Speed of Sound in Asymmetric Quark Matter

作     者：XIE Chonglong HE Weibo LI Zhipeng SHAO Guoyun 解重龙;贺伟博;李志鹏;邵国运

作者机构：MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed MatterSchool of PhysicsXi’an Jiaotong UniversityXi’an 710049China School of PhysicsPeking UniversityBeijing 100871China 

出 版 物：《原子核物理评论》 (Nuclear Physics Review)

年 卷 期：2024年第41卷第1期

页      面：587-593页

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：国家自然科学基金资助项目(11875213) 陕西省自然科学基础研究计划(2024JC-YBMS-018) 

主　　题：quark-gluon plasma equation of state speed of sound 

摘      要：The speed of sound in quark matter is an important physical quantity for studying the properties and the spacetime evolution of quark-gluon plasma(QGP).The behavior of the speed of sound with respect to temperature and density can reveal to some extent the equation of state and the phase structure of *** upon the previous studies on the speed of sound in symmetric quark matter,the formulae for calculating the speed of sound in asymmetric quark matter in the temperature-density space are further *** PNJL model is then used to calculate the dependence of the speed of sound on isospin ***,the relationship between the magnitude of the speed of sound and the QCD phase structure is discussed,and the regions where the acoustic equation fails are indicated under different physical *** is found that the boundary of vanishing sound speed in asymmetric quark matter is smaller than that in symmetric quark matter,meaning that the range where the acoustic wave equation fails in asymmetric quark matter is smaller than that in symmetric quark *** results also indicate that in most of the stable phase,the speed of sound in asymmetric quark matter is slightly larger than that in symmetric quark matter.