标题： 具有夸克反常磁矩的磁化夸克物质中的声速和等温压缩性 显示英文标题

标题： Speed of sound and isothermal compressibility in a magnetized quark matter with anomalous magnetic moment of quarks

摘要： 我们研究了有限温度和夸克化学势下，在背景磁场影响下的具有反常磁矩（AMM）的夸克物质特性，采用了带有多项式环扩展的Nambo-Jona-Lasinio（PNJL）模型。 在存在磁场的情况下，声速和等温压缩率相对于背景磁场方向变为各向异性，分裂为平行和垂直于磁场的方向。 尽管平行和垂直分量的平方声速的定性性质相似，但在较低温度下它们的幅度有所不同。 等温压缩率的平行和垂直分量随温度升高而减小，表明系统趋向于更不可压缩的强相互作用物质。 引入夸克的AMM后，等温压缩率的垂直分量大于平行分量。 此外，我们还研究了归一化为零磁场时值的夸克数磁化率，这可能指示系统中存在磁场。 显示英文摘要

摘要： We study the characteristics of quark matter under the influence of a background magnetic field with anomalous magnetic moment (AMM) of quarks at finite temperature and quark chemical potential in the framework of Polyakov loop extended Nambu Jona-Lasinio (PNJL) model. In presence of a magnetic field, the speed of sound and isothermal compressibility become anisotropic with respect to the direction of the background magnetic field, splitting into parallel and perpendicular directions with respect to the magnetic field. Though the qualitative nature of parallel and perpendicular components of squared speed of sound appear similar, they differ in magnitude at lower values of temperature. The parallel and perpendicular components of isothermal compressibility decrease with increasing temperature, indicating a trend towards increased incompressible strongly interacting matter. On inclusion of the AMM of quarks, the perpendicular component of isothermal compressibility becomes greater than the parallel component. Additionally, we investigate the quark number susceptibility normalized by its value at zero magnetic field, which may indicate the presence of magnetic fields in the system.