电流驱动三临界点的电流诱导逆对称破缺和非对称临界现象
Current-induced inverse symmetry breaking and asymmetric critical phenomena at current-driven tricritical point
摘要：
本文利用全息术研究了电流驱动非平衡稳态中与自发手征对称性破缺有关的临界现象。我们发现，在三临界点的临界指数$(γ, ν)$之间的手征对称性恢复阶段和破碎阶段是不对称的。它们在破缺相中的值不同于平均场论中的值，而其它临界指数都是平均场的值。相对于温度和电流密度的相图示出了重入结构：在电流密度的存在下，在低温下再次恢复破缺的手征对称性。
英文摘要：
We study critical phenomena associated with a spontaneous chiral symmetry breaking in current-driven non-equilibrium steady states by using holography. We find that the critical exponents $(γ, ν)$ at the tricritical point are asymmetric between the chiral symmetry restored phase and the broken phase. Their values in the broken phase are different from those of the mean-field theory, whereas other critical exponents are the mean-field values. The phase diagram with respect to temperature and current density shows a re-entrant structure: the broken chiral symmetry is restored again at low temperatures in the presence of current density.
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