Anomalous Casimir effect in axion electrodynamics
Anomalous Casimir effect in axion electrodynamics
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DOI：
10.1103/physrevd.100.045013
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发表时间：
2019-06
影响因子：
5
通讯作者：
K. Fukushima;S. Imaki;Z. Qiu
中科院分区：
文献类型：
--
作者：
K. Fukushima;S. Imaki;Z. Qiu
研究了轴子电动力学中的Casimir效应。有限的$\theta$-项影响光子的能量色散关系，如果$\theta$是时间和/或空间相关的。我们专注于一个特殊的情况下，线性非齐次$\theta$沿着的$z$-轴。然后，我们证明了两个平行板之间的Casimir力垂直于$z$-轴可以是吸引力或排斥力，依赖于梯度的$\theta$。我们称这种排斥成分的Casimir力引起的不均匀$\theta$的异常Casimir效应。
We study the Casimir effect in axion electrodynamics. A finite $\theta$-term affects the energy dispersion relation of photon if $\theta$ is time and/or space dependent. We focus on a special case with linearly inhomogeneous $\theta$ along the $z$-axis. Then we demonstrate that the Casimir force between two parallel plates perpendicular to the $z$-axis can be either attractive or repulsive, dependent on the gradient of $\theta$. We call this repulsive component in the Casimir force induced by inhomogeneous $\theta$ the anomalous Casimir effect.