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The influence of dispersion on the differential scattering cross section in the vicinity of the first diffraction minimum is revisited for collision energies between 200 and 450 MeV. Transient nuclear excitations in the giant resonance…

核理论 · 物理学 2026-03-12 D. H. Jakubassa-Amundsen

We present a calculation of the spectral properties of a single charge doped at a Cu($3d$) site of the Cu-F plane in KCuF$_{3}$. The problem is treated by generating the equations of motion for the Green's function by means of subsequent…

强关联电子 · 物理学 2016-12-26 Krzysztof Bieniasz , Mona Berciu , Andrzej M. Oleś

Within the framework of macroscopic quantum electrodynamics in linear, causal media, we study the van der Waals potentials of ground-state atoms in planar magnetodielectric host media. Our investigation extends earlier ones in two aspects:…

量子物理 · 物理学 2009-02-23 Agnes Sambale , Dirk-Gunnar Welsch , Ho Trung Dung , Stefan Yoshi Buhmann

One of the most striking many-body phenomena in nature is the sudden change of macroscopic properties as the temperature or energy reaches a critical value. Such equilibrium transitions have been predicted and observed in two and three…

Quantum thermal transport in two-quantum-dot system with Dzyaloshinskii-Moriya interaction (DM interaction) has been studied. The sign of thermal rectification can be controlled through changing the energy splitting or the DM interaction…

量子物理 · 物理学 2012-11-14 T Chen , X. B. Wang

A system of diffusion-reaction equations coupled with a dissolution-precipitation model is discussed. We start by introducing a microscale model together with its homogenized version. In the present paper, we first derive the corrector…

偏微分方程分析 · 数学 2023-09-27 Nibedita Ghosh , Hari Shankar Mahato

We consider the thermal behavior of a large number of matrix degrees of freedom in the planar limit. We work in $0+1$ dimensions, with $D$ matrices, and use $1/D$ as an expansion parameter. This can be thought of as a non-commutative…

高能物理 - 理论 · 物理学 2024-12-03 Takanori Anegawa , Norihiro Iizuka , Daniel Kabat

We investigate equilibrium properties, including structure of the order parameter, superflow patterns, and thermodynamics of low-temperature surface phases of layered d_{x^2-y^2}-wave superconductors in magnetic field. At zero external…

超导电性 · 物理学 2018-06-18 P. Holmvall , A. B. Vorontsov , M. Fogelstrom , T. Lofwander

We show that an increasingly strong thermal rectification effect occurs in the thermodynamic limit in a one-dimensional, graded rotor lattice with nearest-neighboring interactions only. The underlying mechanism is related to the transition…

统计力学 · 物理学 2020-02-11 Shunjiang You , Daxing Xiong , Jiao Wang

In this first paper, we demonstrate a theorem that establishes a first step toward proving a necessary topological condition for the occurrence of first or second order phase transitions: we prove that the topology of certain submanifolds…

数学物理 · 物理学 2008-11-26 Roberto Franzosi , Marco Pettini , Lionel Spinelli

Symmetry energy, temperature and density at the time of the intermediate mass fragment formation are determined in a self-consistent manner, using the experimentally reconstructed primary hot isotope yields and anti-symmetrized molecular…

The conjecture, that the finite volume corrections to the thermodynamic functions can be correctly reproduced by using the thermodynamic limit with low particle momenta cutoff is examined in a very transparent example of an ideal boson gas…

核理论 · 物理学 2016-11-14 Krzysztof Redlich , Kacper Zalewski

We compute corrections to the hard thermal (or dense) loop photon polarization tensor associated to a small mass $m$ of the fermions of an electromagnetic plasma at high temperature $T$ (or chemical potential $\mu$). To this aim we use the…

高能物理 - 唯象学 · 物理学 2021-10-13 Marc Comadran , Cristina Manuel

We find third-power nonlinear corrections to the Coulomb and other static electric fields, as well as to the electric and magnetic dipole fields, as we work within QED with no background field. The nonlinear response function we base our…

高能物理 - 理论 · 物理学 2013-10-30 Caio V. Costa , Dmitry M. Gitman , Anatoly E. Shabad

We study non-perturbative real time correlation functions at finite temperature. In order to see whether the classical term gives a good approximation in the high temperature limit T >> \hbar\omega, we consider the first \hbar^2 quantum…

高能物理 - 唯象学 · 物理学 2016-09-06 D. Bodeker , M. Laine , O. Philipsen

This paper presents a saddlepoint approximation of the random-coding union bound of Polyanskiy et al. for i.i.d. random coding over discrete memoryless channels. The approximation is single-letter, and can thus be computed efficiently.…

信息论 · 计算机科学 2014-04-28 Jonathan Scarlett , Alfonso Martinez , Albert Guillén i Fàbregas

This letter is an investigation of the pion form factor utilizing recently developed effective field theory techniques. The primary results reported are: Both the transition and electromagnetic form factors are corrected at order…

高能物理 - 唯象学 · 物理学 2009-11-10 Ira Z. Rothstein

Decoding in large language models is often described as scoring tokens and normalizing with softmax. We give a minimal, self-contained account of this step as a constrained variational principle on the probability simplex. The discrete,…

机器学习 · 计算机科学 2025-09-01 Christopher R. Lee-Jenkins

We investigate by means of a variational approach the effective potential of a 5D U(1) scalar model at finite temperature and compactified on S^1 and S^1/Z_2 as well as the corresponding 4D model obtained through a trivial dimensional…

高能物理 - 唯象学 · 物理学 2015-09-30 Daniele Dominici , Itzhak Roditi

The inclusion of higher derivative terms in the gravitational action brings about corrections to the original forms of black hole solutions and thermodynamics. A simple and valuable approach has emerged over two decades ago, which states…

广义相对论与量子宇宙学 · 物理学 2024-11-19 Yong Xiao , Yue-Ying Liu