Chirality, causality, and fluctuation-dissipation theorems in nonequilibrium steady states.
Chirality, causality, and fluctuation-dissipation theorems in nonequilibrium steady states.
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非平衡稳态中的手性、因果关系和波动耗散定理。
DOI：
10.1103/physrevlett.110.030602
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发表时间：
2012
影响因子：
8.6
通讯作者：
D. Feldman
中科院分区：
文献类型：
--
作者：
Chenjie Wang;D. Feldman
一些量子霍尔液体和许多其他系统的边缘表现出手性传输：激发只能在一个方向上传播，例如，顺时针。我们推导出了这类手征系统在非平衡定态下的涨落耗散关系。这些定理将非线性响应与远离热平衡的涨落联系起来，并且只在手征输运的情况下成立。它们可用于检测体系的手性或非手性特征。
Edges of some quantum Hall liquids and a number of other systems exhibit chiral transport: excitations can propagate in one direction only, e.g., clockwise. We derive a family of fluctuation-dissipation relations in nonequilibrium steady states of such chiral systems. The theorems connect nonlinear response with fluctuations far from thermal equilibrium and hold only in case of chiral transport. They can be used to test the chiral or nonchiral character of the system.