Spontaneous current generation in the 2SC phase
Spontaneous current generation in the 2SC phase
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DOI：
10.1103/physrevd.73.045007
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发表时间：
2005-04
影响因子：
5
通讯作者：
Mei Huang
中科院分区：
文献类型：
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作者：
Mei Huang
结果表明，除了色磁不稳定性外，无带隙2SC相对外部色中性重子流的扰动也表现出顺磁响应。由失配驱动的自发产生的重子流等价于单平面波Larkin-Ovchinnikov-Fudde-Ferrell（LOFF）态。我们描述的2SC阶段的非线性实现框架，并表明，每个不稳定性表明相应的伪Nambu-Goldstone电流的自发产生。我们表明，这个Nambu-Goldstone电流产生状态涵盖胶子相位以及单平面波LOFF状态。进一步指出，当需要电荷中性条件时，存在一个窄的不稳定LOFF（Us-LOFF）窗口，在此窗口中，不仅非对角胶子，而且对角8胶子都不能避免磁不稳定性.我们讨论了在色超导相中的非对角胶子凝聚不能消除这种Us-LOFF窗口中的对角磁不稳定性，并且这种不稳定性也会出现在某些约束Abel非对称超流/超导系统中.
It is found that, except chromomagnetic instability, the gapless 2SC phase also exhibits a paramagnetic response to the perturbation of an external color neutral baryon current. The spontaneously generated baryon current driven by the mismatch is equivalent to the one-plane wave Larkin-Ovchinnikov-Fudde-Ferrell (LOFF) state. We describe the 2SC phase in the nonlinear realization framework, and show that each instability indicates the spontaneous generation of the corresponding pseudo-Nambu-Goldstone current. We show this Nambu-Goldstone currents generation state covers the gluon phase as well as the one-plane wave LOFF state. We further point out that, when the charge neutrality condition is required, there exists a narrow unstable LOFF (Us-LOFF) window, where not only off-diagonal gluons but the diagonal 8th gluon cannot avoid the magnetic instability. We discuss that the diagonal magnetic instability in this Us-LOFF window cannot be cured by an off-diagonal gluon condensate in the color superconducting phase, and it will also show up in some constrained Abelian asymmetric superfluid/superconducting systems.