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arXiv 0709.1637hep-th
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轴子电动力学光子传播子

Photon propagator for axion electrodynamics

Yakov Itin

摘要:

在场论中,轴子修正电动力学通常被用来描述洛伦兹不变性可能被破坏的情况。在用电磁波进行实验时,我们有望观察到洛伦兹破坏的低能表现。这说明了研究一个小的轴子附加如何改变波的传播的重要性。虽然恒定的轴子对色散关系没有任何贡献,但即使是缓慢变化的轴子场也会破坏光锥结构。本文在预度规方法的框架下研究了轴子修正电动力学中的波传播。在修正色散关系的基础上,我们导出了费曼和朗道规范中光子传播子的轴子推广。我们的考虑是免费的,从通常的限制,通常的限制,以常数梯度轴子场。值得注意的是,轴子修正传播子是厄米的。因此,甚至在这里考虑的唯象模型中也不存在耗散效应。

英文摘要:

The axion modified electrodynamics is usually used as a model for description of possible violation of Lorentz invariance in field theory. The low-energy manifestation of Lorentz violation can hopefully be observed in experiments with the electromagnetic waves. It justifies the importance of study how a small axion addition can modify the wave propagation. Although a constant axion does not contribute to the dispersion relation at all, even a slowly varying axion field destroys the light cone structure. In this paper, we study the wave propagation in the axion modified electrodynamics in the framework of premetric approach. In an addition to the modified dispersion relation, we derive the axion generalization of the photon propagator in Feynman and Landau gauge. Our consideration is free from the usual restriction of a usual restriction to the constant gradient axion field. It is remarkable that the axion modified propagator is hermitian. Consequently the dissipation effects absent even in the phenomenological model considered here.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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