfacial instability of confined 3D active droplets
Instabilities of fluid-fluid interfaces are ubiquitous in passive soft matter. Adding activity to the interface or either fluid can dramatically change the stability of the interface. Using experiment and theory, we investigate the interfacial instability of a deformable 3D active nematic liquid crystal droplet in the isotropic phase surrounded by a passive fluid and confined between two parallel plates. Spontaneous active flows drive the growth of undulations along the active/passive interface…

Graph Neural Network Surrogates for Contacting Deformable Bodies with Necessary and Sufficient Contact Detection
Vijay K. Dubey (The University of Texas at Austin), Collin E. Haese (The University of Texas at Austin), Osman G\"ultekin (The University of Texas at Austin), David Dalton (University of Glasgow), Manuel K. Rausch (The University of Texas at Austin), Jan N. Fuhg (The University of Texas at Austin)

Graph Neural Network Surrogates for Contacting Deformable Bodies with Necessary and Sufficient Contact Detection
Surrogate models for the rapid inference of nonlinear boundary value problems in mechanics are helpful in a broad range of engineering applications. However, effective surrogate modeling of applications involving the contact of deformable bodies, especially in the context of varying geometries, is still an open issue. In particular, existing methods are confined to rigid body contact or, at best, contact between rigid and soft objects with well-defined contact planes. Furthermore, they employ c…

Influence of Interlayer Stacking on Optical Behavior in WSe$_{2}$/MoS$_{2}$ van der Waals Heterostructures
Widad Louafi, Karim Rezouali, Daniele Varsano, Maurizia Palummo, Maurits W. Haverkort, Samir Lounis
https://arxiv.org/abs/2506.18607

Influence of Interlayer Stacking on Optical Behavior in WSe$_{2}$/MoS$_{2}$ van der Waals Heterostructures
We investigate the impact of crystal alignment on excitonic behavior in WSe$_{2}$/MoS$_{2}$ van der Waals heterostructures by comparing eclipsed (AA) and staggered (AB) stacking configurations. Our first-principles and symmetry-based analysis reveal that interlayer stacking symmetry plays a central role in determining the nature of electron-hole pairs. We uncover a rich variety of excitonic states, including spatially confined two-dimensional (2D) excitons, delocalized three-dimensional (3D) ex…

An ignition criterion for inertial fusion boosted by microturbulence
Henry Fetsch, Nathaniel J. Fisch
https://arxiv.org/abs/2507.18917 https://arxiv.org/pd…

An ignition criterion for inertial fusion boosted by microturbulence
Turbulence enhances fusion reactivity, enabling ignition at lower temperature. A modified Lawson-like ignition criterion is derived for inertially confined plasmas harboring turbulent kinetic energy. Remarkably, if small-scale turbulence is driven in the hot spot while avoiding mixing at the boundary, less energy is required to ignite a target. The optimal length scale for hot-spot turbulence is quantified, typically lying in the micron range.

Large deviations at the edge for 1D gases and tridiagonal random matrices at high temperature
Charlie Dworaczek Guera, Ronan Memin
https://arxiv.org/abs/2507.14008

Large deviations at the edge for 1D gases and tridiagonal random matrices at high temperature
We consider a model for a gas of $N$ confined particles subject to a two-body repulsive interaction, namely the one-dimensional log or Riesz gas. We are interested in the so-called \textit{high temperature} regime, \textit{ie} where the inverse temperature $β_N$ scales as $Nβ_N\rightarrow2P>0$. We establish, in the log case, a large deviation (LD) principle and moderate deviations estimates for the largest particle $x_\mathrm{max}$ when appropriately rescaled . Our result is an extension of […

Generating and Weaving Topological Event Wavepackets in Photonic Spacetime Crystals with Fully Energy-Momentum Gapped
Liang Zhang, Zirui Zhao, Qiaofei Pan, Chenhao Pan, Qingqing Cheng, Yiming Pan
https://arxiv.org/abs/2507.15309

Generating and Weaving Topological Event Wavepackets in Photonic Spacetime Crystals with Fully Energy-Momentum Gapped
We propose a novel type of topological excitation topological event wavepackets (TEWs) emerging in photonic spacetime crystals (STCs) with spacetime modulated dielectric constants. These TEWs exhibit strong spatiotemporal localization and are topologically protected by a fully opened energy momentum (ωk) gap, within which conventional steady states are absent. We further demonstrate that TEWs are spectrally confined within the ωk-gap, providing a combined measurement for probing the emergence…

Re-examining Super-Nyquist Frequencies of 68 $\delta$ Scuti Stars Utilizing the Kepler Long Cadence Photometry
Zilu Yang, Jianning Fu, Xuan Wang, Yanqi Mo, Weikai Zong
https://arxiv.org/abs/2507.18128 …

Re-examining Super-Nyquist Frequencies of 68 $δ$ Scuti Stars Utilizing the Kepler Long Cadence Photometry
The high-precision and long-duration photometry provided by the $Kepler$ mission has greatly advanced frequency analyses of a large number of pulsating stars, a fundamental step in asteroseismology. For $δ$ Scuti stars, analyses are typically confined to frequencies below the Nyquist frequency. However, signals above this limit can be reflected into the sub-Nyquist range, especially in long-cadence data, where they may overlap with genuine pulsation modes and lead to misinterpretation. To addr…

This https://arxiv.org/abs/2412.07250 has been replaced.
initial toot: https://mastoxiv.page/@…

Control, competition and coexistence of effective magnetic orders by interactions in Bose-Einstein condensates with high-Q cavities
Ultracold atomic systems confined in optical cavities have been demonstrated as a laboratory for the control of quantum matter properties and analog quantum simulation. Often neglected, but soon amenable to manipulation in a new generation of experiments, we show that atomic many-body interactions allow additional control in the cavity driven self-organization of effective spinor Bose-Einstein condensates (BEC). We theoretically show that a rich landscape of magnetic ordering configurations eme…

Quantum Transport Protected by Acceleration From Nonadiabaticity and Dissipation
Arnab Chakrabarti, Biswarup Ash, Igor Mazets, Xi Chen, Gershon Kurizki
https://arxiv.org/abs/2506.21462

Quantum Transport Protected by Acceleration From Nonadiabaticity and Dissipation
We put forth a hitherto unexplored control strategy that enables high-fidelity fast transport of an unstable quantum wavepacket even in the presence of bath-induced dissipation. The wavepacket, which is confined within any shallow (anharmonic) potential trap is steered in acceleration, so as to maximize the transfer fidelity. This strategy can generally optimize any non-Markovian bath-dressed continuous-variable system dynamics. It can simultaneously cope with wavepacket leakage via non-adiabat…

Sonnet 107 - CVII
Not mine own fears, nor the prophetic soul
Of the wide world dreaming on things to come,
Can yet the lease of my true love control,
Supposed as forfeit to a confined doom.
The mortal moon hath her eclipse endured,
And the sad augurs mock their own presage;
Incertainties now crown themselves assured,
And peace proclaims olives of endless age.
Now with the drops of this most balmy time,
My love looks fresh, and Death…

Low-Latency Event-Based Velocimetry for Quadrotor Control in a Narrow Pipe
Leonard Bauersfeld, Davide Scaramuzza
https://arxiv.org/abs/2507.15444 https://

Low-Latency Event-Based Velocimetry for Quadrotor Control in a Narrow Pipe
Autonomous quadrotor flight in confined spaces such as pipes and tunnels presents significant challenges due to unsteady, self-induced aerodynamic disturbances. Very recent advances have enabled flight in such conditions, but they either rely on constant motion through the pipe to mitigate airflow recirculation effects or suffer from limited stability during hovering. In this work, we present the first closed-loop control system for quadrotors for hovering in narrow pipes that leverages real-ti…

Derivation of the time-dependent Hartree equations for strongly interacting dense fermionic systems
Duc Viet Hoang, David Mitrouskas, Peter Pickl
https://arxiv.org/abs/2507.12390 …

Derivation of the time-dependent Hartree equations for strongly interacting dense fermionic systems
The time-dependent Hartree and Hartree-Fock equations provide effective mean-field descriptions for the dynamics of large fermionic systems and play a fundamental role in many areas of physics. In this work, we rigorously derive the time-dependent Hartree equations as the large-$N$ limit of the microscopic Schrödinger dynamics of $N$ fermions confined to a volume of order one and interacting via strong pair potentials. A central step in our analysis is the implementation of time-dependent gaug…

A Generalized Framework for Approximate Co-Sufficient Sampling
Jie Xie, Dongming Huang
https://arxiv.org/abs/2506.12334 https://arxiv…

A Generalized Framework for Approximate Co-Sufficient Sampling
Approximate co-sufficient sampling (aCSS) offers a principled route to hypothesis testing when null distributions are unknown, yet current implementations are confined to maximum likelihood estimators with smooth or linear regularization and provide little theoretical insight into power. We present a generalized framework that widens the scope of the aCSS method to embrace nonlinear regularization, such as group lasso and nonconvex penalties, as well as robust and nonparametric estimators. More…

Real-World Deployment of a Lane Change Prediction Architecture Based on Knowledge Graph Embeddings and Bayesian Inference
M. Manzour, Catherine M. Elias, Omar M. Shehata, R. Izquierdo, M. A. Sotelo
https://arxiv.org/abs/2506.11925

Real-World Deployment of a Lane Change Prediction Architecture Based on Knowledge Graph Embeddings and Bayesian Inference
Research on lane change prediction has gained a lot of momentum in the last couple of years. However, most research is confined to simulation or results obtained from datasets, leaving a gap between algorithmic advances and on-road deployment. This work closes that gap by demonstrating, on real hardware, a lane-change prediction system based on Knowledge Graph Embeddings (KGEs) and Bayesian inference. Moreover, the ego-vehicle employs a longitudinal braking action to ensure the safety of both i…

Dispersion of active particles in oscillatory Poiseuille flow
Vhaskar Chakraborty, Pankaj Mishra, Mingfeng Qiu, Zhiwei Peng
https://arxiv.org/abs/2507.17081 https://

Dispersion of active particles in oscillatory Poiseuille flow
Active particles exhibit complex transport dynamics in flows through confined geometries such as channels or pores. In this work, we employ a generalized Taylor dispersion (GTD) theory to study the long-time dispersion behavior of active Brownian particles (ABPs) in an oscillatory Poiseuille flow within a planar channel. We quantify the time-averaged longitudinal dispersion coefficient as a function of the flow speed, flow oscillation frequency, and particle activity. In the weak-activity limit…

Elastic bilayer membranes under confinement -- Existence, regularity, and rigidity
Matthias R\"oger, Fabian Rupp
https://arxiv.org/abs/2506.14520 http…

Elastic bilayer membranes under confinement -- Existence, regularity, and rigidity
Motivated by applications to cell biology, we study the constrained minimization of the Helfrich energy among closed surfaces confined to a container. We show existence of minimizers in the class of bubble trees of spherical weak branched immersions and derive the Euler--Lagrange equations which involve a measure-valued Lagrange multiplier that is concentrated on the coincidence set with the container boundary. We provide a careful analysis of this elliptic system and prove optimal regularity f…

Model of dark current in silicon-based barrier impurity band infrared detector devices
Mengyang Cui, Chengduo Hu, Qing Li, Hongxing Qi
https://arxiv.org/abs/2507.14923

Model of dark current in silicon-based barrier impurity band infrared detector devices
Dark current in silicon-based blocked impurity band (BIB) infrared detectors has long been a critical limitation on device performance. This work proposes a chiral-phonon-assisted spin current model at interfaces to explain the parabolic-like dark current behavior observed at low bias voltages. Concurrently, the spatially-confined charge transport theory is employed to elucidate the dark current generation mechanism across the entire operational voltage range.

Probing interfacial water via color-center-enabled spin magnetometry
Kang Xu, Kapila Elkaduwe, Rohma Khan, Sang-Jun Lee, Dennis Nordlund, Gustavo E. L\'opez, Abraham Wolcott, Daniela Pagliero, Nicolas Giovambattista, Carlos A. Meriles
https://arxiv.org/abs/2507.03148

Probing interfacial water via color-center-enabled spin magnetometry
Understanding the behavior of confined water at liquid-solid interfaces is central to numerous physical, chemical, and biological processes, yet remains experimentally challenging. Here, we utilize shallow nitrogen-vacancy (NV) centers in diamond to investigate the nanoscale dynamics of interfacial water confined between the diamond surface and an overlying fluorinated oil droplet. Using NV-based nuclear magnetic resonance protocols selectively sensitive to 1H and 19F, we independently track wa…

Abelian-Higgs vortices in the oscillating axion background
Naoya Kitajima, Shota Nakagawa
https://arxiv.org/abs/2507.16720 https://ar…

Abelian-Higgs vortices in the oscillating axion background
We study the dynamics of Abelian-Higgs vortices in the background of a coherently oscillating axion field. We show that the electric field is induced in the magnetic core of the vortex due to the axion-photon conversion. Moreover, because the electromagnetic field is confined in the vortex and excluded from the superconducting bulk regions due to the Meissner effect, the vortex tube can be regarded as a cylindrical cavity, and our numerical analysis shows that the resonant cavity mode (TM010 mo…

Ragged Blocks: Rendering Structured Text with Style
Sam Cohen, Ravi Chugh
https://arxiv.org/abs/2507.06460 https://arxiv.org/pdf/2507…

Ragged Blocks: Rendering Structured Text with Style
Whether it be source code in a programming language, prose in natural language, or otherwise, text is highly structured. Currently, text visualizations are confined either to _flat, line-based_ decorations, which can convey only limited information about textual structure, or _nested boxes_, which convey structure but often destroy the typographic layout of the underlying text. We hypothesize that the lack of rich styling options limits the kinds of information that are displayed alongside text…

Unambiguous GeV gamma-rays from molecular clouds illuminated by particles diffusing from the adjacent supernova remnant G335.2 0.1 that is confined in an expanding bubble
Chen Huang, Xiao Zhang, Yang Chen, Qian-Qian Zhang, Wen-Juan Zhong, Xin Zhou
https://arxiv.org/abs/2507.08709

Unambiguous GeV gamma-rays from molecular clouds illuminated by particles diffusing from the adjacent supernova remnant G335.2+0.1 that is confined in an expanding bubble
We report the detection of GeV gamma-ray emission likely associated with supernova remnant (SNR) G335.2+0.1 and the finding of a molecular cloud ($\sim20$--$30^\prime$ in angular size) that is very likely in physical contact with the SNR and responsible for the gamma-ray emission. Using the 16.8 yr Fermi-LAT data, an extended emission, with a significance of 13.5 $σ$ and a radius 0.24° in 0.2--500 GeV in the uniform-disk model, was found to the adjacent east of the SNR. With archival Mopra CO…

This https://arxiv.org/abs/2411.08988 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Single-File Diffusion of Active Brownian Particles
Single-file diffusion (SFD) is a key mechanism underlying transport phenomena in confined physical and biological systems. In a typical SFD process, microscopic particles are restricted to moving in a narrow channel where they cannot pass one another, resulting in constrained motion and anomalous long-time diffusion. In this study, we use Brownian dynamics simulations and analytical theory to investigate the SFD of athermal active Brownian particles (ABPs), a minimal model of active colloids. B…

Confined-deconfined interface tension and latent heat in $\SU{N}$ gauge theory
Tobias Rindlisbacher, Kari Rummukainen, Ahmed Salami
https://arxiv.org/abs/2506.15509

Confined-deconfined interface tension and latent heat in $\SU{N}$ gauge theory
We present high-precision lattice results for the confined-deconfined interface tension and the latent heat of pure $SU(N)$ gauge theories up to $N=10$ and investigate their asymptotic $N$-dependency. For both quantities we observe the leading $N^2$ behaviour and subleading corrections, with the result for the interface tension $σ/T_c^3 = 0.0182(7) N^2 - 0.194(15)$ and for the latent heat $L/T_c^4 = 0.360(6) N^2 - 1.88(17)$. We use the \emph{mixed phase ensemble} method - where the system is c…

From stripes to hexagons: strain-induced 2D Pb phases confined between graphene and SiC
Markus Gruschwitz, Sergii Sologub, Chitran Ghosal, Zamin Mamiyev, Yuran Niu, Alexei Zakharov, Christoph Tegenkamp
https://arxiv.org/abs/2506.10791

From stripes to hexagons: strain-induced 2D Pb phases confined between graphene and SiC
The intercalation of metals beneath graphene offers a powerful route to stabilizing and protecting novel two-dimensional (2D) phases. The epitaxial growth of Pb monolayers on SiC(0001), combined with the relatively large spacing of the suspended graphene, makes this system particularly distinctive. Using low-energy electron diffraction (LEED) and various microscopy techniques -- including scanning electron microscopy (SEM), scanning tunneling microscopy (STM), and low-energy electron microscopy…

Jordanian spin chains for twisted strings in $AdS_5\times S^5$
Sibylle Driezen, Adrien Molines
https://arxiv.org/abs/2507.13911 https://

Jordanian spin chains for twisted strings in $AdS_5\times S^5$
We study the integrable spin chain formulation of Jordanian deformations of the $AdS_5\times S^5$ superstring, realised via Drinfel'd twists. Among these models, we first identify a unique supergravity deformation confined to an $SL(2,\mathbb{R})$ sector and with constant dilaton. We then develop a general framework for closed Drinfel'd twisted spin chains and construct an explicit map to undeformed models with twisted-boundary conditions. Applied to the non compact $\mathrm{XXX}_{-1/2}$ spin c…

Internal dynamics and dielectric screening of confined multiexciton states
Josep Planelles, Juan I. Climente, Jose L. Movilla
https://arxiv.org/abs/2507.11087

Internal dynamics and dielectric screening of confined multiexciton states
Recent experimental and computational studies suggest that biexcitons (BX) confined in large CsPbBr$_3$ nanocrystals experience reduced dielectric screening as compared to excitons (X) and trions (X$^*$). Here we provide a physical rationale to explain such a behavior. A characteristic frequency is introduced, which describes the internal dynamics of an exciton within the excitonic complex. By means of effective mass--variational Quantum Monte Carlo simulations, we show that, in large nanocryst…

VGR: Visual Grounded Reasoning
Jiacong Wang, Zijiang Kang, Haochen Wang, Haiyong Jiang, Jiawen Li, Bohong Wu, Ya Wang, Jiao Ran, Xiao Liang, Chao Feng, Jun Xiao
https://arxiv.org/abs/2506.11991

VGR: Visual Grounded Reasoning
In the field of multimodal chain-of-thought (CoT) reasoning, existing approaches predominantly rely on reasoning on pure language space, which inherently suffers from language bias and is largely confined to math or science domains. This narrow focus limits their ability to handle complex visual reasoning tasks that demand comprehensive understanding of image details. To address these limitations, this paper introduces VGR, a novel reasoning multimodal large language model (MLLM) with enhanced …

Understanding Plasma Turbulence Through Exact Coherent Structures
Sidney D. V. Williams, Matthew N. Gudorf, Dmitri M. Orlov
https://arxiv.org/abs/2505.19363

Understanding Plasma Turbulence Through Exact Coherent Structures
Plasma turbulence is a key challenge in understanding transport phenomena in magnetically confined plasmas. This work presents a novel approach using periodic orbit theory to analyze plasma turbulence, identifying fundamental structures that underpin chaotic motion. By applying numerical optimization techniques to the Kuramoto-Sivashinsky equation - a reduced model for drift-wave-driven trapped particle turbulence - we extract coherent spacetime patterns that serve as building blocks of turbule…

Controlling Topological Defects in Polar Fluids via Reinforcement Learning
Abhinav Singh, Petros Koumoutsakos
https://arxiv.org/abs/2507.19298 https://arxi…

Controlling Topological Defects in Polar Fluids via Reinforcement Learning
Topological defects in active polar fluids exhibit complex dynamics driven by internally generated stresses, reflecting the deep interplay between topology, flow, and non-equilibrium hydrodynamics. Feedback control offers a powerful means to guide such systems, enabling transitions between dynamic states. We investigated closed-loop steering of integer-charged defects in a confined active fluid by modulating the spatial profile of activity. Using a continuum hydrodynamic model, we show that loc…

Series A, Episode 03 - Cygnus Alpha
BLAKE: [Whispers] Vila. [Pause, then louder] Vila. [Pause] Gan. [Pause] Gan.
GAN: [Moves to bars] Blake.
BLAKE: What is it? What's the matter with everybody?
GAN: How did you get here?
https://blake.torpidity.net/m/103/377 …

Blakes7Bot | Search
Companion site to the Blakes7Bot Twitter, Mastodon, and Bluesky accounts. Automated lines of Blakes 7 dialog. Includes a script search facility.

Directional Flow of Confined Polaritons in CrSBr
Pratap Chandra Adak, Sichao Yu, Jaime Abad-Arredondo, Biswajit Datta, Andy Cruz, Sorah Fischer, Kseniia Mosina, Zden\v{e}k Sofer, Antonio I. Fern\'andez-Dom\'inguez, Francisco J. Garc\'ia-Vidal, Vinod M. Menon
https://arxiv.org/abs/2507.04367

Directional Flow of Confined Polaritons in CrSBr
Nanoscale control of energy transport is a central challenge in modern photonics. Utilization of exciton-polaritons hybrid light-matter quasiparticles is one viable approach, but it typically demands complex device engineering to enable directional transport. Here, we demonstrate that the van der Waals magnet CrSBr offers an inherent avenue for steering polariton transport leveraging a unique combination of intrinsic optical anisotropy, high refractive index, and excitons dressed by photons. Th…

Enhanced dispersion of active microswimmers in confined flows
Marc Lagoin (LOMA), Juliette Lacherez (LOMA), Guirec de Tournemire (LOMA), Ahmad Badr (LOMA), Yacine Amarouchene (LOMA), Antoine Allard (LOMA, UB), Thomas Salez (LOMA)
https://arxiv.org/abs/2507.08369

Enhanced dispersion of active microswimmers in confined flows
In the presence of a laminar shear flow, the diffusion of passive colloidal particles is enhanced in the direction parallel to the flow. This classical phenomenon is known as Taylor-Aris dispersion. Besides, microorganisms, such as active microswimmers, exhibit an effective diffusive behavior at long times. Combining the two ingredients above, a natural question then emerges on how the effective diffusion of active microswimmers is altered in shear flows - a widespread situation in natural envi…

Spatial Regionalization: A Hybrid Quantum Computing Approach
Yunhan Chang, Amr Magdy, Federico M. Spedalieri, Ibrahim Sabek
https://arxiv.org/abs/2506.18799

Spatial Regionalization: A Hybrid Quantum Computing Approach
Quantum computing has shown significant potential to address complex optimization problems; however, its application remains confined to specific problems at limited scales. Spatial regionalization remains largely unexplored in quantum computing due to its complexity and large number of variables. In this paper, we introduce the first hybrid quantum-classical method to spatial regionalization by decomposing the problem into manageable subproblems, leveraging the strengths of both classical and …

Suppression of capillary instability in a confined quantum liquid filament
Francesco Ancilotto, Michele Modugno, Chiara Fort
https://arxiv.org/abs/2507.11223

Suppression of capillary instability in a confined quantum liquid filament
Quantum Bose-Bose mixtures with strong attraction can form self-bound, liquid-like droplets stabilized by quantum fluctuations. Despite equilibrium densities much lower than those of classical liquids, these droplets exhibit finite surface tension and liquid-like behaviors. Recent experiments have demonstrated Rayleigh-Plateau instability in elongated droplets confined in an optical waveguide. Here we consider the case of an infinite filament and extend the theoretical description to include tr…

A Taylor swimming sheet under a finite Brinkman layer
Tasawar Iqbal, Catherine Penington, Christian Thomas, Lyndon Koens
https://arxiv.org/abs/2507.16125 https://

A Taylor swimming sheet under a finite Brinkman layer
An asymptotic approach is employed to study the swimming speed of a two-dimensional Taylor swimming sheet beneath a Brinkman layer of finite thickness. This configuration is representative of a swimmer confined within a porous non-Newtonian boundary and could model microscopic filter feeders like choanoflagellates and sponges or the mucociliary escalator in the lungs. When ignoring the effects of jump stress and porosity, the swimming speed of the sheet decreases as the thickness and lower boun…

Lorentz violation signatures in the low-energy sector of Ho\v{r}ava gravity from black hole shadow observations
Wentao Liu, Hongxia Huang, Di Wu, Jieci Wang
https://arxiv.org/abs/2506.13504

Lorentz violation signatures in the low-energy sector of Hořava gravity from black hole shadow observations
In this paper, we use the Hořava gravity model and EHT observations of supermassive black holes (BHs) to investigate signatures of Lorentz violation in real astrophysical environments. The Lorentz violation in the rotating Hořava BH spacetime are confined to the strong gravitational field region, being induced by the BH's rotation. Due to the non-separability of the photon motion equations in this spacetime, we employed a numerical backward ray-tracing method to generate shadow images for var…

Casper: Inferring Diverse Intents for Assistive Teleoperation with Vision Language Models
Huihan Liu, Rutav Shah, Shuijing Liu, Jack Pittenger, Mingyo Seo, Yuchen Cui, Yonatan Bisk, Roberto Mart\'in-Mart\'in, Yuke Zhu
https://arxiv.org/abs/2506.14727

Casper: Inferring Diverse Intents for Assistive Teleoperation with Vision Language Models
Assistive teleoperation, where control is shared between a human and a robot, enables efficient and intuitive human-robot collaboration in diverse and unstructured environments. A central challenge in real-world assistive teleoperation is for the robot to infer a wide range of human intentions from user control inputs and to assist users with correct actions. Existing methods are either confined to simple, predefined scenarios or restricted to task-specific data distributions at training, limit…

Nonlocal current-driven heat flow in ideal plasmas
Nicholas Mitchell, David Chapman, Grigory Kagan
https://arxiv.org/abs/2507.18430 https://arxiv.org/pdf/2…

Nonlocal current-driven heat flow in ideal plasmas
Electron heat flux is an important and often dominant mechanism of energy transport in a variety of collisional plasmas in a confined fusion or astrophysical context. While nonlocal conductive heat transport, driven by strong temperature gradients, has been investigated extensively in previous literature, nonlocal regimes of the current-driven heat flow and friction have not received the same attention. In this work, a first-principles reduced kinetic method (RKM) is applied to study nonlocal e…

Harnessing higher-dimensional fluctuations in an information engine
Antonio Patr\'on Castro, John Bechhoefer, David A. Sivak
https://arxiv.org/abs/2507.15503

Harnessing higher-dimensional fluctuations in an information engine
We study the optimal performance of an information engine consisting of an overdamped Brownian bead confined in a controllable, $d$-dimensional harmonic trap and additionally subjected to gravity. The trap's center is updated dynamically via a feedback protocol designed such that no external work is done by the trap on the bead, while maximizing the extraction of gravitational potential energy and achieving directed motion. We show that performance strikingly improves when thermal fluctuations …

Compressibility of Confined Fluids from Volume Fluctuations
Jason Ogbebor, Santiago A. Flores Roman, Geordy Jomon, Gennady Y. Gor
https://arxiv.org/abs/2507.07020

Compressibility of Confined Fluids from Volume Fluctuations
When fluids are confined in nanopores, many of their properties deviate from bulk. These include bulk modulus, or compressibility, which determines the mechanical properties of fluid-saturated porous solids. Such properties are of importance for exploration and recovery of coal-bed methane and shale gas. We developed a new molecular simulation method for calculating compressibility of confined fluids, and applied it to methane in carbon nanopores. The method is based on volume fluctuations in t…

Exploring Entanglement Entropy for a Particle on a Torus with constant Metric and constant $U(1)$-Gauge Field
Helmuth Huffel, Gerald Kelnhofer
https://arxiv.org/abs/2506.11292

Exploring Entanglement Entropy for a Particle on a Torus with constant Metric and constant $U(1)$-Gauge Field
In this paper, we focus on the entanglement entropy associated with a particle confined to a torus with constant metric and $θ$-terms related to a constant external $U(1)$-gauge field. Through this investigation, we aim to elucidate the interplay between geometric properties, topological terms, and entanglement entropy. Remarkably, we find that the presence of non-vanishing entanglement entropy is closely tied to fixing the metric. This insight highlights the significant influence of quantum e…

Uncertainty Aware Mapping for Vision-Based Underwater Robots
Abhimanyu Bhowmik, Mohit Singh, Madhushree Sannigrahi, Martin Ludvigsen, Kostas Alexis
https://arxiv.org/abs/2507.10991

Uncertainty Aware Mapping for Vision-Based Underwater Robots
Vision-based underwater robots can be useful in inspecting and exploring confined spaces where traditional sensors and preplanned paths cannot be followed. Sensor noise and situational change can cause significant uncertainty in environmental representation. Thus, this paper explores how to represent mapping inconsistency in vision-based sensing and incorporate depth estimation confidence into the mapping framework. The scene depth and the confidence are estimated using the RAFT-Stereo model an…

Replaced article(s) found for cond-mat.quant-gas. https://arxiv.org/list/cond-mat.quant-gas/new
[1/1]:
- Dynamical probe of the pseudo Jahn-Teller effect in one-dimensional confined fermions
Andr\'e Becker, Georgios M. Koutentakis, Peter Schmelcher
…

Near-field optical mode engineering-enabled freeform nonlocal metasurfaces
Zhongjun Jiang, Tianxiang Dai, Shuwei Guo, Soyaib Sohag, Yixuan Shao, Chenkai Mao, Andrea Al\`u, Jonathan A. Fan, You Zhou
https://arxiv.org/abs/2506.15495

Near-field optical mode engineering-enabled freeform nonlocal metasurfaces
Nanophotonic technologies inherently rely on tailoring light-matter interactions through the excitation and interference of deeply confined optical resonances. However, existing concepts in optical mode engineering remain heuristic and are challenging to extend towards complex and multi-functional resonant phenomena. Here, we introduce an inverse design framework that optimizes near-field distributions, ideally suited to tailor Mie-type modes within dielectric nanophotonic structures, and we de…

On the temperature of an active nematic
Jay Armas, Akash Jain, Ruben Lier
https://arxiv.org/abs/2506.20602 https://arxiv.org/pdf/2506…

On the temperature of an active nematic
We employ a novel hydrodynamic framework for active matter coupled to an environment to study the local temperature of an active nematic, assuming proximity to thermal equilibrium. We show that, due to the mechanosensitivity of fuel consumption, linearized temperature correlations in a homogeneous active nematic steady state remain unaffected by activity. However, we demonstrate that local shearing and twisting cause a confined active nematic undergoing a spontaneous flow transition to develop …

Structure and dynamics of finite three-dimensional Yukawa clusters in complex plasmas : Newtonian versus Langevin Dynamics
Hirakjyoti Sarma, Nilakshi Das
https://arxiv.org/abs/2506.18820

Structure and dynamics of finite three-dimensional Yukawa clusters in complex plasmas : Newtonian versus Langevin Dynamics
The structure and dynamics of a harmonically confined three dimensional finite dust cluster are investigated via both Langevin Dynamics (LD) and frictionless Molecular Dynamics (fMD) simulation. The static structure of the system is analyzed through the Radial Distribution Function, Center-two-particle correlation function(C2P) and angular correlation function. The intra-shell angular correlation, Radial Distribution Function and C2P remains largely unaffected by the dynamics employed. However,…

SAIL: Faster-than-Demonstration Execution of Imitation Learning Policies
Nadun Ranawaka Arachchige, Zhenyang Chen, Wonsuhk Jung, Woo Chul Shin, Rohan Bansal, Pierre Barroso, Yu Hang He, Yingyang Celine Lin, Benjamin Joffe, Shreyas Kousik, Danfei Xu
https://arxiv.org/abs/2506.11948

SAIL: Faster-than-Demonstration Execution of Imitation Learning Policies
Offline Imitation Learning (IL) methods such as Behavior Cloning are effective at acquiring complex robotic manipulation skills. However, existing IL-trained policies are confined to executing the task at the same speed as shown in demonstration data. This limits the task throughput of a robotic system, a critical requirement for applications such as industrial automation. In this paper, we introduce and formalize the novel problem of enabling faster-than-demonstration execution of visuomotor p…

An entangled photon source for the telecom C-band based on a semiconductor-confined spin
Petros Laccotripes, Junyang Huang, Ginny Shooter, Andrea Barbiero, Matthew S. Winnel, David A. Ritchie, Andrew J. Shields, Tina Muller, R. Mark Stevenson
https://arxiv.org/abs/2507.01648

An entangled photon source for the telecom C-band based on a semiconductor-confined spin
Multiphoton entangled states are a key resource for quantum networks and measurement-based quantum computation. Scalable protocols for generating such states using solid-state spin-photon interfaces have recently emerged, but practical implementations have so far relied on emitters operating at short wavelengths, incompatible with low-loss fibre transmission. Here, we take a key step towards the generation of telecom wavelength multi-qubit entangled states using an InAs/InP quantum dot. After e…

Moir\'e-Polaritons in a Dark Bose-Einstein Condensate
Moroni Santiago-Garc\'ia, Shunashi G. Castillo-L\'opez, David A. Ruiz-Tijerina, Arturo Camacho-Guardian
https://arxiv.org/abs/2506.15083

Moiré-Polaritons in a Dark Bose-Einstein Condensate
Quantum mixtures of moiré excitons have arisen as a platform for realizing novel phases of light and matter. Here, we study moiré polaritons coupled to a Bose-Einstein condensate of dark-state excitons confined to a moiré superlattice. We develop a variational approach to analyze the optical response of the system and demonstrate that strong exciton-exciton interactions significantly modify the character of moiré polaritons, leading to sizable energy shifts of the avoided crossing between t…

Exciton-polaritons in a monolayer semiconductor coupled to van der Waals dielectric nanoantennas on a metallic mirror
Yadong Wang, Charalambos Louca, Sam Randerson, Xuerong Hu, Panaiot G. Zotev, Oscar Palma Chaundler, Paul Bouteyre, Casey K. Cheung, Roman Gorbachev, Yue Wang, Alexander I. Tartakovskii
https://arxiv.org/abs/2506.…

Exciton-polaritons in a monolayer semiconductor coupled to van der Waals dielectric nanoantennas on a metallic mirror
Polaritons in nanophotonic structures have attracted long-standing interest owing to their fundamental importance and potential for applications in nonlinear and quantum optics. Nanoantennas (NAs) made from high refractive index dielectrics offer a suitable platform for polariton physics thanks to the strongly confined optical Mie resonances and low optical losses in contrast to metallic NAs. However, Mie modes are mainly confined within the NA, making inefficient their coupling with excitons i…

First-passage and extreme value statistics for overdamped Brownian motion in a linear potential
Feng Huang, Hanshuang Chen
https://arxiv.org/abs/2506.13112

First-passage and extreme value statistics for overdamped Brownian motion in a linear potential
We investigate the first-passage properties and extreme-value statistics of an overdamped Brownian particle confined by an external linear potential $V(x)=μ|x-x_0|$, where $μ>0$ is the strength of the potential and $x_0>0$ is the position of the lowest point of the potential, which coincides with the starting position of the particle. The Brownian motion terminates whenever the particle passes through the origin at a random time $t_f$. Our study reveals that the mean first-passage t…

Shaping Boundaries to Control and Transport Topological Defects in Colloidal Nematic Liquid Crystals
Gerardo Campos-Villalobos, Andr\'e F. V. Matias, Ethan I. L. Jull, Lisa Tran, Marjolein Dijkstra
https://arxiv.org/abs/2506.18664

Shaping Boundaries to Control and Transport Topological Defects in Colloidal Nematic Liquid Crystals
Anisotropic rod-like particles form liquid crystalline phases with varying degrees of orientational and translational order. When confined geometrically, these phases can give rise to topological defects, which can be selected and controlled by tuning how the rods align near boundaries, known as anchoring. While anchoring in molecular liquid crystals can be controlled through surface functionalization, this approach is not easily applicable to microscale colloidal systems, which have so far bee…

State Change via One-Dimensional Scattering in Quantum Mechanics
Olivia Pomerenk, Charles S. Peskin
https://arxiv.org/abs/2506.24090 https://

State Change via One-Dimensional Scattering in Quantum Mechanics
We consider a pair of particles that interact in a one-dimensional setting via a delta-function potential. One of the particles is confined to a one-dimensional box, and the other particle is free. The free particle is incident from the left with specified energy, and it may cause changes in state of the confined particle before flying away to the left or to the right. We present a non-perturbative formulation and computational scheme that determines the probability of any such outcome, as a fu…

3D Steering and Localization in Pipes and Burrows using an Externally Steered Soft Growing Robot
Yimeng Qin, Jared Grinberg, William Heap, Allison M. Okamura
https://arxiv.org/abs/2507.07225

3D Steering and Localization in Pipes and Burrows using an Externally Steered Soft Growing Robot
Navigation and inspection in confined environments, such as tunnels and pipes, pose significant challenges for existing robots due to limitations in maneuverability and adaptability to varying geometries. Vine robots, which are soft growing continuum robots that extend their length through soft material eversion at their tip, offer unique advantages due to their ability to navigate tight spaces, adapt to complex paths, and minimize friction. However, existing vine robot designs struggle with na…

Replaced article(s) found for cond-mat.quant-gas. https://arxiv.org/list/cond-mat.quant-gas/new
[1/1]:
- Hybridization of the amplitude mode in a confined fermionic superfluid
Cabrera, Henke, Broers, Skulte, Collado, Biss, Mathey, Moritz

Symmetry-breaking motility of an active hinge in a crowded channel
Leonardo Garibaldi Rigon, Yongjoo Baek
https://arxiv.org/abs/2506.16722 https://

Symmetry-breaking motility of an active hinge in a crowded channel
A recent experiment [Son et al., Soft Matter, 2024, 20,2777-2788] showed that self-propelled particles confined within a circular boundary filled with granular medium spontaneously form a motile cluster that stays on the boundary. This cluster exhibits persistent (counter)clockwise motion driven by symmetry breaking, which arises from a positive feedback between the asymmetry of the cluster and those of the surrounding granular medium. To investigate this symmetry-breaking mechanism in broader …

Design of an innovative robotic surgical instrument for circular stapling
Paul Tucan (CESTER), Nadim Al Hajjar (UMF), Calin Vaida (CESTER), Alexandru Pusca (CESTER), Tiberiu Antal (CESTER), Corina Radu (UMF), Daniel Jucan (CESTER), Adrian Pisla (CESTER), Damien Chablat (LS2N, LS2N - \'equipe RoMas), Doina Pisla (CESTER)
https://

Design of an innovative robotic surgical instrument for circular stapling
Esophageal cancer remains a highly aggressive malignancy with low survival rates, requiring advanced surgical interventions like esophagectomy. Traditional manual techniques, including circular staplers, face challenges such as limited precision, prolonged recovery times, and complications like leaks and tissue misalignment. This paper presents a novel robotic circular stapler designed to enhance the dexterity in confined spaces, improve tissue alignment, and reduce post-operative risks. Integr…

Paramagnetism in spherically confined charged active matter
Bal\'azs N\'emeth, Ronojoy Adhikari
https://arxiv.org/abs/2506.03064 https://

Paramagnetism in spherically confined charged active matter
The celebrated theorem of Bohr and van Leeuwen guarantees that a classical charged system cannot have a magnetization in thermal equilibrium. Quantum mechanically, however, a diamagnetic response is obtained. In contrast, we show here that a classical charged active system, consisting of a motile particle confined to the surface of a sphere, has a nonzero magnetization and a paramagnetic response. We numerically sample Langevin trajectories of this system and compare with limiting analytical so…

Unified Symmetry Breaking in Confined Electrolytes: Charge, Chemical Potential, and the Nonlinear Capacitance of Hollow Nanoparticles
Marcelo Lozada-Cassou
https://arxiv.org/abs/2506.05644

Unified Symmetry Breaking in Confined Electrolytes: Charge, Chemical Potential, and the Nonlinear Capacitance of Hollow Nanoparticles
We study the nonlinear electrostatic response of electrolyte-filled, hollow charged nanoparticles, modeled as nanocapacitors with finite wall thickness and curved geometry.

Transport of soft matter in complex and confined environments
Joshua D Mcgraw (IPGG)
https://arxiv.org/abs/2506.05884 https://arxiv.o…

Transport of soft matter in complex and confined environments
Brownian motion provides a bedrock for the understanding of soft condensed matter and, therefore, of the physical description of the microscopic biological world. Inspired by this domain, and combining softness with hydrodynamic energy inputs, new physical modes of nanoscale organization and transport may now be accessible.