On the partial Π-property of some subgroups of prime power order
of finite groups
April 25, 2023
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Mathematics
Group Theory
Let H be a subgroup of a finite group G. We say that H satisfies
the partial Π-property in G if if there exists a chief series ΓG:1=G0<G1<⋅⋅⋅<Gn=G of G such
that for eve...
X-ray Polarization of the Black Hole X-ray Binary 4U 1630-47 Challenges
Standard Thin Accretion Disk Scenario
April 25, 2023
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Physics
High Energy Astrophysical Phenomena
Large energy-dependent X-ray polarization degree is detected by the Imaging
X-ray Polarimetry Explorer ({IXPE}) in the high-soft emission state of the
black hole X-ray binary 4U 1630--47. The highly significant detection (at
$\approx50\sigm...
Parsing skin effect in a non-Hermitian spinless BHZ-like model
April 25, 2023
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Physics
Mesoscale and Nanoscale Physics
Disordered Systems and Neural Networks
Quantum Physics
This work comprehensively investigates the non-Hermitian skin effect (NHSE)
in a spinless Bernevig-Hughes-Zhang (BHZ)-like model in one dimension. It is
generally believed that a system with non-reciprocal hopping amplitudes
demonstrates NH...
Aharonov-Bohm effect for confined matter in lattice gauge theories
April 25, 2023
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Physics
Quantum Physics
High Energy Physics - Lattice
Mesoscale and Nanoscale Physics
Quantum Gases
Gauge theories arise in physical systems displaying space-time local
symmetries. They provide a powerful description of important realms of physics
ranging from fundamental interactions, to statistical mechanics, condensed
matter and more r...
Dynamical complexity in micro-scale disk-wind systems
April 25, 2023
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Physics
Astrophysics of Galaxies
Adaptation and Self-Organizing Systems
Powerful winds at accretion-disk scales have been observed in the past 20
years in many AGN. These are the so-called ultrafast outflows (UFOs). Outflows
are intimately related to mass accretion through the conservation of angular
momentum, ...
Partially Observable Mean Field Multi-Agent Reinforcement Learning Based
on Graph-Attention
April 25, 2023
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Computer Science
Artificial Intelligence
Traditional multi-agent reinforcement learning algorithms are difficultly
applied in a large-scale multi-agent environment. The introduction of mean
field theory has enhanced the scalability of multi-agent reinforcement learning
in recent y...
Quantum simulation of hadronic states with Rydberg-dressed atoms
April 25, 2023
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Physics
Quantum Physics
Atomic Physics
Quantum Gases
The phenomenon of confinement is well known in high-energy physics and can
also be realized for low-energy domain-wall excitations in one-dimensional
quantum spin chains. A bound state consisting of two domain-walls can behave
like a meson,...
KK- and E-theory via homotopy theory
April 25, 2023
Mathematics
K-Theory and Homology
Algebraic Topology
Operator Algebras
We provide a homotopy theorist's point of view on KK- and E-theory for
C∗-algebras. We construct stable ∞-categories representing these
theories through a sequence of Dwyer-Kan localizations of the category of
C∗-algebr...
Harnessing Deep Learning and HPC Kernels via High-Level Loop and Tensor
Abstractions on CPU Architectures
April 25, 2023
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Computer Science
Distributed, Parallel, and Cluster Computing
Artificial Intelligence
During the past decade, Deep Learning (DL) algorithms, programming systems
and hardware have converged with the High Performance Computing (HPC)
counterparts. Nevertheless, the programming methodology of DL and HPC systems
is stagnant, rely...
A novel iterative time integration scheme for linear poroelasticity
April 24, 2023
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Mathematics
Computer Science
Numerical Analysis
Numerical Analysis
Numerical Analysis
Numerical Analysis
Within this paper, we introduce and analyze a novel time stepping scheme for
linear poroelasticity. In each time frame, we iteratively solve the flow and
mechanics equations with an additional damping step for the pressure variable.
Dependi...