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arXiv 1707.00701hep-phastro-ph.COhep-ex
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介电界面引起的轴子-光子转换:量子场计算

Axion-photon conversion caused by dielectric interfaces: quantum field calculation

Ara N. Ioannisian, Narine Kazarian, Alexander J. Millar, Georg G. Raffelt

摘要:

近均匀磁场中介质界面上的轴子-光子转换是介质晕镜方法寻找轴子暗物质的基础。类似于跃迁辐射,该过程是可能的,因为光子波函数被介电层修改(“加里比波函数“)并且不再是动量的本征态。一个传统的一阶微扰计算的量子化轴子状态和这些扭曲的光子状态之间的跃迁概率提供了微波产生率。这一结果与以往基于求解经典麦克斯韦方程组的轴子-电磁场组合系统的结果一致。我们认为,在一般情况下,平均光子产生率是由我们的结果,独立的详细的量子态的轴子场。此外,我们的研究结果提供了一个新的视角在介质haloscope的轴子-光子转换,因为速率是基于未扰动轴子和光子波函数之间的重叠积分,在类似的微波腔haloscope的通常治疗。

英文摘要:

Axion-photon conversion at dielectric interfaces, immersed in a near-homogeneous magnetic field, is the basis for the dielectric haloscope method to search for axion dark matter. In analogy to transition radiation, this process is possible because the photon wave function is modified by the dielectric layers ("Garibian wave function") and is no longer an eigenstate of momentum. A conventional first-order perturbative calculation of the transition probability between a quantized axion state and these distorted photon states provides the microwave production rate. It agrees with previous results based on solving the classical Maxwell equations for the combined system of axions and electromagnetic fields. We argue that in general the average photon production rate is given by our result, independently of the detailed quantum state of the axion field. Moreover, our result provides a new perspective on axion-photon conversion in dielectric haloscopes because the rate is based on an overlap integral between unperturbed axion and photon wave functions, in analogy to the usual treatment of microwave-cavity haloscopes.

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