Absence of Landau-Peierls instability in the magnetic dual chiral density wave phase of dense QCD
Absence of Landau-Peierls instability in the magnetic dual chiral density wave phase of dense QCD
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DOI：
10.1103/physrevd.102.014010
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发表时间：
2019-02
影响因子：
5
通讯作者：
E. J. Ferrer;V. de la Incera
中科院分区：
文献类型：
--
作者：
E. J. Ferrer;V. de la Incera
研究了冷致密QCD的磁性双手征密度波(MDCDW)相对序参数集体低能涨落的稳定性。由于外加磁场对转动对称性和同位旋对称性的明显破坏，在系统中出现了附加结构自由能，这在分析中起着至关重要的作用。这种新的结构加强了横向热涨落的频谱，从而避免了在任意低温下影响单调制位相的Landau-Peierls不稳定性。MDCDW相中不存在Landau-Peierls不稳定性，这使得这种致密夸克物质的不均匀相对中子星的物理特别感兴趣。
We investigate the stability of the magnetic dual chiral density wave (MDCDW) phase of cold and dense QCD against collective low-energy fluctuations of the order parameter. The appearance of additional structures in the system free energy due to the explicit breaking of the rotational and isospin symmetries by the external magnetic field play a crucial role in the analysis. The new structures stiffen the spectrum of the thermal fluctuations in the transverse direction, thereby avoiding the Landau-Peierls instability that affects single-modulated phases at arbitrarily low temperatures. The lack of Landau-Peierls instabilities in the MDCDW phase makes this inhomogeneous phase of dense quark matter of particular interest for the physics of neutron stars.