Tootfinder

Occurrence of the collective Ziman limit of heat transport in cubic semiconductors: scattering channels and size effects
Jelena Sjakste, Maxime Markov, Raja Sen, Lorenzo Paulatto, Nathalie Vast
https://arxiv.org/abs/2404.02553

Occurrence of the collective Ziman limit of heat transport in cubic semiconductors: scattering channels and size effects
In this work, we discuss the possibility of reaching the Ziman conditions for collective heat transport in cubic bulk semiconductors, such as Si, Ge, AlAs and AlP. In natural and enriched silicon and germanium, the collective heat transport limit is impossible to reach due to strong isotopic scattering. However, we show that in hyperenriched silicon and germanium, as well as in materials with one single stable isotope like AlAs and AlP, at low temperatures, normal scattering plays an important …

Occurrence of the collective Ziman limit of heat transport in cubic semiconductors: scattering channels and size effects
Jelena Sjakste, Maxime Markov, Raja Sen, Lorenzo Paulatto, Nathalie Vast
https://arxiv.org/abs/2404.02553

Occurrence of the collective Ziman limit of heat transport in cubic semiconductors: scattering channels and size effects
In this work, we discuss the possibility of reaching the Ziman conditions for collective heat transport in cubic bulk semiconductors, such as Si, Ge, AlAs and AlP. In natural and enriched silicon and germanium, the collective heat transport limit is impossible to reach due to strong isotopic scattering. However, we show that in hyperenriched silicon and germanium, as well as in materials with one single stable isotope like AlAs and AlP, at low temperatures, normal scattering plays an important …

Start the week well with an easy pledge to make.
Increase the value of diamond open access venues to the community by pledging to submit work to such a venue in the next 5 years.
Supporting a collective action for #CognitiveScience, #psychology,

'A change is coming — young people now want to unionise'
#JoinAUnion #Ireland

Extreme plasmons
Aakash A. Sahai
https://arxiv.org/abs/2404.02087 https://arxiv.org/pdf/2404.02087

Extreme plasmons
Nanosciences largely rely on plasmons which are quasiparticles constituted by collective oscillations of quantum electron gas composed of conduction band electrons that occupy discrete quantum states. Our work has introduced non-perturbative plasmons with oscillation amplitudes that approach the extreme limit set by breakdown in characteristic coherence. In contrast, conventional plasmons are small-amplitude oscillations. Controlled excitation of extreme plasmons modeled in our work unleashes u…

Statistical mechanics and pressure of composite multimoded weakly nonlinear optical systems
Nikolaos K. Efremidis, Demetrios N. Christodoulides
https://arxiv.org/abs/2404.02745

Statistical mechanics and pressure of composite multimoded weakly nonlinear optical systems
Statistical mechanics can provide a versatile theoretical framework for investigating the collective dynamics of weakly nonlinear waves-settings that can be utterly complex to describe otherwise. In optics, composite systems arise due to interactions between different frequencies and/or polarizations. The purpose of this work is to develop a thermodynamic theory that takes into account the synergistic action of multiple components. We find that the type of the nonlinearity involved can have imp…

"UN member states are meeting to plan how to tackle the world’s environmental crises"
#UN #UnitedNations #Environment

UN member states are meeting to plan how to tackle the world's environmental crises
Talks to shape global environmental policy started on Monday in Nairobi, where governments, civil society groups, scientists and the private sector met to plan collective environmental action. The meeting in Nairobi is the sixth session of the U.N. Environment Assembly, the world’s top decision-making body on the environment. This year, it’s focusing on how governments can work together to tackle environmental crises such as climate change, pollution and loss of biodiversity. Countries will…

The Bodleian Libraries BODcasts: "We Rise (Together): Taking and Making Space for BIPOC Book Arts Creatives, Cultures, and Histories" https://podcasts.ox.ac.uk/we-rise-together-taking-and-making-space-bipoc-bo…

I was just looking at the #collective tag to see if there's any design/development collectives, doing important work in an ethically aligned direction.
It's something I've wanted to be a part of for a while. My work is 100% remote/distributed already and I strongly believe that I have the experience to make me valuable. If I had the confidence to do so, I would build my own colle…

Collective schedules: axioms and algorithms
Martin Durand, Fanny Pascual
https://arxiv.org/abs/2403.18642 https://arxiv.org/pdf/2403.…

Collective schedules: axioms and algorithms
The collective schedules problem consists in computing a schedule of tasks shared between individuals. Tasks may have different duration, and individuals have preferences over the order of the shared tasks. This problem has numerous applications since tasks may model public infrastructure projects, events taking place in a shared room, or work done by co-workers. Our aim is, given the preferred schedules of individuals (voters), to return a consensus schedule. We propose an axiomatic study of t…

This https://arxiv.org/abs/2404.18709 has been replaced.
link: https://scholar.google.com/scholar?q=a

Three-state Opinion Dynamics for Financial Markets on Complex Networks
This work investigates the effects of complex networks on the collective behavior of a three-state opinion formation model in economic systems. Our model considers two distinct types of investors in financial markets: noise traders and fundamentalists. Financial states evolve via probabilistic dynamics that include economic strategies with local and global influences. The local majoritarian opinion drives noise traders' market behavior, while the market index influences the financial decisions …

This https://arxiv.org/abs/2305.06942 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csDC_…

Optimizing Distributed ML Communication with Fused Computation-Collective Operations
In order to satisfy their ever increasing capacity and compute requirements, machine learning models are distributed across multiple nodes using numerous parallelism strategies. As a result, collective communications are often on the critical path, and hiding their latency by overlapping kernel-granular communication and computation is difficult due to the absence of independent computation. In this work, we propose fusing computation with dependent collective communication by leveraging GPUs' …

The last days I have been trying to make a nextcloud for my promoter collective and wow, is it complicated if you're used to using Trello, G-Docs etc. Hope it's worth the work.

Disentangling the development of collective flow in high energy proton proton collisions with a multiphase transport model
Liang Zheng, Lian Liu, Zi-Wei Lin, Qi-Ye Shou, Zhong-Bao Yin
https://arxiv.org/abs/2404.18829

Disentangling the development of collective flow in high energy proton proton collisions with a multiphase transport model
In this work, we investigate the collective flow development in high energy proton proton (pp) collisions with a multiphase transport model (AMPT) based on PYTHIA8 initial conditions with a sub-nucleon structure. It is found that the PYTHIA8 based AMPT model can reasonably describe both the charged hadron productions and elliptic flow experimental data measured in pp collisions at $\sqrt{s}=13$ TeV. By turning on the parton and hadron rescatterings in AMPT separately, we find that the observed …

Three-state Opinion Dynamics for Financial Markets on Complex Networks
Bernardo J. Zubillaga, Mateus F. B. Granha, Andr\'e L. M. Vilela, Chao Wang, Kenric P. Nelson, H. Eugene Stanley
https://arxiv.org/abs/2404.18709

Three-state Opinion Dynamics for Financial Markets on Complex Networks
This work investigates the effects of complex networks on the collective behavior of a three-state opinion formation model in economic systems. Our model considers two distinct types of investors in financial markets: noise traders and fundamentalists. Financial states evolve via probabilistic dynamics that include economic strategies with local and global influences. The local majoritarian opinion drives noise traders' market behavior, while the market index influences the financial decisions …

This https://arxiv.org/abs/2404.18709 has been replaced.
link: https://scholar.google.com/scholar?q=a

Three-state Opinion Dynamics for Financial Markets on Complex Networks
This work investigates the effects of complex networks on the collective behavior of a three-state opinion formation model in economic systems. Our model considers two distinct types of investors in financial markets: noise traders and fundamentalists. Financial states evolve via probabilistic dynamics that include economic strategies with local and global influences. The local majoritarian opinion drives noise traders' market behavior, while the market index influences the financial decisions …

Tunable Collective Excitations in Epitaxial Perovskite Nickelates
Mengxia Sun, Xu He, Mingyao Chen, Chi Sin Tang, Xiongfang Liu, Liang Dai, Jishan Liu, Zhigang Zeng, Shuo Sun, Mark B. H. Breese, Chuanbing Cai, Yingge Du, Le Wang, Andrew T. S. Wee, Xinmao Yin
https://arxiv.org/abs/2404.19193<…

Tunable Collective Excitations in Epitaxial Perovskite Nickelates
The formation of plasmons through the collective excitation of charge density has generated intense discussions, offering insights to fundamental sciences and potential applications. While the underlying physical principles have been well-established, the effects of multibody interactions and orbital hybridization on plasmonic dynamics remain understudied. In this work, we present the observation of conventional metallic and correlated plasmons in epitaxial La1-xSrxNiO3 (LSNO) films with varyin…

Long-lived collective Rydberg excitations in atomic gas achieved via ac-Stark lattice modulation
Stanis{\l}aw Kurzyna, Bartosz Niewelt, Mateusz Mazelanik, Wojciech Wasilewski, Micha{\l} Parniak
https://arxiv.org/abs/2402.06513

Long-lived collective Rydberg excitations in atomic gas achieved via ac-Stark lattice modulation
Collective Rydberg excitations provide promising applications ranging from quantum information processing, and quantum computing to ultra-sensitive electrometry. However, their short lifetime is an immense obstacle in real-life scenarios. The state-of-the-art methods of prolonging the lifetime were only implemented for ground-state quantum memories and would require a redesign to effectively work on different atomic transitions. We propose a protocol for extending the Rydberg excitation lifetim…

Optimal control of collective electrotaxis in epithelial monolayers
Simon F. Martina-Perez, Isaac B. Breinyn, Daniel J. Cohen, Ruth E. Baker
https://arxiv.org/abs/2402.08700

Optimal control of collective electrotaxis in epithelial monolayers
Epithelial monolayers are some of the best-studied models for collective cell migration due to their abundance in multicellular systems and their tractability. Experimentally, the collective migration of epithelial monolayers can be robustly steered e.g. using electric fields, via a process termed electrotaxis. Theoretically, however, the question of how to design an electric field to achieve a desired spatiotemporal movement pattern is underexplored. In this work, we construct and calibrate an…

This https://arxiv.org/abs/2404.17788 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Reconfigurable collective resonances induced by liquid crystals in dielectric metasurfaces
Dielectric metasurfaces can show multi-resonant response with high Q-factors in the visible range due to multipole coupling. This work suggests that these collective resonances in all-dielectric metasurfaces can be modified if adjacent to an anisotropic liquid crystal medium, opening a new path toward the dynamic metasurface effects. Using numerical full-wave simulations and the multipole decomposition technique for reflection and transmission coefficients we study the influence of the surround…

Tim Berners-Lee: Marking the Web’s 35th Birthday.
"Call For Action
Realising this emergent movement won’t just happen - it requires support for the people leading the reform, from researchers to inventors to advocates. We must amplify and promote these positive use cases, and work to shift the collective mindset of global citizens."

Marking the Web’s 35th Birthday: An Open Letter - Tim Berners-Lee - Medium
Three and a half decades ago, when I invented the web, its trajectory was impossible to imagine. There was no roadmap to predict the course of its evolution, it was a captivating odyssey filled with…

Optimal Budget Aggregation with Single-Peaked Preferences
Felix Brandt, Matthias Greger, Erel Segal-Halevi, Warut Suksompong
https://arxiv.org/abs/2402.15904

Optimal Budget Aggregation with Single-Peaked Preferences
We study the problem of aggregating distributions, such as budget proposals, into a collective distribution. An ideal aggregation mechanism would be Pareto efficient, strategyproof, and fair. Most previous work assumes that agents evaluate budgets according to the $\ell_1$ distance to their ideal budget. We investigate and compare different models from the larger class of star-shaped utility functions - a multi-dimensional generalization of single-peaked preferences. For the case of two alterna…

This https://arxiv.org/abs/2312.03221 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Random walk models for the propagation of signalling molecules in one-dimensional spatial networks and their continuum limit
The propagation of signalling molecules within cellular networks is affected by network topology, but also by the spatial arrangement of cells in the networks. Understanding the collective reaction--diffusion behaviour in space of signals propagating through cellular networks is an important consideration for example for regenerative signals that convey positional information. In this work, we consider stochastic and deterministic versions of random walk models of signalling molecules propagati…

Slept so bad and little tonight that I just managed to accidently close my browser on an almost finished newsletter I was writing for my promoter collective. An hour's work just turned into two. 😭

This https://arxiv.org/abs/2301.07162 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Doping-dependent charge- and spin-density wave orderings in a monolayer of Pb adatoms on Si(111)
In this work we computed the phase diagram as a function of temperature and doping for a system of lead adatoms allocated periodically on a silicon (111) surface. This Si(111):Pb material is characterized by a strong and long-ranged Coulomb interaction, a relatively large value of the spin-orbit coupling, and a structural phase transition that occurs at low temperature. In order to describe the collective electronic behavior in the system, we perform many-body calculations consistently taking a…

Group cohesion and passive dynamics of a pair of inertial swimmers with three-dimensional hydrodynamic interactions
Mohamed Niged Mabrouk, Daniel Floryan
https://arxiv.org/abs/2404.13152

Group cohesion and passive dynamics of a pair of inertial swimmers with three-dimensional hydrodynamic interactions
When swimming animals form cohesive groups, they can reap several benefits. Our understanding of collective animal motion has traditionally been driven by models based on phenomenological behavioral rules, but more recent work has highlighted the critical importance of hydrodynamic interactions among a group of inertial swimmers. To study how hydrodynamic interactions affect group cohesion, we develop a three-dimensional, inviscid, far-field model of a swimmer. In a group of two model swimmers,…

Analyzing Data Augmentation for Medical Images: A Case Study in Ultrasound Images
Adam Tupper, Christian Gagn\'e
https://arxiv.org/abs/2403.09828 https…

Analyzing Data Augmentation for Medical Images: A Case Study in Ultrasound Images
Data augmentation is one of the most effective techniques to improve the generalization performance of deep neural networks. Yet, despite often facing limited data availability in medical image analysis, it is frequently underutilized. This appears to be due to a gap in our collective understanding of the efficacy of different augmentation techniques across medical imaging tasks and modalities. One domain where this is especially true is breast ultrasound images. This work addresses this issue …

This https://arxiv.org/abs/2402.06513 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Long-lived collective Rydberg excitations in atomic gas achieved via ac-Stark lattice modulation
Collective Rydberg excitations provide promising applications ranging from quantum information processing, and quantum computing to ultra-sensitive electrometry. However, their short lifetime is an immense obstacle in real-life scenarios. The state-of-the-art methods of prolonging the lifetime were mainly implemented for ground-state quantum memories and would require a redesign to effectively work on different atomic transitions. We propose a protocol for extending the Rydberg excitation lifet…

Electrochemical Communication in Bacterial Biofilms: A Study on Potassium Stimulation and Signal Transmission
Nithin V. Sabu, Bige Deniz Unluturk
https://arxiv.org/abs/2403.08926 …

Electrochemical Communication in Bacterial Biofilms: A Study on Potassium Stimulation and Signal Transmission
Electrochemical communication is a mechanism that enables intercellular interaction among bacteria within communities. Bacteria achieves synchronization and coordinates collective actions at the population level through the utilization of electrochemical signals. In this work, we investigate the response of bacterial biofilms to artificial potassium concentration stimulation. We introduce signal inputs at a specific location within the biofilm and observe their transmission to other regions, fa…

This https://arxiv.org/abs/2310.19448 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The Astrophysical Gravitational Wave Background in the mHz band is likely dominated by White Dwarf binaries
Context. The Astrophysical Gravitational Wave Background (AGWB) is a collective signal of astrophysical gravitational wave sources and is dominated by compact binaries. Its measurement is one of the science goals of current and future gravitational wave detectors. Aims. We aim to determine what population of compact binaries dominates the AGWB in the mHz band. Methods. We revisit and update earlier work by Farmer & Phinney (2003) to model the astrophysical gravitational wave background sourced …

Feint in Multi-Player Games
Junyu Liu, Wangkai Jin, Xiangjun Peng
https://arxiv.org/abs/2403.07932 https://arxiv.org/pdf/2403.07932…

Feint in Multi-Player Games
This paper introduces the first formalization, implementation and quantitative evaluation of Feint in Multi-Player Games. Our work first formalizes Feint from the perspective of Multi-Player Games, in terms of the temporal, spatial, and their collective impacts. The formalization is built upon Non-transitive Active Markov Game Model, where Feint can have a considerable amount of impacts. Then, our work considers practical implementation details of Feint in Multi-Player Games, under the state-of…

This https://arxiv.org/abs/2310.05554 has been replaced.
link: https://scholar.google.com/scholar?q=a

Collective motion in a sheet of microswimmers
Self-propelled micron-size particles suspended in a fluid, like bacteria or synthetic microswimmers, are strongly non-equilibrium systems where particle motility breaks the microscopic detailed balance, often resulting in large-scale collective motion. Previous theoretical work has identified long-range hydrodynamic interactions as the main driver of collective motion in unbounded dilute suspension of rear-actuated ("pusher") microswimmers. In contrast, most experimental studies of collective m…

This https://arxiv.org/abs/2402.09037 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Metasurface of strongly coupled excitons and nanoplasmonic arrays
Metasurfaces allow to manipulate light at the nanoscale. Integrating metasurfaces with transition metal dichalcogenide monolayers provides additional functionality to ultrathin optics, including tunable optical properties with enhanced light-matter interactions. In this work, we demonstrate the realization of a polaritonic metasurface utilizing the sizable light-matter coupling of excitons in monolayer WSe2 and the collective lattice resonances of nanoplasmonic gold arrays. To this end, we deve…

Exploring the Interplay of Excitatory and Inhibitory Interactions in the Kuramoto Model on Circle Topologies
Albert D\'iaz-Guilera, Dimitri Marinelli, Conrad J. P\'erez-Vicente
https://arxiv.org/abs/2402.12481

Exploring the Interplay of Excitatory and Inhibitory Interactions in the Kuramoto Model on Circle Topologies
In the field of collective dynamics, the Kuramoto model serves as a benchmark for the investigation of synchronization phenomena. While mean-field approaches and complex networks have been widely studied, the simple topology of a circle is still relatively unexplored, especially in the context of excitatory and inhibitory interactions. In this work, we focus on the dynamics of the Kuramoto model on a circle with positive and negative connections paying attention to the existence of new attracto…

Feint in Multi-Player Games
Junyu Liu, Wangkai Jin, Xiangjun Peng
https://arxiv.org/abs/2403.07932 https://arxiv.org/pdf/2403.07932…

Feint in Multi-Player Games
This paper introduces the first formalization, implementation and quantitative evaluation of Feint in Multi-Player Games. Our work first formalizes Feint from the perspective of Multi-Player Games, in terms of the temporal, spatial, and their collective impacts. The formalization is built upon Non-transitive Active Markov Game Model, where Feint can have a considerable amount of impacts. Then, our work considers practical implementation details of Feint in Multi-Player Games, under the state-of…

The axially-deformed relativistic quasiparticle random phase approximation based on point-coupling interactions
A. Ravli\'c, T. Nik\v{s}i\'c, Y. F. Niu, P. Ring, N. Paar
https://arxiv.org/abs/2404.13266

The axially-deformed relativistic quasiparticle random phase approximation based on point-coupling interactions
Collective nuclear excitations, like giant resonances, are sensitive to nuclear deformation, as evidenced by alterations in their excitation energies and transition strength distributions. A common theoretical framework to study these collective modes, the random-phase approximation (RPA), has to deal with large dimensions spanned by all possible particle-hole configurations satisfying certain symmetries. This work aims to establish a new theoretical framework to study the impact of deformation…

Good rates from bad coordinates: the exponential average time-dependent rate approach
Nicodemo Mazzaferro, Subarna Sasmal, Pilar Cossio, Glen M. Hocky
https://arxiv.org/abs/2403.10668

Good rates from bad coordinates: the exponential average time-dependent rate approach
Our ability to calculate rates of biochemical processes using molecular dynamics simulations is severely limited by the fact that the time scales for reactions, or changes in conformational state, scale exponentially with the relevant free-energy barriers. In this work, we improve upon a recently proposed rate estimator that allows us to predict transition times with molecular dynamics simulations biased to rapidly explore one or several collective variables. This approach relies on the idea th…

Phononic bright and dark states: Investigating multi-mode light-matter interactions with a single trapped ion
Harry Parke, Robin Thomm, Alan C. Santos, Andr\'e Cidrim, Gerard Higgins, Marion Mallweger, Natalia Kuk, Shalina Salim, Romain Bachelard, Celso J. Villas-Boas, Markus Hennrich
https://arxiv.org/abs/2403.07154<…

Phononic bright and dark states: Investigating multi-mode light-matter interactions with a single trapped ion
Interference underpins some of the most practical and impactful properties of both the classical and quantum worlds. In this work we experimentally investigate a new formalism to describe interference effects, based on collective states which have enhanced or suppressed coupling to a two-level system. We employ a single trapped ion, whose electronic state is coupled to two of the ion's motional modes in order to simulate a multi-mode light-matter interaction. We observe the emergence of phononi…

This https://arxiv.org/abs/2306.11240 has been replaced.
initial toot: https://mastoxiv.page/@a…

Spin-orbit interaction enabled electronic Raman scattering from charge collective modes
Electronic Raman scattering in the fully symmetric channel couples to the charge excitations in the system, including the plasmons. However, the plasmon response has a spectral weight of $\sim q^2$, where $q$, the momentum transferred by light, is small. In this work, we show that in inversion symmetry broken systems where Rashba type spin-orbit coupling affects the states at the Fermi energy (which is a known low energy effect) as well as the transition elements to other states (a high energy …

This https://arxiv.org/abs/2311.09983 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Charge Density Wave Ordering in NdNiO$_2$: Effects of Multiorbital Nonlocal Correlations
In this work, we investigate collective electronic fluctuations and, in particular, the possibility of the charge density wave ordering in an infinite-layer NdNiO$_2$. We perform advanced many-body calculations for the ab-initio three-orbital model by taking into account local correlation effects, non-local charge and magnetic fluctuations, and the electron-phonon coupling. We find that in the considered material, electronic correlations are strongly orbital- and momentum-dependent. Notably, th…

This https://arxiv.org/abs/2312.03221 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Random walk models for the propagation of signalling molecules in one-dimensional spatial networks and their continuum limit
The propagation of signalling molecules within cellular networks is affected by network topology, but also by the spatial arrangement of cells in the networks. Understanding the collective reaction--diffusion behaviour in space of signals propagating through cellular networks is an important consideration for example for regenerative signals that convey positional information. In this work, we consider stochastic and deterministic versions of random walk models of signalling molecules propagati…