Creation and annihilation phenomena of electron and positron pairs in an oscillating field* *Project supported by the National Natural Science Foundation of China (Grant Nos. 11974419 and 11605286), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDA25051000), and the National Key R&D Program of China (Grant No. 2018YFA0404802).

Abstract

The combination of an oscillating and a static field is used to study the creation and annihilation phenomena during the pair creation process. The time evolution, spatial density and momentum distribution of the created particles for a fermionic system are presented, which demonstrate that with the increasing static field intensity, the number of the created particles experiences a distinguishable decrease in every period of the oscillating field, which is caused by the annihilation phenomena between the created electrons and positrons.