Vacuum refractive indices and helicity flip in strong-field QED

被引：122
作者：
Dinu, Victor [1 ]
Heinzl, Tom [2 ]
Ilderton, Anton [3 ]
Marklund, Mattias [3 ]
Torgrimsson, Greger [3 ]
机构：
[1] Univ Bucharest, Dept Phys, Magurele 077125, Romania
[2] Univ Plymouth, Sch Comp & Math, Plymouth PL4 8AA, Devon, England
[3] Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden
来源：
PHYSICAL REVIEW D | 2014年 / 89卷 / 12期
基金：
瑞典研究理事会;
关键词：
PLANE ELECTROMAGNETIC WAVE; QUANTUM ELECTRODYNAMICS; PROPAGATION; POLARIZATION; ELECTRON; SHIFT;
D O I：
10.1103/PhysRevD.89.125003
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Vacuum birefringence is governed by the amplitude for a photon to flip helicity or polarization state in an external field. Here, we calculate the flip and nonflip amplitudes in arbitrary plane wave backgrounds, along with the induced spacetime-dependent refractive indices of the vacuum. We compare the behavior of the amplitudes in the low energy and high energy regimes, and analyze the impact of pulse shape and energy. We also provide the first lightfront-QED derivation of the coefficients in the Heisenberg-Euler effective action.
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页数：18
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