论文标题
在有限温度和密度下MDCDW相的相变和弹性
Phase transitions and resilience of the MDCDW phase at finite temperature and density
论文作者
论文摘要
我们研究磁双手性密度波（MDCDW）的相变。在存在强磁场的情况下，这种空间不均匀的相位在冷的，致密的QCD中出现。从自由能的广义GL扩展开始，我们得出了几种分析公式，这些公式可以使扩展系数的快速数值计算到任意顺序，从而在确定物理动力学参数以及不同磁场的温度VS.化学电位平面中的过渡曲线中可以高水平的精度。在磁场和与中子恒星（NS）条件兼容的温度下，MDCDW在所有密度下仍然在对称基态上受到青睐。该阶段的“弹性”在（1）的一个小但非零的残留质量和中间密度的显着调节区域中表现出来，部分源自最低兰道水平的非平凡拓扑，以及（2）高密度下浓度增加的冷凝物参数的区域。我们的分析表明，在密度和温度下，MDCDW冷凝物在远高于先前所考虑的高度方面仍然有利，这为该阶段成为可行的候选者的可能性即使是NS合并产生的年轻中子星的物质结构。
We study the phase transitions of the magnetic dual chiral density wave (MDCDW). This spatially inhomogeneous phase emerges in cold, dense QCD in the presence of a strong magnetic field. Starting from the generalized GL expansion of the free energy, we derive several analytical formulas that enable fast numerical computation of the expansion coefficients to arbitrary order, allowing high levels of precision in the determination of the physical dynamical parameters, as well as in the transition curves in the temperature vs. chemical potential plane at different magnetic fields. At magnetic fields and temperatures compatible with neutron star (NS) conditions, the MDCDW remains favored over the symmetric ground state at all densities. The phase's "resilience" manifests in (1) a region of small but nonzero remnant mass and significant modulation at intermediate densities, originating in part from the nontrivial topology of the lowest Landau level, and (2) a region of increasing condensate parameters at high densities. Our analysis suggests the MDCDW condensate remains energetically favored at densities and temperatures much higher than previously considered, opening the possibility for this phase to be a viable candidate for the matter structure of even young neutron stars produced by NS mergers.
