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It is an attractive hypothesis that the spatial structure of visual cortical architecture can be explained by the coordinated optimization of multiple visual cortical maps representing orientation preference (OP), ocular dominance (OD),…

神经元与认知 · 定量生物学 2015-06-03 Lars Reichl , Dominik Heide , Siegrid Löwel , Justin C. Crowley , Matthias Kaschube , Fred Wolf

The size and structure of spatial molecular and atomic clustering can significantly impact material properties and is therefore important to accurately quantify. Ripley's K-function (K(r)), a measure of spatial correlation, can be used to…

材料科学 · 物理学 2020-11-26 Galen B. Vincent , Andrew P. Proudian , Jeramy D. Zimmerman

Thanks to the recent availability of large surveys, there has been renewed interest in third-order correlation statistics. Measures of third-order clustering are sensitive to the structure of filaments and voids in the universe and are…

天体物理学 · 物理学 2010-11-11 J. M. Loh

Combining galaxy clustering information from regions of different environmental densities can help break cosmological parameter degeneracies and access non-Gaussian information from the density field that is not readily captured by the…

The local number variance associated with a spherical sampling window of radius $R$ enables a classification of many-particle systems in $d$-dimensional Euclidean space according to the degree to which large-scale density fluctuations are…

统计力学 · 物理学 2021-05-12 Salvatore Torquato , Jaeuk Kim , Michael A. Klatt

Stochastic agent-based models can account for millions of cells with spatiotemporal movement that can be a function of different factors. However, these simulations can be computationally expensive. In this work, we develop a novel…

数值分析 · 数学 2019-09-11 Michael A. Yereniuk , Sarah D. Olson

Energy degeneracy in physical systems may be induced by symmetries of the Hamiltonian, and the resonance of degeneracy states in carbon nanostructures can effectively enhance the stability of the system. Combining the octet rule, we…

介观与纳米尺度物理 · 物理学 2025-04-18 Chang-Chun He , Shao-Gang Xu , Jiarui Zeng , Weijie Huang , Yao Yao , Yu-Jun Zhao , Hu Xu

We have considered the possibility to describe the astrophysical S-factors of some light atomic nuclei on the basis of the potential cluster model by taking into account the supermultiplet symmetry of wave functions and splitting the…

核理论 · 物理学 2010-05-12 S. B. Dubovichenko , A. V. Dzhazairov-Kakhramanov

An equilibrium theory of classical fluids based on the space distribution among the particles is derived in the framework of the energy minimization method. This study is motivated by current difficulties of evaluation of optical properties…

统计力学 · 物理学 2009-11-10 R. D. Rohrmann

Using non-relativistic many body quantum field theory, a master equation is derived for the reduced density matrix of a dilute gas of massive particles undergoing scattering interactions with an environment of light particles. The dynamical…

量子物理 · 物理学 2009-11-10 P. J. Dodd , J. J. Halliwell

Inspired by the stochastic particle method, this paper establishes an easily implementable explicit numerical method for McKean-Vlasov stochastic differential equations (MV-SDEs) with superlinear growth coefficients. The paper establishes…

概率论 · 数学 2025-12-25 Yuanping Cui , Xiaoyue Li , Yi Liu , Fengyu Wang

We quantify the accuracy with which the cosmological parameters characterizing the energy density of matter (\Omega_m), the amplitude of the power spectrum of matter fluctuations (\sigma_8), the energy density of neutrinos (\Omega_{\nu})…

宇宙学与河外天体物理 · 物理学 2015-06-05 Surhud More , Frank van den Bosch , Marcello Cacciato , Anupreeta More , Houjun Mo , Xiaohu Yang

This paper presents the design and analysis of a Hybrid High-Order (HHO) approximation for a distributed optimal control problem governed by the Poisson equation. We propose three distinct schemes to address unconstrained control problems…

数值分析 · 数学 2025-01-14 Gouranga Mallik , Ramesh Chandra Sau

We investigate how quantum coherence can be distributed among the several off-diagonal elements of an arbitrary density matrix. An easily computable quantity that captures this variability notion is proposed and it is argued that it…

量子物理 · 物理学 2026-04-24 Fernando Parisio

Hamiltonians whose symbols are not simply real valued, but matrix or, more generally, endomorphism valued functions appear in many places in physics, examples being the Dirac equation, multicomponent wave equations like electrodynamics in…

高能物理 - 理论 · 物理学 2007-05-23 C. Emmrich , H. Römer

A well known argument in cosmology gives that the power spectrum (or structure function) $P(k)$ of mass density fluctuations produced from a uniform initial state by physics which is causal (i.e. moves matter and momentum only up to a…

天体物理学 · 物理学 2009-11-07 A. Gabrielli , M. Joyce , B. Marcos , P. Viot

Dicke state, a coherent state of multiple particles, is fundamentally responsible for various intriguing collective behaviors of many-body systems. Experimental access to Dicke states with a scalable and deterministic number of particles is…

原子物理 · 物理学 2019-05-28 Shaogang Yu , Michael Titze , Yifu Zhu , Xiaojun Liu , Hebin Li

A time-dependent current-density-functional theory for many-particle systems in interaction with arbitrary external baths is developed. We prove that, given the initial quantum state $|\Psi_0>$ and the particle-bath interaction operator,…

介观与纳米尺度物理 · 物理学 2007-06-13 Massimiliano Di Ventra , Roberto D'Agosta

We derive a multiconfigurational time-dependent Hartree theory for systems with particle conversion. In such systems particles of one kind can convert to another kind and the total number of particles varies in time. The theory thus extends…

量子物理 · 物理学 2009-02-07 Ofir E. Alon , Alexej I. Streltsov , Lorenz S. Cederbaum

In this article we study a relatively novel way of constructing chaotic sequences of probability measures supported on Kac's sphere, which are obtained as the law of a vector of $N$ i.i.d. variables after it is rescaled to have unit average…

概率论 · 数学 2022-04-13 Roberto Cortez , Hagop Tossounian
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