线性响应中极克尔效应的时阻对称破缺的必要性
Necessity of Time-Reversal Symmetry Breaking for the Polar Kerr Effect in Linear Response
摘要：
我们表明，在后向散射几何测量，极性克尔效应是不存在的，如果非局部电磁响应函数尊重Onsager对称性，热力学状态的特征，保持时间反演对称性。一个关键的元素是反射率张量的延迟格林函数的表达式。
英文摘要：
We show that, measured in a backscattering geometry, the polar Kerr effect is absent if the nonlocal electromagnetic response function respects Onsager symmetry, characteristic of thermodynamic states that preserve time-reversal symmetry. A key element is an expression for the reflectivity tensor in terms of the retarded Green's function.
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