Drift effect on vacuum birefringence in a strong electric and magnetic field  

作　　者：黄永盛 王乃彦 汤秀章 

机构地区：[1]High Power KrF Excimer Laser Laboratory,China Institute of Atomic Energy

出　　处：《Chinese Physics B》2015年第3期166-168,共3页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2011CB808104);the National Natural Science Foundation of China(Grant No.11105233)

摘　　要：As an important QED effect to detect the vacuum polarization, birefringence in the presence of a strong electric and magnetic field, E0⊥ B0, E0≤ c B0, is considered. The directional dependence of birefringence is obtained. In two special cases： E0= 0 and E0= c B0, our results are consistent with the previous ones. The refractive index of the probe wave propagating in the -E0× B0 direction decreases with E0/c B0, while that in the-E0× B0 direction increases with E0/c B0.The physics of the direction dependence of birefringence maybe the E0× B0 drift velocity of the virtual electrons and positrons.As an important QED effect to detect the vacuum polarization, birefringence in the presence of a strong electric and magnetic field, E0⊥ B0, E0≤ c B0, is considered. The directional dependence of birefringence is obtained. In two special cases： E0= 0 and E0= c B0, our results are consistent with the previous ones. The refractive index of the probe wave propagating in the -E0× B0 direction decreases with E0/c B0, while that in the-E0× B0 direction increases with E0/c B0.The physics of the direction dependence of birefringence maybe the E0× B0 drift velocity of the virtual electrons and positrons.

关 键 词：vacuum birefringence critical Schwinger field refractive index E×B drift 

分 类 号：O441.4[理学—电磁学]