Energy and Heat Fluctuations in a Temperature Quench

作     者：M.Zannetti F.Corberi G.Gonnella A.Piscitelli 

作者机构：Dipartimento di Fisica "E.Caianiello"and CNISMUnità di SalernoUniversità di Salernovia Giovanni Paolo II 13284084 Fisciano (SA)Italy Kavli Institute for Theoretical Physics Chinathe Chinese Academy of Sciences Dipartimento di FisicaUniversità di Bari and INFNSezione di Barivia Amendola 17370126 BariItaly Division of Physical SciencesSchool of Physical and Mathematical SciencesNanyang Technological University21 Nanyang Link637371Singapore 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2014年第61卷第10期

页      面：555-570页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0704[理学-天文学] 0702[理学-物理学] 

主　　题：fluctuations condensation temperature quench relaxation equipartition breaking 

摘      要：Fluctuations of energy and heat are investigated during the relaxation following the instantaneous temperature quench of an extended system. Results are obtained analytically for the Gaussian model and for the large N model quenched below the critical temperature TC. The main finding is that fluctuations exceeding a critical threshold do condense. Though driven by a mechanism similar to that of Bose–Einstein condensation, this phenomenon is an out-of-equilibrium feature produced by the breaking of energy equipartition occurring in the transient regime. The dynamical nature of the transition is illustrated by phase diagrams extending in the time direction.