Probing vacuum birefringence under a high-intensity laser field with gamma-ray polarimetry at the GeV scale
Probing vacuum birefringence under a high-intensity laser field with gamma-ray polarimetry at the GeV scale
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DOI：
10.1103/physrevd.96.053002
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
Y. Nakamiya;K. Homma
中科院分区：
文献类型：
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作者：
Y. Nakamiya;K. Homma
探测由高场形变的真空结构是人们普遍感兴趣的问题。在量子电动力学(QED)的背景下，线偏振高强度激光场暴露的真空有望呈现双折射。我们考虑了10PW激光系统抽运真空和1GeV光子探测双折射效应的组合。真空双折射可以通过探测γ射线的偏振反转来测量，这也可以解释为探测光子的相位延迟。从理论上给出了如何利用Bethe-Heitler过程的成对拓扑法提取GeV探测器光子的位相延迟，然后通过位相延迟来评估真空双折射的可测性，给出了一个具有实际激光参数和可实现的脉冲统计的具体的偏振仪设计。
Probing vacuum structures deformed by high intense fields is of great interest in general. In the context of quantum electrodynamics (QED), the vacuum exposed by a linearly polarized high-intensity laser field is expected to show birefringence. We consider the combination of a 10 PW laser system to pump the vacuum and 1 GeV photons to probe the birefringent effect. The vacuum birefringence can be measured via the polarization flip of the probe $\gamma$-rays which can also be interpreted as phase retardation of probe photons. We provide theoretically how to extract phase retardation of GeV probe photons via pair-wise topology of the Bethe-Heitler process in a polarimeter and then evaluate the measurability of the vacuum birefringence via phase retardation given a concrete polarimeter design with a realistic set of laser parameters and achievable pulse statistics.