Tootfinder

Flow-Acoustics: Theory and Benchmarking
Stefan Schoder
https://arxiv.org/abs/2404.10634 https://arxiv.org/pdf/2404.10634

Flow-Acoustics: Theory and Benchmarking
The urgent need for transitioning to green energy solutions, particularly in the context of house heating and urban redensification, has brought the issue of fan noise aeroacoustics investigations to the forefront. As societies worldwide strive to mitigate climate change and reduce carbon emissions, adopting sustainable heating technologies such as air heat pumps has gained significant traction. In Germany, renowned for its commitment to environmental sustainability, the "TA Lärm" regulations,…

Does anyone have a pointer on Social Practice theory of infrastructure change under social pressure? Books or articles? Maybe?

This https://arxiv.org/abs/2309.06488 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Operationally independent events can influence each other in quantum theory
In any known description of nature, two physical systems are considered independent of each other if any action on one of the systems does not change the other system. From our classical intuitions about the world, we further conclude that these two systems are not affecting each other in any possible way, and thus these two systems are causally disconnected or they do not influence each other. Building on this idea, we show that in quantum theory such a notion of classical independence is not …

Flow-Acoustics: Theory and Benchmarking
Stefan Schoder
https://arxiv.org/abs/2404.10634 https://arxiv.org/pdf/2404.10634

Flow-Acoustics: Theory and Benchmarking
The urgent need for transitioning to green energy solutions, particularly in the context of house heating and urban redensification, has brought the issue of fan noise aeroacoustics investigations to the forefront. As societies worldwide strive to mitigate climate change and reduce carbon emissions, adopting sustainable heating technologies such as air heat pumps has gained significant traction. In Germany, renowned for its commitment to environmental sustainability, the "TA Lärm" regulations,…

Structure Phase Change Induced by Nonequilibrium Effects in Molecular Scale Junctions
Hao Wang, Kah-Meng Yam, Zhuoling Jiang, Na Guo, Chun Zhang
https://arxiv.org/abs/2406.08729 <…

Structure Phase Change Induced by Nonequilibrium Effects in Molecular Scale Junctions
The interrelationship between a material's structure and its properties lies at the heart of materials-related research. Finding how the changes of one affect the other is of primary importance in theoretical and computational materials studies. In this work, based on Hershfield nonequilibrium quantum statistics and the mean-field approach with steady-state density functional theory, we derive a first-principles method to calculate nonequilibrium effects induced forces acting on atoms, enabling…

This https://arxiv.org/abs/2309.06488 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Operationally independent events can influence each other in quantum theory
In any known description of nature, two physical systems are considered independent of each other if any action on one of the systems does not change the other system. From our classical intuitions about the world, we further conclude that these two systems are not affecting each other in any possible way, and thus these two systems are causally disconnected or they do not influence each other. Building on this idea, we show that in quantum theory such a notion of classical independence is not …

Nearby cycles at infinity as a triangulated functor
Khoa Bang Pham
https://arxiv.org/abs/2404.07910 https://arxiv.org/pdf/2404.07910<…

Nearby cycles at infinity as a triangulated functor
Let $k$ be a field and $g \colon Y \longrightarrow X$, $f \colon X \longrightarrow \mathbb{A}_k^1$ be morphisms of quasi-projective $k$-varieties. In his thesis, Ayoub developed the theory of motivic nearby cycles functors $Ψ_{f},Ψ_{f \circ g}$. They are equipped with several base change morphisms such as $μ_g \colon g_{σ!}Ψ_{f \circ g} \longrightarrow Ψ_f g_{η!}$, $ν_g\colon Ψ_{f \circ g}g_η^! \longrightarrow g_σ^!Ψ_f$, which are isomorphisms if $g$ is projective and smooth, respec…

Thermally activated intermittent flow in amorphous solids
Daniel J. Korchinski, J\"org Rottler
https://arxiv.org/abs/2404.08220 https://

Thermally activated intermittent flow in amorphous solids
Using mean field theory and a mesoscale elastoplastic model, we analyze the steady state shear rheology of thermally activated amorphous solids. At sufficiently high temperature and driving rates, flow is continuous and described by well-established rheological flow laws such as Herschel-Bulkley and logarithmic rate dependence. However, we find that these flow laws change in the regime of intermittent flow, were collective events no longer overlap and serrated flow becomes pronounced. In this r…

This https://arxiv.org/abs/2306.13758 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Neutron Stars In $f(R,T)$ Theory: Slow Rotation Approximation
In this paper, we study the slowly rotating neutron stars in $f(R, T)$ gravity based on Hartle-Thorne formalism. We first consider the simplest matter-geometry coupled modified gravity, namely $f(R, T)=R+2χT$. We compute the mass, radius, moment of inertia, change in radius, and binding energy due to rotation, eccentricity, quadrupole moment, and the tidal love number. The quantities, which are of the second order in angular velocity, like change in radius and binding energy due to rotation, e…

This https://arxiv.org/abs/2006.00554 has been replaced.
link: https://scholar.google.com/scholar?q=a

Twisted Quasi-elliptic cohomology and twisted equivariant elliptic cohomology
In this paper we construct a twisted version of quasi-elliptic cohomology. This theory can be constructed as a K-theory of a loop space. After establishing basic properties of the theory, including restriction, change-of-group and induction maps, we construct the Chern character map. And we compute the twisted quasi-elliptic cohomology theories of representation 4-spheres acted by the finite subgroups of SU(2), which, as conjectured by Sati and Schreiber, can produce good observables on M-brane…

Macdonald characters from a new formula for Macdonald polynomials
Houcine Ben Dali, Michele D'Adderio
https://arxiv.org/abs/2404.03904 https://<…

Macdonald characters from a new formula for Macdonald polynomials
We introduce a new operator $Γ$ on symmetric functions, which enables us to obtain a creation formula for Macdonald polynomials. This formula provides a connection between the theory of Macdonald operators initiated by Bergeron, Garsia, Haiman and Tesler, and shifted Macdonald polynomials introduced by Knop, Lassalle, Okounkov and Sahi. We use this formula to introduce a two-parameter generalization of Jack characters, which we call Macdonald characters. Finally, we provide a change of varia…

Nearby cycles at infinity as a triangulated functor
Khoa Bang Pham
https://arxiv.org/abs/2404.07910 https://arxiv.org/pdf/2404.07910<…

Nearby cycles at infinity as a triangulated functor
Let $k$ be a field and $g \colon Y \longrightarrow X$, $f \colon X \longrightarrow \mathbb{A}_k^1$ be morphisms of quasi-projective $k$-varieties. In his thesis, Ayoub developed the theory of motivic nearby cycles functors $Ψ_{f},Ψ_{f \circ g}$. They are equipped with several base change morphisms such as $μ_g \colon g_{σ!}Ψ_{f \circ g} \longrightarrow Ψ_f g_{η!}$, $ν_g\colon Ψ_{f \circ g}g_η^! \longrightarrow g_σ^!Ψ_f$, which are isomorphisms if $g$ is projective and smooth, respec…

If I could learn electric engineering for fun, or learn psychology so that I can build a more compassionate theory of ethical and humane line management, isn't it better for me and the world for me to learn psychology?
Learning psychology means I can more effectively change the things that produced burnout

Electricity at the macroscale and its microscopic origins
Paul Tangney
https://arxiv.org/abs/2403.13981 https://arxiv.org/pdf/2403.13…

Electricity at the macroscale and its microscopic origins
I define the fields that describe electrical macrostructure, and their rates of change, in terms of the microscopic charge density, electric field, electric potential, and their rates of change. To deduce these definitions, I lay some foundations of a general theory of structure homogenization, meaning a theory of how any observable macroscopic field is related to spatial averages of its microscopic counterpart. I apply homogenization theory to the fields that appear in the vacuum theory of e…

Computable conditions for order-2 $CP$ symmetry in NHDM potentials
R. Plantey, M. Aa. Solberg
https://arxiv.org/abs/2404.02004 https://

Computable conditions for order-2 $CP$ symmetry in NHDM potentials
We derive necessary and sufficient conditions for order-2 $CP$ ($CP2$) symmetry in $N$-Higgs-doublet potentials for $N>2$. The conditions, which are formulated as relations between vectors that transform under the adjoint representation of $\mathsf{SU}(N)$ under a change of doublet basis, are representation theoretical in nature. Making use of Lie algebra and representation theory we devise an efficient, computable algorithm which may be applied to decide whether or not a given numerical potent…

This https://arxiv.org/abs/2210.15148 has been replaced.
link: https://scholar.google.com/scholar?q=a

Ranking Edges by their Impact on the Spectral Complexity of Information Diffusion over Networks
Despite the numerous ways now available to quantify which parts or subsystems of a network are most important, there remains a lack of centrality measures that are related to the complexity of information flows and are derived directly from entropy measures. Here, we introduce a ranking of edges based on how each edge's removal would change a system's von Neumann entropy (VNE), which is a spectral-entropy measure that has been adapted from quantum information theory to quantify the complexity o…

This https://arxiv.org/abs/2401.00047 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Persistent gravitational wave observables: Nonlinearities in (non-)geodesic deviation
The usual gravitational wave memory effect can be understood as a change in the separation of two initially comoving observers due to a burst of gravitational waves. Over the past few decades, a wide variety of other, "persistent" observables which measure permanent effects on idealized detectors have been introduced, each probing distinct physical effects. These observables can be defined in (regions of) any spacetime where there exists a notion of radiation, such as perturbation theory off of…

This https://arxiv.org/abs/2210.15148 has been replaced.
link: https://scholar.google.com/scholar?q=a

Ranking Edges by their Impact on the Spectral Complexity of Information Diffusion over Networks
Despite the numerous ways now available to quantify which parts or subsystems of a network are most important, there remains a lack of centrality measures that are related to the complexity of information flows and are derived directly from entropy measures. Here, we introduce a ranking of edges based on how each edge's removal would change a system's von Neumann entropy (VNE), which is a spectral-entropy measure that has been adapted from quantum information theory to quantify the complexity o…

Extreme Elastic Deformation of Atoms and Pressure-Induced Superconductivity in Silicon
Xiaozhi Hu
https://arxiv.org/abs/2404.13932 https://

Extreme Elastic Deformation of Atoms and Pressure-Induced Superconductivity in Silicon
Change in the interatomic spacing of a two-atom system under tension and compression has been modelled by the elastic deformation of atoms. The critical elastic strain of atoms before separation or cracking from tension was estimated by the Griffith theory together with a recent mechanics model, then extended to the lateral elastic expansion under uniaxial compression. The hypothesis of deformable atoms has led to astonishing predictions of the critical elastic strain, around 10 and 20 percent …

Promoting collective cooperation through temporal interactions
Yao Meng, Alex McAvoy, Aming Li
https://arxiv.org/abs/2404.07530 https://

Promoting collective cooperation through temporal interactions
Collective cooperation drives the dynamics of many natural, social, and economic phenomena, making understanding the evolution of cooperation with evolutionary game theory a central question of modern science. Although human interactions are best described as complex networks, current explorations are limited to static networks where interactions represented by network links are permanent and do not change over time. In reality, human activities often involve temporal interactions, where links …

Electro-optic properties from ab initio calculations in two-dimensional materials
Zhijun Jiang, Hongjun Xiang, Laurent Bellaiche, Charles Paillard
https://arxiv.org/abs/2403.17987

Electro-optic properties from ab initio calculations in two-dimensional materials
Electro-optic (EO) effects relate the change of optical constants by low-frequency electric fields. Thanks to the advent of Density Functional Perturbation Theory (DFPT), the EO properties of bulk three-dimensional (3D) materials can now be calculated in an ab initio way. However, the use of periodic boundary conditions in most Density Functional Theory codes imposes to simulate two-dimensional (2D) materials using slabs surrounded by a large layer of vacuum. The EO coefficients predicted from …

This https://arxiv.org/abs/2402.00755 has been replaced.
link: https://scholar.google.com/scholar?q=a

$V_{lowk}$ Renormalization Group Flow, Vector Manifestation and Sound Velocity in Massive Compact Stars
The $V_{lowk}$-renormalization group approach on the surface of Fermi liquid for nuclear matter to which Tom Kuo made a pioneering contribution at Stony Brook is found to inject the pivotal input in the formulation of the generalized nuclear effective field theory with acronym ``G$n$EFT" applicable to superdense compact-star physics. A topology change in terms of skyrmions and half-skyrmions is shown to play the role of the ``putative" hadron-quark continuity (HQC)" conjectured in QCD. Cruciall…

This https://arxiv.org/abs/2404.09103 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Ion Correlation Induced Non-monotonic Height Change and Microphase Separation of Polyelectrolyte Brushes
Modeling ion correlations in inhomogeneous polymers and soft matters with spatially varying ionic strength or dielectric permittivity remains a great challenge. Here, we develop a new theory which systematically incorporates electrostatic fluctuations into the self-consistent field theory for polymers. Applied to polyelectrolyte brushes, the theory predicts that ion correlations induce non-monotonic change of the brush height: collapse followed by reexpansion. The scaling analysis elucidates th…

This https://arxiv.org/abs/2311.12776 has been replaced.
initial toot: https://mastoxiv.page/@a…

Polarization-driven band topology evolution in twisted MoTe$_2$ and WSe$_2$
Motivated by recent experimental observations of opposite Chern numbers in $R$-type twisted MoTe$_2$ and WSe$_2$ homobilayers, we perform large-scale density-functional-theory (DFT) calculations with machine learning force fields to investigate moiré band topology from large to small twist angles in both materials. We find that the Chern numbers of the moiré frontier bands change sign as a function of twist angle, and this change is driven by the competition between moiré ferroelectricity an…

🌍💡🔥 #ClimateJustice NOW! Experts are proposing a groundbreaking approach: trying fossil fuel firms for homicide over climate-related deaths. The devastating impact of their greed is no longer a debate—it's a lethal reality. 🚫💀 Each year, extreme weather claims 5 million lives, with countless others suffering from hunger, disease, and the wrath of nature. Yet, these companies have knowingly fueled the crisis, prioritizing profit over people and planet. 🌱💔
It's time to redefine accountability. Legal minds across the U.S. are rallying behind the idea that these corporations should face the consequences of their actions in court. This isn't just about legal theory; it's about moral obligation and the urgent need for systemic change. 💼👨‍⚖️✊
We stand at a crossroads: continue to let greed dictate our future or demand justice for millions affected. Let's support the shift towards holding the real culprits accountable and pave the way for a sustainable, equitable world. 🌎💚🤝 #ActNow #ClimateCrisis #OilyMoneyOut #StopFossilFuels
https://www.theguardian.com/us-news/2024/mar/21/fossil-fuel-companies-homicide-climate-deaths-lawsuit

Unveiling the crystallization kinetics in Ge-rich Ge$_x$Te alloys by large scale simulations with a machine-learned interatomic potential
Dario Baratella, Omar Abou El Kheir, Marco Bernasconi
https://arxiv.org/abs/2404.15128

Unveiling the crystallization kinetics in Ge-rich Ge$_x$Te alloys by large scale simulations with a machine-learned interatomic potential
A machine-learned interatomic potential for Ge-rich Ge$_x$Te alloys has been developed aiming at uncovering the kinetics of phase separation and crystallization in these materials. The results are of interest for the operation of embedded phase change memories which exploits Ge-enrichment of GeSbTe alloys to raise the crystallization temperature. The potential is generated by fitting a large database of energies and forces computed within Density Functional Theory with the neural network scheme…

This https://arxiv.org/abs/2307.02327 has been replaced.
initial toot: https://mastoxiv.page/@a…

Equivariant graph neural network interatomic potential for Green-Kubo thermal conductivity in phase change materials
Thermal conductivity is a fundamental material property that plays an essential role in technology, but its accurate evaluation presents a challenge for theory. In this work, we demonstrate the application of $E(3)$-equivariant neutral network interatomic potentials within Green-Kubo formalism to determine the lattice thermal conductivity in amorphous and crystalline materials. We apply this method to study the thermal conductivity of germanium telluride (GeTe) as a prototypical phase change ma…