有效轴子背景中电响应与磁响应的混合
Hybridization of electric and magnetic responses in the effective axion background
AI总结:
本文研究了有效轴子背景中振荡电偶极子或磁偶极子产生的电磁场,解析解表明外部场为电与磁偶极子场的叠加,该维滕效应推广可在磁电材料等中实现,用于探测P和T对称性破缺。
摘要:
我们研究了放置在具有非零时不变有效轴子场的球形体积内的振荡点电偶极子或磁偶极子所产生的电磁场。我们的解析解表明,体积外部的场是电偶极子场和磁偶极子场的叠加。这种维滕效应的多极时变推广可以在磁电材料、拓扑绝缘体或超材料中实现,为在不同电磁结构中探测P和T对称性破缺现象提供了灵活的手段。
英文摘要:
We investigate the electromagnetic fields produced by the oscillating point electric or magnetic dipole placed in a spherical volume with nonzero time-independent effective axion field. Our analytical solution shows that the fields outside the volume are a superposition of electric and magnetic dipole fields. Such multipole time-dependent generalization of the Witten effect can be realized in magneto-electrics, topological insulators or metamaterials providing a flexible probe of P- and T-symmetry breaking phenomena in different electromagnetic structures.
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