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Numerical models allow the investigation of phenomena that cannot exist in a laboratory. Computational simulations are therefore essential for advancing our knowledge of astrophysics, however, the very nature of simulation requires making…

高能天体物理现象 · 物理学 2023-11-13 Catherine Feldman , Ellis Eisenberg , Dean M. Townsley , Alan C. Calder

Three-dimensional scalar electrodynamics, with a local U(1) gauge symmetry, is believed to be dual to a scalar theory with a global U(1) symmetry, near the phase transition point. The conjectured duality leads to definite predictions for…

高能物理 - 格点 · 物理学 2008-11-26 K. Kajantie , M. Laine , T. Neuhaus , A. Rajantie , K. Rummukainen

We focus on the study of the processes undergone by a perfect gas when the external pressure is suddenly modified. The analysis shows that, from the second law perspective, there is a non-evident asymmetry between the processes of…

经典物理 · 物理学 2023-11-14 Andrés Vallejo , Matías Osorio

We use a dynamical systems analysis to investigate the future behaviour of Einstein-Aether cosmological models with a scalar field coupling to the expansion of the aether and a non-interacting perfect fluid. The stability of the equilibrium…

广义相对论与量子宇宙学 · 物理学 2013-03-14 Patrik Sandin , Bassemah Alhulaimi , Alan Coley

Fresh insights and powerful numerical tools are revitalizing the theoretical exploration of the supernova mechanism. The realization that the protoneutron star is Rayleigh-Taylor unstable at various times and radii and, hence, that a…

天体物理学 · 物理学 2007-05-23 Adam Burrows anbd John Hayes

In this article we consider the inhomogeneous incompressible Euler equations describing two fluids with different constant densities under the influence of gravity as a differential inclusion. By considering the relaxation of the…

偏微分方程分析 · 数学 2021-06-15 Björn Gebhard , József J. Kolumbán , László Székelyhidi

The 2nd law of thermodynamics is used to shed light on present-day puzzles in cosmology. The universal law, given as an equation of motion, describes diverse systems when consuming free energy via various mechanisms to attain stationary…

综合物理 · 物理学 2012-06-20 Arto Annila

We consider the periodic problem for two-fluid non-isentropic Euler-Maxwell systems in plasmas. By means of suitable choices of symmetrizers and an induction argument on the order of the time-space derivatives of solutions in energy…

偏微分方程分析 · 数学 2018-08-15 Yue-Hong Feng , Xin Li , Shu Wang

Thermodynamics as limiting behaviors of statistics is generalized to arbitrary system with probability {\it a priori} where thermodynamic infinite-size limit is replaced by multiple-measurement limit. A duality symmetry between Massieu's…

统计力学 · 物理学 2022-09-28 Zhiyue Lu , Hong Qian

We show an explosion-implosion duality in the one and two dimensional Bose-Einstein condensation with or without a particular time-dependent harmonic trap. The result is independent of the strength and the attractive or the repulsive nature…

凝聚态物理 · 物理学 2014-10-13 Pijush K. Ghosh

We are concerned with spherically symmetric solutions to the Euler equations for the multi-dimensional compressible fluids, which have many applications in diverse real physical situations. The system can be reduced to one dimensional…

偏微分方程分析 · 数学 2019-08-20 Feimin Huang , Tianhong Li , Difan Yuan

The Heisenberg-Euler theory of the quantum vacuum supplements Maxwell's theory of electromagnetism with nonlinear light-light interactions. These originate in vacuum fluctuations, a key prediction of quantum theory, and can be triggered by…

计算物理 · 物理学 2023-09-28 Andreas Lindner , Baris Ölmez , Hartmut Ruhl

This article is the continued version of the analytical blowup solutions for 2-dimensional Euler-Poisson equations \cite{Y1}. With extension of the blowup solutions with radial symmetry for the isothermal Euler-Poisson equations in $R^{2}$,…

太阳与恒星天体物理 · 物理学 2011-07-28 Manwai Yuen

We consider an isothermal compressible fluid evolving on a cosmological background which may be either expanding or contracting toward the future. The Euler equations governing such a flow consist of two nonlinear hyperbolic balance laws…

偏微分方程分析 · 数学 2022-10-12 Yangyang Cao , Mohammad A. Ghazizadeh , Philippe G. LeFloch

We have derived generalized ideal gas equations for a structureful universe consisting of all forms of matters. We have assumed a universe that contains superclusters. Superclusters are then made of clusters. Each cluster can be further…

综合物理 · 物理学 2015-06-26 Shahid N. Afridi , Khalid Khan

We construct explicit examples of spontaneous energy generation and non-uniqueness for the compressible Euler system, with and without pressure, by taking limits of Hamiltonian dynamics as the number of molecules increases to infinity. The…

数学物理 · 物理学 2016-09-29 Stamatis Dostoglou , Jianfei Xue

Motivated by recent breakthrough on smooth imploding solutions of compressible Euler, we construct self-similar smooth imploding solutions of isentropic relativistic Euler equations with isothermal equation of state $p=\frac1\ell\varrho$…

偏微分方程分析 · 数学 2024-03-19 Feng Shao , Dongyi Wei , Zhifei Zhang

This article is a survey concerning the state-of-the-art mathematical theory of the Euler equations of incompressible homogenous ideal fluid. Emphasis is put on the different types of emerging instability, and how they may be related to the…

偏微分方程分析 · 数学 2015-06-26 Claude Bardos , Edriss S. Titi

The self-duality of the transverse-field Ising model is an archetype for dualities that, alongside symmetry and topology, are used as an organizing principle throughout modern physics. This duality, however, is not exact. The original and…

强关联电子 · 物理学 2026-05-14 José Dupont , Jasper van Wezel

We consider the (complete) Euler system describing the motion of a compressible perfect fluid. We propose a platform suitable for constructing the statistical solutions. The main ingredients of our approach include: 1. The concept of…

偏微分方程分析 · 数学 2026-02-03 Eduard Feireisl