Tootfinder

Cowboys release LB Leighton Vander Esch, WR Michael Gallup https://www.yardbarker.com/nfl/articles/cowboys_release_lb_leighton_vander_esch_wr_michael_gallup/s1_17049_40116211

Cowboys release LB Leighton Vander Esch, WR Michael Gallup
The Dallas Cowboys released linebacker Leighton Vander Esch and receiver Michael Gallup on Friday. The Cowboys said Vander Esch was released with a failed physical designation. According to reports, the move frees up $2.14 million in salary cap space. Vander Esch missed the final 12 games of the 2023 season with a neck injury and has long had problems with his neck. The Cowboys said Gallup will be listed as a post-June 1 cut. The move reportedly saves Dallas $9.5 million. Vander Esch, a first-r…

GeoSACS: Geometric Shared Autonomy via Canal Surfaces
Shalutha Rajapakshe, Atharva Dastenavar, Michael Hagenow, Jean-Marc Odobez, Emmanuel Senft
https://arxiv.org/abs/2404.09584 <…

GeoSACS: Geometric Shared Autonomy via Canal Surfaces
We introduce GeoSACS, a geometric framework for shared autonomy (SA). In variable environments, SA methods can be used to combine robotic capabilities with real-time human input in a way that offloads the physical task from the human. To remain intuitive, it can be helpful to simplify requirements for human input (i.e., reduce the dimensionality), which create challenges for to map low-dimensional human inputs to the higher dimensional control space of robots without requiring large amounts of …

This https://arxiv.org/abs/2404.07056 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Quantum Isotropic Universe in RQM Analogy: the Cosmological Horizon
We investigate the quantum dynamics of the isotropic Universe in the presence of a free massless scalar field, playing the role of a physical clock. The Hilbert space is constructed via a direct analogy between the Wheeler-DeWitt equation in the minisuperspace and a relativistic scalar one in physical space. In particular, we show how the introduction of a "turning point" in the Universe evolution allows to overcome an intrinsic ambiguity in representing the expanding and collapsing Universe. I…

Series A, Episode 08 - Duel
BLAKE: How long have we got?
SINOFAR: There is no limit - only your physical endurance.
https://blake.torpidity.net/s/108/291 📺 B7BA

💥 Understanding Physical Breakdowns in Virtual Reality
#vr #technology

Understanding Physical Breakdowns in Virtual Reality
Virtual Reality (VR) moves away from well-controlled laboratory environments into public and personal spaces. As users are visually disconnected from the physical environment, interacting in an uncontrolled space frequently leads to collisions and raises safety concerns. In my thesis, I investigate this phenomenon which I define as the physical breakdown in VR. The goal is to understand the reasons for physical breakdowns, provide solutions, and explore future mechanisms that could perpetuate s…

Posted 4th post about my infra rebuild - this about my physical office, desktops, laptops, NAS etc
https://www.devco.net/posts/2024/04/11/lab-infra-rebuild-4/

This https://arxiv.org/abs/2307.10369 has been replaced.
initial toot: https://mastoxiv.page/@a…

Enumeration and representation theory of spin space groups
Those fundamental physical properties, such as phase transitions, Weyl fermions, and spin excitation, in all magnetic ordered materials, were ultimately believed to rely on the symmetry theory of magnetic space groups. Recently, it has come to light that a more comprehensive group, known as the spin space group (SSG), which combines separate spin and spatial operations, is necessary to fully characterize the geometry and underlying properties of magnetic ordered materials. However, the basic th…

Harnessing Physical Climate Risk Scoring Across CRE Investment Management Verticals
#RealEstate #MoodysCRE #MA_CRESolutions

This https://arxiv.org/abs/2403.07846 has been replaced.
initial toot: https://mastoxiv.page/@a…

Antiferromagnetic magnons on a Möbius strip: topology-induced symmetry breaking
A Möbius strip comprising of two antiferromagnetically coupled spin chains showcase exotic magnon excitations with non-trivial physical behavior, which is solely attributed to the real-space boundary condition even in the absence of local curvature effects. Counterintuitively, magnons on a Möbius strip feature linear polarization of the Néel vector devoid of chirality even when the spin Hamiltonian preserves local rotational symmetry around the anisotropic easy axis. These linearly-polarized…

This https://arxiv.org/abs/2309.02545 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCR_…

Mayhem: Targeted Corruption of Register and Stack Variables
In the past decade, many vulnerabilities were discovered in microarchitectures which yielded attack vectors and motivated the study of countermeasures. Further, architectural and physical imperfections in DRAMs led to the discovery of Rowhammer attacks which give an adversary power to introduce bit flips in a victim's memory space. Numerous studies analyzed Rowhammer and proposed techniques to prevent it altogether or to mitigate its effects. In this work, we push the boundary and show how Ro…

User is seeking advice on birthday gift ideas below $150 for a friend who's finishing a cybersecurity master's and is interested in penetration testing and physical security devices. Friend recently bought a lock pick kit and flipper zero. https://reddit.com/r/cybersecurity/comments/1b8gjve/

Realization of nodal ring semimetal in pressurized black phosphorus
Kazuto Akiba, Yuichi Akahama, Masashi Tokunaga, Tatsuo C. Kobayashi
https://arxiv.org/abs/2404.10192

Realization of nodal ring semimetal in pressurized black phosphorus
Topological semimetals are intriguing targets for exploring unconventional physical properties of massless fermions. Among them, nodal line or nodal ring semimetals have attracted attention for their unique one-dimensional band contact in momentum space and resulting nontrivial quantum phenomena. By field angular resolved magnetotransport measurements and theoretical calculations, we show that pressurized black phosphorus (BP) is an ideal nodal ring semimetal with weak spin-orbit coupling, whic…

This https://arxiv.org/abs/2306.10771 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Oxidation, Reduction and Semi-Classical Limit for Quantum Matrix Geometries
Matrix configurations define noncommutative spaces endowed with extra structure including a generalized Laplace operator, and hence a metric structure. Made dynamical via matrix models, they describe rich physical systems including noncommutative gauge theory and emergent gravity. Refining the construction in [1], we construct a semi-classical limit through an immersed submanifold of complex projective space based on quasi-coherent states. We observe the phenomenon of oxidation, where the resul…

Brewers deal with Gary Sšnchez is back on after physical revealed issue: Sources
#MLB #Baseball #KenRosenthal

Analytical Heterogeneous Die-to-Die 3D Placement with Macros
Yuxuan Zhao, Peiyu Liao, Siting Liu, Jiaxi Jiang, Yibo Lin, Bei Yu
https://arxiv.org/abs/2403.09070

Analytical Heterogeneous Die-to-Die 3D Placement with Macros
This paper presents an innovative approach to 3D mixed-size placement in heterogeneous face-to-face (F2F) bonded 3D ICs. We propose an analytical framework that utilizes a dedicated density model and a bistratal wirelength model, effectively handling macros and standard cells in a 3D solution space. A novel 3D preconditioner is developed to resolve the topological and physical gap between macros and standard cells. Additionally, we propose a mixed-integer linear programming (MILP) formulation f…

Probing phase transitions with correlations in configuration space: a Monte Carlo study on lattice models
Wen-Yu Su, Yu-Jing Liu, Nvsen Ma, Chen Cheng
https://arxiv.org/abs/2404.07087

Probing phase transitions with correlations in configuration space: a Monte Carlo study on lattice models
While phases and phase transitions are mostly characterized by order parameters or physical quantities in real space, we propose that the correlation in Hilbert space is closely connected to phase transitions. Specifically, this correlation is quantified by the 1-norm distance between configurations, and the distribution of distances can be obtained from a small fraction of configurations in the exponentially large Hilbert space, with the help of importance sampling procedures of the Monte Carl…

Quiescent or dusty? Unveiling the nature of extremely red galaxies at $z>3$
L. Barrufet, P. Oesch, R. Marques-Chaves, K. Arellano-Cordova, J. F. W. Baggen, A. C. Carnall, F. Cullen, J. S. Dunlop, R. Gottumukkala, Y. Fudamoto, G. D. Illingworth, D. Magee, R. J. McLure, D. J. Leod, M. J. Micha{\l}owski, M. Stefanon, P. G. van Dokkum, A. Weibel
https…

Quiescent or dusty? Unveiling the nature of extremely red galaxies at $z>3$
The advent of the JWST has revolutionised our understanding of high-redshift galaxies. In particular, the NIRCam instrument on-board JWST has revealed a population of Hubble Space Telescope (HST)-dark galaxies that had previously evaded optical detection, potentially due to significant dust obscuration, quiescence, or simply extreme redshift. Here, we present the first NIRSpec spectra of 23 HST-dark galaxies ($\mathrm{H-F444W>1.75}$), unveiling their nature and physical properties. This sample …

Harnessing Physical Climate Risk Scoring Across CRE Investment Management Verticals
#RealEstate #MoodysCRE #MA_CRESolutions

This https://arxiv.org/abs/2308.10289 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Parameter Estimation-Based States Reconstruction of Uncertain Linear Systems with Overparameterization and Unknown Additive Perturbations
The problem of state reconstruction is considered for uncertain linear time-invariant systems with overparameterization, arbitrary state-space matrices and unknown additive perturbation described by an exosystem. A novel adaptive observer is proposed to solve it, which, unlike known solutions, simultaneously: (i) reconstructs the physical state of the original system rather than the virtual state of its observer canonical form, (ii) ensures exponential convergence of the reconstruction error to…

Prediction of Space Weather Events through Analysis of Active Region Magnetograms using Convolutional Neural Network
Shlesh Sakpal
https://arxiv.org/abs/2405.02545

Prediction of Space Weather Events through Analysis of Active Region Magnetograms using Convolutional Neural Network
Although space weather events may not directly affect human life, they have the potential to inflict significant harm upon our communities. Harmful space weather events can trigger atmospheric changes that result in physical and economic damages on a global scale. In 1989, Earth experienced the effects of a powerful geomagnetic storm that caused satellites to malfunction, while triggering power blackouts in Canada, along with electricity disturbances in the United States and Europe. With the so…

Data-driven sparse modeling of oscillations in plasma space propulsion
B. Bay\'on-Buj\'an, M. Merino
https://arxiv.org/abs/2403.06809 https://

Data-driven sparse modeling of oscillations in plasma space propulsion
An algorithm to obtain data-driven models of oscillatory phenomena in plasma space propulsion systems is presented, based on sparse regression (SINDy) and Pareto front analysis. The algorithm can incorporate physical constraints, use data bootstrapping for additional robustness, and fine-tuning to different metrics. Standard, weak and integral SINDy formulations are discussed and compared. The scheme is benchmarked in the case of breathing-mode oscillations in Hall effect thrusters, using PIC/f…

Physical properties of asteroid #Dimorphos as derived from the #DART impact: #asteroid didn’t just leave a dent – it reshaped the space rock: https://theconversation.com/a-nasa-mission-that-collided-with-an-asteroid-didnt-just-leave-a-dent-it-reshaped-the-space-rock-224318

Realization of nodal ring semimetal in pressurized black phosphorus
Kazuto Akiba, Yuichi Akahama, Masashi Tokunaga, Tatsuo C. Kobayashi
https://arxiv.org/abs/2404.10192

Realization of nodal ring semimetal in pressurized black phosphorus
Topological semimetals are intriguing targets for exploring unconventional physical properties of massless fermions. Among them, nodal line or nodal ring semimetals have attracted attention for their unique one-dimensional band contact in momentum space and resulting nontrivial quantum phenomena. By field angular resolved magnetotransport measurements and theoretical calculations, we show that pressurized black phosphorus (BP) is an ideal nodal ring semimetal with weak spin-orbit coupling, whic…

The Reddit user is asking for job board recommendations specifically oriented towards cybersecurity roles. They are unsatisfied with the results they get from LinkedIn and Indeed, as they usually get unrelated or physical security job listings. https://reddit.com/r/cybersecurity/comments/1bvwmyf/

Energy-Based Optimization of Physical-Layer Challenge-Response Authentication with Drones
Francesco Ardizzon, Damiano Salvaterra, Mattia Piana, Stefano Tomasin
https://arxiv.org/abs/2405.03608

Energy-Based Optimization of Physical-Layer Challenge-Response Authentication with Drones
Drones are expected to be used for many tasks in the future and require secure communication protocols. In this work, we propose a novel physical layer authentication (PLA)-based challenge-response (CR) protocol in which a drone Bob authenticates the sender (either on the ground or air) by exploiting his prior knowledge of the wireless channel statistic (fading, path loss, and shadowing). In particular, Bob will move to a set of positions in the space, and by estimating the attenuations of the …

Kantowski-Sachs and Bianchi III dynamics in $f\left(Q\right)$-gravity
Alfredo D. Millano, K. Dialektopoulos, N. Dimakis, A. Giacomini, H. Shababi, Amlan Halder, A. Paliathanasis
https://arxiv.org/abs/2403.06922

Kantowski-Sachs and Bianchi III dynamics in $f\left(Q\right)$-gravity
We explore the phase-space of homogeneous and anisotropic spacetimes within symmetric teleparallel $f(Q)$-gravity. Specifically, we consider the Kantowski-Sachs and locally rotational Bianchi III geometries to describe the physical space. By analyzing the phase-space, we reconstruct the cosmological history dictated by $f(Q)$-gravity and comment about the theory's viability. Our findings suggest that the free parameters of the connection must be constrained to eliminate nonlinear terms in the f…

Data driven approach to study the transition from dispersive to dissipative systems through dimensionality reduction techniques
Mairembam Kelvin Singh, A. Surjalal Sharma, N. Nimai Singh, Moirangthem Shubhakanta Singh
https://arxiv.org/abs/2403.06987

Data driven approach to study the transition from dispersive to dissipative systems through dimensionality reduction techniques
Complexity is often exhibited in dynamical systems, where certain parameters evolve with time in a strange and chaotic nature. These systems lack predictability and are common in the physical world. Dissipative systems are one of such systems where the volume of the phase space contracts with time. On the other hand, we employ dimensionality reduction techniques to study complicated and complex data, which are tough to analyse. The Principal Component Analysis (PCA) is a dimensionality reductio…

Learning a Generalized Physical Face Model From Data
Lingchen Yang, Gaspard Zoss, Prashanth Chandran, Markus Gross, Barbara Solenthaler, Eftychios Sifakis, Derek Bradley
https://arxiv.org/abs/2402.19477

Learning a Generalized Physical Face Model From Data
Physically-based simulation is a powerful approach for 3D facial animation as the resulting deformations are governed by physical constraints, allowing to easily resolve self-collisions, respond to external forces and perform realistic anatomy edits. Today's methods are data-driven, where the actuations for finite elements are inferred from captured skin geometry. Unfortunately, these approaches have not been widely adopted due to the complexity of initializing the material space and learning t…

Detecting Ultralight Dark Matter Gravitationally with Laser Interferometers in Space
Jiang-Chuan Yu, Yan Cao, Yong Tang, Yue-Liang Wu
https://arxiv.org/abs/2404.04333

Detecting Ultralight Dark Matter Gravitationally with Laser Interferometers in Space
Ultralight dark matter (ULDM) is one of the leading well-motivated dark matter candidates, predicted in many theories beyond the standard model of particle physics and cosmology. There have been increasing interests in searching for ULDM in physical and astronomical experiments, mostly assuming there are additional interactions other than gravity between ULDM and normal matter. Here we demonstrate that even if ULDM has only gravitational interaction, it shall induce gravitational perturbations …

Hang on to your hats, kids, this is going to be a ride:
> To mark the passing of Stephen Hawking, we gathered together his 55 papers in Physical Review D and Physical Review Letters. They probe the edges of space and time, from "Black holes and thermodynamics” to "Wave function of the Universe."
Phys. Rev. D 73, 123527 (2006) - Populating the landscape: A top-down approach

Enhanced Thermal Management in High-Temperature Applications: Design and Optimization of a Water-Cooled Forced Convection System in a Hollow Cuboid Vapour Chamber Using COMSOL and MATLAB
brandon Curtis Colelough
https://arxiv.org/abs/2405.02303

Enhanced Thermal Management in High-Temperature Applications: Design and Optimization of a Water-Cooled Forced Convection System in a Hollow Cuboid Vapour Chamber Using COMSOL and MATLAB
This report details the design and optimisation of a water-cooled forced convection heat dissipation system for use in high-temperature applications (ranges between 700 degrees - 1000 degrees K). A hollow cuboid vapour chamber model was investigated. The space within the hollow cuboid was used as the design space. COMSOL, a FEM software product was used to solve for the physical parameters of each geometry for the heat dissipation system design space. COMSOL in conjunction with MATLAB was used …

Two-particle angular correlations of identified particles in pp and p--Pb collisions at LHC energies with ALICE
Daniela Ruggiano
https://arxiv.org/abs/2403.02549 https://arxiv.org/pdf/2403.02549
arXiv:2403.02549v1 Announce Type: new
Abstract: The two-particle angular correlations in the $\Delta$y,$\Delta\varphi$ space provide valuable insights into the properties of hadronization mechanisms and quark-gluon plasma properties. The correlation functions are influenced by several physical sources, including mini-jet correlations, Bose-Einstein quantum statistics, resonance decays, conservation of energy and momentum, and other factors. Each correlation source has unique properties, and therefore each correlation function has a distinct form depending on transverse momentum and/or multiplicity. Previous results from angular correlation analysis of pp collisions at the LHC energies indicate an anticorrelation for pairs of baryons of the same sign in $\Delta\eta,\Delta\varphi$ space. This contradicts the predictions of Monte Carlo models, such as PYTHIA8 and EPOS. This study aims to investigate this behavior by exploring the correlation functions of different charge combinations of the detected particles (specifically, $\rm{\pi^{\pm}}$, $\rm{K^{\pm}}$, and $\rm{p}$$\bar{\rm{p}}$) and multiplicity classes in the $\Delta$y$,\Delta\varphi$ space for pp and p--Pb collisions at LHC energies. In addition, the study includes a comparison of the results obtained from both collision systems.

Quiescent or dusty? Unveiling the nature of extremely red galaxies at $z>3$
L. Barrufet, P. Oesch, R. Marques-Chaves, K. Arellano-Cordova, J. F. W. Baggen, A. C. Carnall, F. Cullen, J. S. Dunlop, R. Gottumukkala, Y. Fudamoto, G. D. Illingworth, D. Magee, R. J. McLure, D. J. Leod, M. J. Micha{\l}owski, M. Stefanon, P. G. van Dokkum, A. Weibel
https…

Quiescent or dusty? Unveiling the nature of extremely red galaxies at $z>3$
The advent of the JWST has revolutionised our understanding of high-redshift galaxies. In particular, the NIRCam instrument on-board JWST has revealed a population of Hubble Space Telescope (HST)-dark galaxies that had previously evaded optical detection, potentially due to significant dust obscuration, quiescence, or simply extreme redshift. Here, we present the first NIRSpec spectra of 23 HST-dark galaxies ($\mathrm{H-F444W>1.75}$), unveiling their nature and physical properties. This sample …

Hypothesis Spaces for Deep Learning
Rui Wang, Yuesheng Xu, Mingsong Yan
https://arxiv.org/abs/2403.03353 https://arxiv.org/pdf/2403.0…

Hypothesis Spaces for Deep Learning
This paper introduces a hypothesis space for deep learning that employs deep neural networks (DNNs). By treating a DNN as a function of two variables, the physical variable and parameter variable, we consider the primitive set of the DNNs for the parameter variable located in a set of the weight matrices and biases determined by a prescribed depth and widths of the DNNs. We then complete the linear span of the primitive DNN set in a weak* topology to construct a Banach space of functions of the…

So far in various testing of my PC/OS setup, it seems that perhaps the oddness of my physical setup is wreaking some mild havoc. You see, living in an RV has made for some interesting hurdles.
1)Tower is in the bedroom as that's the only space I had for it.
2) I have many dongles and a hub, trying to ensure wireless access to the tower, as I am NOT in the bedroom as I type this.
3)Driving 3 screens,two 1080p in the bdr, one 1440p out here. This means long cables. 1/?

Preserving Nonlinear Constraints in Variational Flow Filtering Data Assimilation
Amit N. Subrahmanya, Andrey A. Popov, Reid J. Gomillion, Adrian Sandu
https://arxiv.org/abs/2405.04380

Preserving Nonlinear Constraints in Variational Flow Filtering Data Assimilation
Data assimilation aims to estimate the states of a dynamical system by optimally combining sparse and noisy observations of the physical system with uncertain forecasts produced by a computational model. The states of many dynamical systems of interest obey nonlinear physical constraints, and the corresponding dynamics is confined to a certain sub-manifold of the state space. Standard data assimilation techniques applied to such systems yield posterior states lying outside the manifold, violati…

This https://arxiv.org/abs/2308.10289 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Parameter Estimation-Based States Reconstruction of Uncertain Linear Systems with Overparameterization and Unknown Additive Perturbations
The problem of state reconstruction is considered for uncertain linear time-invariant systems with overparameterization, arbitrary state-space matrices and unknown additive perturbation described by an exosystem. A novel adaptive observer is proposed to solve it, which, unlike known solutions, simultaneously: (i) reconstructs the physical state of the original system rather than the virtual state of its observer canonical form, (ii) ensures exponential convergence of the reconstruction error to…

When I heard about this place recently thanks to @… one of my first thoughts was this kind of sports bar should expand nationally. Welp👇
#sports

Portland’s The Sports Bra plans national expansion through franchises amid booming interest in women’s sports
Under CEO Jenny Nguyen«s plan, bars and entrepreneurs elsewhere will be able to apply to use The Sports Bra brand for their franchises. She»s open to working with people who already have a physical space, as well as those who may only have a business plan.

An employee's employer asked them to conduct a physical pentest despite having no experience and the company lacking a formal process or documentation. They are seeking advice on what a pentest project's scope should include, documentation for protection, and tips for a smooth procedure. https://reddit.com/r/cybersecurity/comments/1bv6rg9/

Matter in Discrete Space-Times
P. P. Divakaran
https://arxiv.org/abs/2404.04548 https://arxiv.org/pdf/2404.04548

Matter in Discrete Space-Times
The unitary representations of the Poincare group of a discrete space-time are constructed, following the Wigner method in continuum relativity. They can be interpreted as elementary particles with one significant new feature: the momentum space being the 4-torus is identified as the Brillouin zone of space-time where all physical phenomena occur. Consequently 4-momentum is defined and conserved only modulo a reciprocal lattice vector of the order of the Planck mass, implying that there is no n…

Silica: Microsoft's research on archival data storage on glass.
- 1,000 year durability without bitrot
- Zero resources used when data is at rest, except physical space
- Environmental impact largely restricted to time of manufacture, not constantly scaling through time of use
https://www.youtube.co…

This https://arxiv.org/abs/1908.00379 has been replaced.
link: https://scholar.google.com/scholar?q=a

Outstanding: A Multi-Perspective Travel Approach for Virtual Reality Games
In virtual reality games, players dive into fictional environments and can experience a compelling and immersive world. State-of-the-art VR systems allow for natural and intuitive navigation through physical walking. However, the tracking space is still limited, and viable alternatives are required to reach further virtual destinations. Our work focuses on the exploration of vast open worlds - an area where existing local navigation approaches such as the arc-based teleport are not ideally suit…

Numerical model of Phobos' motion incorporating the effects of free rotation
Yongzhang Yang, Jianguo Yan, Nianchuan Jian, Koji Matsumoto, Jean-Pierre Barriot
https://arxiv.org/abs/2405.05519

Numerical model of Phobos' motion incorporating the effects of free rotation
High-precision ephemerides are not only useful in supporting space missions, but also in investigating the physical nature of celestial bodies. This paper reports an update to the orbit and rotation model of the Martian moon Phobos. In contrast to earlier numerical models, this paper details a dynamical model that fully considers the rotation of Phobos. Here, Phobos' rotation is first described by Euler's rotational equations and integrated simultaneously with the orbital motion equations. We d…

Secrecy Performance Analysis of Space-to-Ground Optical Satellite Communications
Thang V. Nguyen, Thanh V. Pham, Anh T. Pham, Dang T. Ngoc
https://arxiv.org/abs/2402.13554

Secrecy Performance Analysis of Space-to-Ground Optical Satellite Communications
Free-space optics (FSO)-based satellite communication systems have recently received considerable attention due to their enhanced capacity compared to their radio frequency (RF) counterparts. This paper analyzes the performance of physical layer security of space-to-ground intensity modulation/direct detection FSO satellite links under the effect of atmospheric loss, misalignment, cloud attenuation, and atmospheric turbulence-induced fading. Specifically, a wiretap channel consisting of a legit…

This https://arxiv.org/abs/2212.12919 has been replaced.
link: https://scholar.google.com/scholar?q=a

Scalar Curvature of the Quantum Exponential Family for the Transverse-Field Ising Model and the Quantum Phase Transition
Unlike for classical many-body systems, the scalar curvature of the exponential family for quantum many-body systems has been not so investigated, and its physical meaning remains unclear. In this paper, we analytically study the scalar curvature of the space of Gibbs thermal states, belonging to the quantum exponential family, equipped with the Bogoliubov-Kubo-Mori metric for the zero- and one-dimensional transverse-field Ising model at low and high temperatures. We find that these scalar curv…

This https://arxiv.org/abs/2401.12816 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Ray-Singer Torsion, Topological Strings and Black Holes
Genus one amplitude for topological strings on Calabi-Yau 3-folds can be computed using mirror symmetry: The partition function at genus one gets mapped to a holomorphic version of Ray-Singer torsion on the mirror Calabi-Yau. On the other hand it can be shown by a physical argument that this gives a curvature squared correction term to the gravitational action. This in paticular leads to an effective quantum gravity cutoff known as the species scale, which varies over moduli space of Calabi-Yau…

This https://arxiv.org/abs/2310.16107 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Physicality of evolution and statistical contractivity are equivalent notions of maps
Statistical quantifiers are generically required to contract under physical evolutions, following the intuition that information should be lost under noisy transformations. This principle is very relevant in statistics, and it even allows to derive uniqueness results based on it: by imposing their contractivity under any physical maps, the Chentsov-Petz theorem singles out a unique family of metrics on the space of probability distributions (or density matrices) called the Fisher information me…

Discretization Error of Fourier Neural Operators
Samuel Lanthaler, Andrew M. Stuart, Margaret Trautner
https://arxiv.org/abs/2405.02221 https://

Discretization Error of Fourier Neural Operators
Operator learning is a variant of machine learning that is designed to approximate maps between function spaces from data. The Fourier Neural Operator (FNO) is a common model architecture used for operator learning. The FNO combines pointwise linear and nonlinear operations in physical space with pointwise linear operations in Fourier space, leading to a parameterized map acting between function spaces. Although FNOs formally involve convolutions of functions on a continuum, in practice the com…

Hypothesis Spaces for Deep Learning
Rui Wang, Yuesheng Xu, Mingsong Yan
https://arxiv.org/abs/2403.03353 https://arxiv.org/pdf/2403.0…

Hypothesis Spaces for Deep Learning
This paper introduces a hypothesis space for deep learning that employs deep neural networks (DNNs). By treating a DNN as a function of two variables, the physical variable and parameter variable, we consider the primitive set of the DNNs for the parameter variable located in a set of the weight matrices and biases determined by a prescribed depth and widths of the DNNs. We then complete the linear span of the primitive DNN set in a weak* topology to construct a Banach space of functions of the…

Subconvexity Implies Effective Quantum Unique Ergodicity for Hecke-Maa{\ss} Cusp Forms on $\mathrm{SL}_2(\mathbb{Z}) \backslash \mathrm{SL}_2(\mathbb{R})$
Ankit Bisain, Peter Humphries, Andrei Mandelshtam, Noah Walsh, Xun Wang
https://arxiv.org/abs/2402.14050

Subconvexity Implies Effective Quantum Unique Ergodicity for Hecke-Maaß Cusp Forms on $\mathrm{SL}_2(\mathbb{Z}) \backslash \mathrm{SL}_2(\mathbb{R})$
It is a folklore result in arithmetic quantum chaos that quantum unique ergodicity on the modular surface with an effective rate of convergence follows from subconvex bounds for certain triple product $L$-functions. The physical space manifestation of this result, namely the equidistribution of mass of Hecke-Maass cusp forms, was proven to follow from subconvexity by Watson, whereas the phase space manifestation of quantum unique ergodicity has only previously appeared in the literature for Eis…

FloorSet - a VLSI Floorplanning Dataset with Design Constraints of Real-World SoCs
Uday Mallappa, Hesham Mostafa, Mikhail Galkin, Mariano Phielipp, Somdeb Majumdar
https://arxiv.org/abs/2405.05480

FloorSet - a VLSI Floorplanning Dataset with Design Constraints of Real-World SoCs
Floorplanning for systems-on-a-chip (SoCs) and its sub-systems is a crucial and non-trivial step of the physical design flow. It represents a difficult combinatorial optimization problem. A typical large scale SoC with 120 partitions generates a search-space of nearly 10E250. As novel machine learning (ML) approaches emerge to tackle such problems, there is a growing need for a modern benchmark that comprises a large training dataset and performance metrics that better reflect real-world constr…

This https://arxiv.org/abs/2305.10970 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Domain Wall Bianchi Type $VI_0$ Universe in $f(R,T)$ Gravity
We consider the Bianchi type-$VI_0$ space time with domain walls in the framework of the modified $f (R, T)$ theory of gravitation. To solve the field equations, we assume that the shear scalar $(σ)$ is proportional to the expansion scalar $(θ)$. We also consider the parametrization of the equation of the state parameter of barotropic fluid and discuss the effect on domain walls. It has been observed that the domain wall may behave like dark energy. Some physical parameters are also discussed…

This https://arxiv.org/abs/2308.15420 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Geometry and unitarity of scalar fields coupled to gravity
We formulate scalar field theories coupled non-conformally to gravity in a manifestly frame-independent fashion. Physical quantities such as the $S$ matrix should be invariant under field redefinitions, and hence can be represented by the geometry of the target space. This elegant geometric formulation, however, is obscured when considering the coupling to gravity because of the redundancy associated with the Weyl transformation. The well-known example is the Higgs inflation, where the target s…

Information Processing in Hybrid Photonic Electrical Reservoir Computing
Prabhav Gaur, Chengkuan Gao, Karl Johnson, Shimon Rubin, Yeshaiahu Fainman, Tzu-Chien Hsueh
https://arxiv.org/abs/2404.01479

Information Processing in Hybrid Photonic Electrical Reservoir Computing
Physical Reservoir Computing (PRC) is a recently developed variant of Neuromorphic Computing, where a pertinent physical system effectively projects information encoded in the input signal into a higher-dimensional space. While various physical hardware has demonstrated promising results for Reservoir Computing (RC), systems allowing tunability of their dynamical regimes have not received much attention regarding how to optimize relevant system parameters. In this work we employ hybrid photonic…

Global Search Optics: Automatically Exploring Optimal Solutions to Compact Computational Imaging Systems
Yao Gao, Qi Jiang, Shaohua Gao, Lei Sun, Kailun Yang, Kaiwei Wang
https://arxiv.org/abs/2404.19201 https://arxiv.org/pdf/2404.19201
arXiv:2404.19201v1 Announce Type: new
Abstract: The popularity of mobile vision creates a demand for advanced compact computational imaging systems, which call for the development of both a lightweight optical system and an effective image reconstruction model. Recently, joint design pipelines come to the research forefront, where the two significant components are simultaneously optimized via data-driven learning to realize the optimal system design. However, the effectiveness of these designs largely depends on the initial setup of the optical system, complicated by a non-convex solution space that impedes reaching a globally optimal solution. In this work, we present Global Search Optics (GSO) to automatically design compact computational imaging systems through two parts: (i) Fused Optimization Method for Automatic Optical Design (OptiFusion), which searches for diverse initial optical systems under certain design specifications; and (ii) Efficient Physic-aware Joint Optimization (EPJO), which conducts parallel joint optimization of initial optical systems and image reconstruction networks with the consideration of physical constraints, culminating in the selection of the optimal solution. Extensive experimental results on the design of three-piece (3P) sphere computational imaging systems illustrate that the GSO serves as a transformative end-to-end lens design paradigm for superior global optimal structure searching ability, which provides compact computational imaging systems with higher imaging quality compared to traditional methods. The source code will be made publicly available at https://github.com/wumengshenyou/GSO.

This https://arxiv.org/abs/2210.16178 has been replaced.
link: https://scholar.google.com/scholar?q=a

Vertex operators for imaginary $\mathfrak{gl}_2$ subalgebras in the Monster Lie Algebra
The Monster Lie algebra $\mathfrak m$ is a quotient of the physical space of the vertex algebra $V=V^\natural\otimes V_{1,1}$, where $V^\natural$ is the Moonshine module vertex operator algebra of Frenkel, Lepowsky, and Meurman, and $V_{1,1}$ is the vertex algebra corresponding to the rank 2 even unimodular lattice $\textrm{II}_{1,1}$. We construct vertex algebra elements that project to bases for subalgebras of $\mathfrak m$ isomorphic to $\mathfrak{gl}_{2}$, corresponding to each imaginary si…

Mesoscopic Lattice Boltzmann modeling of dense gas flows in curvilinear geometries
Sergiu Busuioc
https://arxiv.org/abs/2403.15051 https://

Mesoscopic Lattice Boltzmann modeling of dense gas flows in curvilinear geometries
We derive the Enskog equation utilizing orthonormal vielbein fields, enabling the utilization of arbitrary coordinate systems to characterize spatial geometry. Additionally, we employ an adapted coordinate system in the momentum space, connected to the physical space through vielbeins. Within this framework, the momentum component perpendicular to a curved boundary can be treated as an independent one, facilitating the application of half-range Gauss-Hermite quadratures. We develop an appropria…

This https://arxiv.org/abs/2212.12919 has been replaced.
link: https://scholar.google.com/scholar?q=a

Scalar Curvature of the Quantum Exponential Family for the Transverse-Field Ising Model and the Quantum Phase Transition
Unlike for classical many-body systems, the scalar curvature of the exponential family for quantum many-body systems has been not so investigated, and its physical meaning remains unclear. In this paper, we analytically study the scalar curvature of the space of Gibbs thermal states, belonging to the quantum exponential family, equipped with the Bogoliubov-Kubo-Mori metric for the zero- and one-dimensional transverse-field Ising model at low and high temperatures. We find that these scalar curv…

This https://arxiv.org/abs/2305.18052 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The arrival time and energy of FRBs traverse the time-energy bivariate space like a Brownian motion
The origin of fast radio bursts (FRBs), the brightest cosmic explosion in radio bands, remains unknown. We introduce here a novel method for a comprehensive analysis of active FRBs' behaviors in the time-energy domain. Using ``Pincus Index'' and ``Maximum Lyapunov Exponent'', we were able to quantify the randomness and chaoticity, respectively, of the bursting events and put FRBs in the context of common transient physical phenomena, such as pulsar, earthquakes, and solar flares. In the bivaria…

This https://arxiv.org/abs/2303.15187 has been replaced.
link: https://scholar.google.com/scholar?q=a

Avatarm: an Avatar With Manipulation Capabilities for the Physical Metaverse
Metaverse is an immersive shared space that remote users can access through virtual and augmented reality interfaces, enabling their avatars to interact with each other and the surrounding. Although digital objects can be manipulated, physical objects cannot be touched, grasped, or moved within the metaverse due to the lack of a suitable interface. This work proposes a solution to overcome this limitation by introducing the concept of a Physical Metaverse enabled by a new interface named "Avata…

Beyond MACS: Physical properties of extremely X-ray luminous clusters at $z > 0.5$
H. Ebeling (IfA/UH), J. Richard (CRAL/Lyon), B. Beauchesne (EPFL), Q. Basto (CRAL/Lyon), A. C. Edge (CEA/Durham), I. Smail (CEA/Durham)
https://arxiv.org/abs/2404.11659

Beyond MACS: Physical properties of extremely X-ray luminous clusters at $z > 0.5$
We present a sample of over 100 highly X-ray luminous galaxy clusters at $z\sim$ 0.5-0.9, discovered by the extended Massive Cluster Survey (eMACS) in ROSAT All-Sky Survey (RASS) data. Follow-up observations of a subset at higher resolution and greater depth with the Chandra X-ray Observatory are used to map the gaseous intra-cluster medium, while strong-gravitational-lensing features identified in Hubble Space Telescope imaging allow us to constrain the total mass distribution. We present evid…

This https://arxiv.org/abs/2312.09270 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Towards establishing a connection between two-level quantum systems and physical spaces
This work seeks to make explicit the operational connection between the preparation of two-level quantum systems with their corresponding description (as states) in a Hilbert space. This may sound outdated, but we show there is more to this connection than common sense may lead us to believe. To bridge these two separated realms -- the actual laboratory and the space of states -- we rely on a paradigmatic mathematical object: the Hopf fibration. We illustrate how this connection works in practi…

Moir\'e patterns of space-filling curves
Henning U. Voss, Douglas J. Ballon
https://arxiv.org/abs/2403.16891 https://arxiv.org/pd…

Moiré patterns of space-filling curves
It is shown on the examples of Moore and Gosper curves that two spatially shifted or twisted, pre-asymptotic space-filling curves can produce large-scale superstructures akin to moiré patterns. To study physical phenomena emerging from these patterns, a geometrical coupling coefficient based on the Neumann integral is introduced. It is found that moiré patterns appear most defined at the peaks of those coefficients. A physical interpretation of these coefficients as a measure for inductive co…

This https://arxiv.org/abs/2402.07879 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

3D physical structure and angular expansion of the remnant of the recurrent nova T Pyx
We present the analysis of archival Very Large Telescope (VLT) MUSE and multi-epoch Hubble Space Telescope (HST) WFPC2 and WFC3/UVIS narrow-band observations of the remnant associated with the ejecta of the mid-nineteenth century outburst of the recurrent nova T Pyx. These data sets are used to investigate its true 3D physical structure and the nebular expansion patterns along the line of sight and on the plane of the sky. The VLT MUSE emission line maps and 3D visualisations based on position-…

Extracting coherent sets in aperiodically driven flows from generators of Mather semigroups
Robin Chemnitz, Maximilian Engel, P\'eter Koltai
https://arxiv.org/abs/2403.19274 <…

Extracting coherent sets in aperiodically driven flows from generators of Mather semigroups
Coherent sets are time-dependent regions in the physical space of nonautonomous flows that exhibit little mixing with their neighborhoods, robustly under small random perturbations of the flow. They thus characterize the global long-term transport behavior of the system. We propose a framework to extract such time-dependent families of coherent sets for nonautonomous systems with an ergodic driving dynamics and (small) Brownian noise in physical space. Our construction involves the assembly and…

Causal Graph Dynamics and Kan Extensions
Luidnel Maignan (LACL), Antoine Spicher (LACL)
https://arxiv.org/abs/2403.13393 https://arxi…

Causal Graph Dynamics and Kan Extensions
On the one side, the formalism of Global Transformations comes with the claim of capturing any transformation of space that is local, synchronous and deterministic.The claim has been proven for different classes of models such as mesh refinements from computer graphics, Lindenmayer systems from morphogenesis modeling and cellular automata from biological, physical and parallel computation modeling.The Global Transformation formalism achieves this by using category theory for its genericity, and…

This https://arxiv.org/abs/2402.17817 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Gradient Properties of Perturbative Multiscalar RG Flows to Six Loops
The gradient property of the renormalisation group (RG) flow of multiscalar theories is examined perturbatively in $d=4$ and $d=4-\varepsilon$ dimensions. Such theories undergo RG flows in the space of quartic couplings $λ^I$. Starting at five loops, the relevant vector field that determines the physical RG flow is not the beta function traditionally computed in a minimal subtraction scheme in dimensional regularisation, but a suitable modification of it, the $B$ function. It is found that up …

Vacuum amplitudes and time-like causal unitary in the loop-tree duality
The LTD Collaboration, Selomit Ram\'irez-Uribe, Andr\'es E. Renter\'ia-Olivo, David F. Renter\'ia-Estrada, Jorge J. Mart\'inez de Lejarza, Prasanna K. Dhani, Leandro Cieri, Roger J. Hern\'andez-Pinto, German F. R. Sborlini, William J. Torres Bobadilla, Germ\'an Rodrigo

Vacuum amplitudes and time-like causal unitary in the loop-tree duality
We present the first proof-of-concept application to decay processes at higher perturbative orders of LTD causal unitary, a novel methodology that exploits the causal properties of vacuum amplitudes in the loop-tree duality (LTD) and is directly well-defined in the four physical dimensions of the space-time. The generation of loop- and tree-level contributions to the differential decay rates from a kernel multiloop vacuum amplitude is shown in detail, and explicit expressions are presented for …

Distributed Radiance Fields for Edge Video Compression and Metaverse Integration in Autonomous Driving
Eugen \v{S}lapak, Mat\'u\v{s} Dopiriak, Mohammad Abdullah Al Faruque, Juraj Gazda, Marco Levorato
https://arxiv.org/abs/2402.14642

Distributed Radiance Fields for Edge Video Compression and Metaverse Integration in Autonomous Driving
The metaverse is a virtual space that combines physical and digital elements, creating immersive and connected digital worlds. For autonomous mobility, it enables new possibilities with edge computing and digital twins (DTs) that offer virtual prototyping, prediction, and more. DTs can be created with 3D scene reconstruction methods that capture the real world's geometry, appearance, and dynamics. However, sending data for real-time DT updates in the metaverse, such as camera images and videos …

This https://arxiv.org/abs/2401.01239 has been replaced.
initial toot: https://mastoxiv.page/@…

Phase space maximal entropy random walk: Langevin-like ensembles of physical trajectories
As written by statistician George Box "All models are wrong, but some are useful", standard diffusion derivation or Feynman path ensembles use nonphysical infinite velocity/kinetic energy nowhere differentiable trajectories - what seems wrong, might be only our approximation to simplify mathematics. This article introduces some basic tools to investigate this issue. To consider ensembles of more physical finite velocity trajectories, we can work in $(x,v)$ phase space like in Langevin equation …

This https://arxiv.org/abs/2312.08280 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

New High-Order Numerical Methods for Hyperbolic Systems of Nonlinear PDEs with Uncertainties
In this paper, we develop new high-order numerical methods for hyperbolic systems of nonlinear partial differential equations (PDEs) with uncertainties. The new approach is realized in the semi-discrete finite-volume framework and is based on fifth-order weighted essentially non-oscillatory (WENO) interpolations in (multidimensional) random space combined with second-order piecewise linear reconstruction in physical space. Compared with spectral approximations in the random space, the presented…

A Signature Based Approach Towards Global Channel Charting with Ultra Low Complexity
Longhai Zhao, Yunchuan Yang, Qi Xiong, He Wang, Bin Yu, Feifei Sun, Chengjun Sun
https://arxiv.org/abs/2403.20091

A Signature Based Approach Towards Global Channel Charting with Ultra Low Complexity
Channel charting, an unsupervised learning method that learns a low-dimensional representation from channel information to preserve geometrical property of physical space of user equipments (UEs), has drawn many attentions from both academic and industrial communities, because it can facilitate many downstream tasks, such as indoor localization, UE handover, beam management, and so on. However, many previous works mainly focus on charting that only preserves local geometry and use raw channel i…

This https://arxiv.org/abs/2307.10478 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Embedded coherent structures from MHD to sub-ion scales in turbulent solar wind at 0.17 au
We study intermittent coherent structures in solar wind magnetic turbulence from MHD to kinetic plasma scales using Parker Solar Probe data during its first perihelion (at 0.17 au), when the satellite was in the Alfvénic slow wind of 340 km/s. The coherent structures are energetic events localized in time and covering wide range of scales. We detect them using Morlet wavelets. For the first time, we apply a multi-scale analyses in physical space to study these structures. At MHD scales within …

Extracting coherent sets in aperiodically driven flows from generators of Mather semigroups
Robin Chemnitz, Maximilian Engel, P\'eter Koltai
https://arxiv.org/abs/2403.19274 <…

Extracting coherent sets in aperiodically driven flows from generators of Mather semigroups
Coherent sets are time-dependent regions in the physical space of nonautonomous flows that exhibit little mixing with their neighborhoods, robustly under small random perturbations of the flow. They thus characterize the global long-term transport behavior of the system. We propose a framework to extract such time-dependent families of coherent sets for nonautonomous systems with an ergodic driving dynamics and (small) Brownian noise in physical space. Our construction involves the assembly and…

The Application of Tailored Fields for Studying Chirality and Symmetry
Dino Habibovi\'c, Kathryn R. Hamilton, Ofer Neufeld, Laura Rego
https://arxiv.org/abs/2404.05923

The Application of Tailored Fields for Studying Chirality and Symmetry
Ultrashort laser pulses pose unique tools to trigger and probe the fastest charge dynamics in matter, allowing the investigation of fundamental physical phenomena with unprecedented resolution in space, time, and energy. One of the most fascinating opportunities that ultrashort pulses offer is the possibility of modulating and investigating symmetries by tailoring the properties of the laser beam in the spatial and polarization domains, effectively controlling symmetry breaking on multiple leve…

Scalar Perturbations in Nonsingular Universes from Interacting Vacuum
Filipe Cattete Alves, Rodrigo Maier
https://arxiv.org/abs/2405.05936 https://<…

Scalar Perturbations in Nonsingular Universes from Interacting Vacuum
In this paper we examine the stability of scalar perturbations in nonsingular models which emerge from an interacting vacuum component. The analysis developed in this paper relies on two phenomenological choices for the energy exchange between a nonrelativistic fluid and a vacuum component. In both scenarios it can be shown that closed models may furnish nonsingular orbits of physical interest in phase space once a decelerated past era is connected to a graceful exit to late-time acceleration. …

This https://arxiv.org/abs/2401.15078 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Physical Yukawa Couplings in Heterotic String Compactifications
One of the challenges of heterotic compactification on a Calabi-Yau threefold is to determine the physical $(\mathbf{27})^3$ Yukawa couplings of the resulting four-dimensional $\mathcal{N}=1$ theory. In general, the calculation necessitates knowledge of the Ricci-flat metric. However, in the standard embedding, which references the tangent bundle, we can compute normalized Yukawa couplings from the Weil-Petersson metric on the moduli space of complex structure deformations of the Calabi-Yau man…

A Comprehensive Review of Latent Space Dynamics Identification Algorithms for Intrusive and Non-Intrusive Reduced-Order-Modeling
Christophe Bonneville, Xiaolong He, April Tran, Jun Sur Park, William Fries, Daniel A. Messenger, Siu Wun Cheung, Yeonjong Shin, David M. Bortz, Debojyoti Ghosh, Jiun-Shyan Chen, Jonathan Belof, Youngsoo Choi
https://

A Comprehensive Review of Latent Space Dynamics Identification Algorithms for Intrusive and Non-Intrusive Reduced-Order-Modeling
Numerical solvers of partial differential equations (PDEs) have been widely employed for simulating physical systems. However, the computational cost remains a major bottleneck in various scientific and engineering applications, which has motivated the development of reduced-order models (ROMs). Recently, machine-learning-based ROMs have gained significant popularity and are promising for addressing some limitations of traditional ROM methods, especially for advection dominated systems. In this…

This https://arxiv.org/abs/2208.08626 has been replaced.
link: https://scholar.google.com/scholar?q=a

CP-PINNs: Data-Driven Changepoints Detection in PDEs Using Online Optimized Physics-Informed Neural Networks
We investigate the inverse problem for Partial Differential Equations (PDEs) in scenarios where the parameters of the given PDE dynamics may exhibit changepoints at random time. We employ Physics-Informed Neural Networks (PINNs) - universal approximators capable of estimating the solution of any physical law described by a system of PDEs, which serves as a regularization during neural network training, restricting the space of admissible solutions and enhancing function approximation accuracy. …

Physical Pathways for JWST-Observed Supermassive Black Holes in the Early Universe
Junehyoung Jeon, Volker Bromm, Boyuan Liu, Steven L. Finkelstein
https://arxiv.org/abs/2402.18773

Physical Pathways for JWST-Observed Supermassive Black Holes in the Early Universe
Observations with the James Webb Space Telescope (JWST) have revealed active galactic nuclei (AGN) powered by supermassive black holes with estimated masses of $10^7-10^8$ M$_\odot$ at redshifts $z\sim7-9$. Some reside in overmassive systems with higher AGN to stellar mass ratios than locally. Understanding how massive black holes could form so early in cosmic history and affect their environment to establish the observed relations today are some of the major open questions in astrophysics and …

Control-Coherent Koopman Modeling: A Physical Modeling Approach
H. Harry Asada, Jose A. Solano-Castellanos
https://arxiv.org/abs/2403.16306 https://…

Control-Coherent Koopman Modeling: A Physical Modeling Approach
The modeling of nonlinear dynamics based on Koopman operator theory, which is originally applicable only to autonomous systems with no control, is extended to non-autonomous control system without approximation to input matrix B. Prevailing methods using a least square estimate of the B matrix may result in an erroneous input matrix, misinforming the controller about the structure of the input matrix in a lifted space. Here, a new method for constructing a Koopman model that comprises the exact…

This https://arxiv.org/abs/2403.15427 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Metasurface-Enabled Multifunctional Single-Frequency Sensors without External Power
IoT sensors are crucial for visualizing multidimensional and multimodal information and enabling future IT applications/services such as cyber-physical space, digital twins, autonomous driving, smart cities, and virtual/augmented reality (VR or AR). However, IoT sensors need to be battery-free to realistically manage and maintain the growing number of available sensing devices. Here, we provide a novel sensor design approach that employs metasurfaces to enable multifunctional sensing without re…

This https://arxiv.org/abs/2402.11016 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Holographic phenomenology via overlapping degrees of freedom
The holographic principle suggests that regions of space contain fewer physical degrees of freedom than would be implied by conventional quantum field theory. Meanwhile, in Hilbert spaces of large dimension $2^n$, it is possible to define $N \gg n$ Pauli algebras that are nearly anti-commuting (but not quite) and which can be thought of as "overlapping degrees of freedom". We propose to model the phenomenology of holographic theories by allowing field-theory modes to be overlapping, and derive …

Causal Graph Dynamics and Kan Extensions
Luidnel Maignan (LACL), Antoine Spicher (LACL)
https://arxiv.org/abs/2403.13393 https://arxi…

Causal Graph Dynamics and Kan Extensions
On the one side, the formalism of Global Transformations comes with the claim of capturing any transformation of space that is local, synchronous and deterministic.The claim has been proven for different classes of models such as mesh refinements from computer graphics, Lindenmayer systems from morphogenesis modeling and cellular automata from biological, physical and parallel computation modeling.The Global Transformation formalism achieves this by using category theory for its genericity, and…

Resisting high-energy impact events through gap engineering in superconducting qubit arrays
Matt McEwen, Kevin C. Miao, Juan Atalaya, Alex Bilmes, Alex Crook, Jenna Bovaird, John Mark Kreikebaum, Nicholas Zobrist, Evan Jeffrey, Bicheng Ying, Andreas Bengtsson, Hung-Shen Chang, Andrew Dunsworth, Julian Kelly, Yaxing Zhang, Ebrahim Forati, Rajeev Acharya, Justin Iveland, Wayne Liu, Seon Kim, Brian Burkett, Anthony Megrant, Yu Chen, Charles Neill, Daniel Sank, Michel Devoret, Alex Opremca…

Resisting high-energy impact events through gap engineering in superconducting qubit arrays
Quantum error correction (QEC) provides a practical path to fault-tolerant quantum computing through scaling to large qubit numbers, assuming that physical errors are sufficiently uncorrelated in time and space. In superconducting qubit arrays, high-energy impact events produce correlated errors, violating this key assumption. Following such an event, phonons with energy above the superconducting gap propagate throughout the device substrate, which in turn generate a temporary surge in quasipar…

This https://arxiv.org/abs/1910.14022 has been replaced.
link: https://scholar.google.com/scholar?q=a

Principles Of Heliophysics: a textbook on the universal processes behind planetary habitability
Heliophysics is the system science of the physical connections between the Sun and the solar system. As the physics of the local cosmos, it embraces space weather and planetary habitability. The wider view of comparative heliophysics forms a template for conditions in exoplanetary systems and provides a view over time of the aging Sun and its magnetic activity, of the heliosphere in different settings of the interstellar medium and subject to stellar impacts, of the space physics over evolving …

Local topology for periodic Hamiltonians and fuzzy tori
Nora Doll, Terry Loring, Hermann Schulz-Baldes
https://arxiv.org/abs/2403.18931 https://

Local topology for periodic Hamiltonians and fuzzy tori
A variety of local index formulas is constructed for quantum Hamiltonians with periodic boundary conditions. All dimensions of physical space as well as many symmetry constraints are covered, notably one-dimensional systems in Class DIII as well as two- and three-dimensional systems in Class AII. The constructions are based on several periodic variations of the spectral localizer and are rooted in the existence of underlying fuzzy tori. For these latter, a general invariant theory is developed.

This https://arxiv.org/abs/2301.07456 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Parametric resonance in abelian and non-abelian gauge fields via space-time oscillations
We study the evolution of abelian $U(1)$ electromagnetic as well as non-abelian $SU(2)$ gauge fields, in the presence of space-time oscillations. Analysis of the time evolution of abelian gauge fields shows the presence of parametric resonance in spatial modes. A similar analysis in the case of non-abelian gauge fields, in the linear approximation, shows the presence of the same resonant spatial modes. The resonant modes induce large fluctuations in physical observables including those that bre…

Spin Hamiltonians in the Modulated Momenta of Light
Juan Feng, Zengya Li, Luqi Yuan, Erez Hasman, Bo Wang, Xianfeng Chen
https://arxiv.org/abs/2405.00484 h…

Spin Hamiltonians in the Modulated Momenta of Light
Photonic solvers that are able to find the ground states of different spin Hamiltonians can be used to study many interactive physical systems and combinatorial optimization problems. Here, we establish a real-and-momentum space correspondence of spin Hamiltonians by spatial light transport. The real-space spin interaction is determined by modulating the momentum-space flow of light. This principle is formulated as a generalized Plancherel theorem, allowing us to implement a simple optical simu…

Resisting high-energy impact events through gap engineering in superconducting qubit arrays
Matt McEwen, Kevin C. Miao, Juan Atalaya, Alex Bilmes, Alex Crook, Jenna Bovaird, John Mark Kreikebaum, Nicholas Zobrist, Evan Jeffrey, Bicheng Ying, Andreas Bengtsson, Hung-Shen Chang, Andrew Dunsworth, Julian Kelly, Yaxing Zhang, Ebrahim Forati, Rajeev Acharya, Justin Iveland, Wayne Liu, Seon Kim, Brian Burkett, Anthony Megrant, Yu Chen, Charles Neill, Daniel Sank, Michel Devoret, Alex Opremca…

Resisting high-energy impact events through gap engineering in superconducting qubit arrays
Quantum error correction (QEC) provides a practical path to fault-tolerant quantum computing through scaling to large qubit numbers, assuming that physical errors are sufficiently uncorrelated in time and space. In superconducting qubit arrays, high-energy impact events produce correlated errors, violating this key assumption. Following such an event, phonons with energy above the superconducting gap propagate throughout the device substrate, which in turn generate a temporary surge in quasipar…

Fluctuation induced piezomagnetism in local moment altermagnets
Kostiantyn V. Yershov, Volodymyr P. Kravchuk, Maria Daghofer, Jeroen van den Brink
https://arxiv.org/abs/2405.01893

Fluctuation induced piezomagnetism in local moment altermagnets
It was recently discovered that, depending on their symmetries, collinear antiferromagnets may break spin degeneracy in momentum space, even in absence of spin-orbit coupling. Such systems, dubbed altermagnets, have electronic bands with a spin-momentum texture set mainly by the combined crystal-magnetic symmetry. This discovery motivates the question which novel physical properties derive from altermagnetic order. Here we show that one consequence of altermagnetic order is a fluctuation-driven…

This https://arxiv.org/abs/2401.15618 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Horizons and Null Infinity: A Fugue in 4 voices
Black hole horizons in equilibrium and null infinity of asymptotically flat space-times are null 3-manifolds but have very different physical connotations. We first show that they share a large number of geometric properties, making them both weakly isolated horizons. We then use this new unified perspective to unravel the origin of the drastic differences in the physics they contain. Interestingly, the themes are woven together in a manner reminiscent of voices in a fugue.

This https://arxiv.org/abs/2311.05382 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Real time holography for higher spin theories
Real time holography is studied in the context of the embedding space formalism. In the first part of this paper, we present matching conditions for on-shell integer spin fields when going from Euclidean to Lorentzian signature on AdS background. Using the BTZ black hole as an example, we discuss various ways of lifting the physical solution from the AdS surface to the whole embedding space. The BTZ propagator for higher spin field is expressed elegantly in terms of the embedding coordinates. I…

Tunable linear-optical phase amplification
Christopher R. Schwarze, David S. Simon, Abdoulaye Ndao, Alexander V. Sergienko
https://arxiv.org/abs/2405.03868

Tunable linear-optical phase amplification
We combine lossless, phase-only transformations with fully-transmitting linear-optical scatterers to define the principle of linear-optical phase amplification. This enables a physical phase shift $ϕ$ to be nonlinearly mapped to a new space $γ(ϕ)$ using linear optics, resulting in a completely general and enhanced phase shifter that can replace any standard one. A particular phase amplifier is experimentally realized, allowing the phase enhancement parameter $dγ/dϕ$ to be continuously tune…

Magnetic filaments: formation, stability, and feedback
Evgeny A. Kuznetsov, Evgeny A. Mikhailov
https://arxiv.org/abs/2402.16989 https://

Magnetic filaments: formation, stability, and feedback
As well known, magnetic fields in space are distributed very inhomogeneously. Some-times field distributions have forms of filaments with high magnetic field values. As many ob-servations show, such a filamentation takes place in convective cells in the Sun and other astro-physical objects. This effect is associated with the frozenness of the magnetic field into a medium with high conductivity that leads to compression of magnetic field lines and forming magnetic filaments. We show analytically…

Null Infinity as a Weakly Isolated Horizon
Abhay Ashtekar, Simone Speziale
https://arxiv.org/abs/2402.17977 https://arxiv.org/pdf/240…

Null Infinity as a Weakly Isolated Horizon
Null infinity (Scri) arises as a boundary of the Penrose conformal completion of an asymptotically flat physical space-time. We first note that Scri is a weakly isolated horizon (WIH), and then show that its familiar properties can be derived from the general WIH framework. This seems quite surprising because physics associated with black hole (and cosmological) WIHs is very different from that extracted at Scri. We show that these differences can be directly traced back to the fact that Scri i…

The first measurements of carbon isotopic ratios in post-RGB stars: SZ Mon and DF Cyg. E-iSpec: A spectral analysis tool to derive elemental abundances and isotopic ratios for evolved stars
Maksym Mohorian (School of Mathematical and Physical Sciences, Macquarie University, Sydney, NSW, Australia, Astrophysics and Space Technologies Research Centre, Macquarie University, Sydney, NSW, Australia), Devika Kamath (School of Mathematical and Physical Sciences, Macquarie University, Sydney, …

The first measurements of carbon isotopic ratios in post-RGB stars: SZ Mon and DF Cyg. E-iSpec: A spectral analysis tool to derive elemental abundances and isotopic ratios for evolved stars
Dusty post-red giant branch (post-RGB) stars are low- and intermediate-mass stars where the RGB evolution was prematurely terminated by a poorly understood binary interaction. These binary stars are considered to be low-luminosity analogues of post-asymptotic giant branch (post-AGB) binary stars. In this study, we investigated the chemical composition of two dusty post-RGB binary stars, SZ Mon and DF Cyg, using multi-wavelength spectroscopic data from HERMES/Mercator (optical) and the APOGEE su…

Gradient Properties of Perturbative Multiscalar RG Flows to Six Loops
William H. Pannell, Andreas Stergiou
https://arxiv.org/abs/2402.17817 https://…

Gradient Properties of Perturbative Multiscalar RG Flows to Six Loops
The gradient property of the renormalisation group (RG) flow of multiscalar theories is examined perturbatively in $d=4$ and $d=4-\varepsilon$ dimensions. Such theories undergo RG flows in the space of quartic couplings $λ^I$. Starting at five loops, the relevant vector field that determines the physical RG flow is not the beta function traditionally computed in a minimal subtraction scheme in dimensional regularisation, but a suitable modification of it, the $B$ function. It is found that up …

This https://arxiv.org/abs/2402.11016 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Holographic phenomenology via overlapping degrees of freedom
The holographic principle suggests that regions of space contain fewer physical degrees of freedom than would be implied by conventional quantum field theory. Meanwhile, in Hilbert spaces of large dimension $2^n$, it is possible to define $N \gg n$ Pauli algebras that are nearly anti-commuting (but not quite) and which can be thought of as "overlapping degrees of freedom". We propose to model the phenomenology of holographic theories by allowing field-theory modes to be overlapping, and derive …

This https://arxiv.org/abs/2312.13384 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Weyl quadratic gravity as a gauge theory and non-metricity vs torsion duality
We review (non-supersymmetric) gauge theories of four-dimensional space-time symmetries and their quadratic action. The only true gauge theory of such a symmetry (with a physical gauge boson) that has an exact geometric interpretation, generates Einstein gravity in its spontaneously broken phase and is anomaly-free, is that of Weyl gauge symmetry (of dilatations). Gauging the full conformal group does not generate a true gauge theory of physical (dynamical) associated gauge bosons. Regarding th…