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arXiv quant-ph/0604065quant-ph
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超强laser场加速电子的Unruh效应

Signatures of the Unruh effect from electrons accelerated by ultra-strong laser fields

Ralf Schützhold, Gernot Schaller, Dietrich Habs

摘要:

我们计算了强加速电子的Unruh效应所产生的辐射,并表明光子是成对产生的,它们的偏振态是最大纠缠的。除了光子统计,这种量子辐射可以进一步区分经典(拉莫尔)辐射通过不同的光谱和角分布。如果加速电子的外部电磁场不太远低于Schwinger极限,并且可能在未来的设施中观察到,那么Unruh效应的特征就会变得显著。最后讨论了由于QED真空的双折射性质在这种超高场的修正。PACS:04.62.+ v,12.20. Fv,41.60.- m,42.25Lc.

英文摘要:

We calculate the radiation resulting from the Unruh effect for strongly accelerated electrons and show that the photons are created in pairs whose polarizations are maximally entangled. Apart from the photon statistics, this quantum radiation can further be discriminated from the classical (Larmor) radiation via the different spectral and angular distributions. The signatures of the Unruh effect become significant if the external electromagnetic field accelerating the electrons is not too far below the Schwinger limit and might be observable with future facilities. Finally, the corrections due to the birefringent nature of the QED vacuum at such ultra-high fields are discussed. PACS: 04.62.+v, 12.20.Fv, 41.60.-m, 42.25.Lc.

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