摘要
Based on the numerical solution of the time-dependent Dirac equation,we propose a method to observe in real time the ac Stark shift of a vacuum driven by an ultra-intense laser field.By overlapping the ultra-intense pump pulse with another zeptosecond probe pulse whose photon energy is smaller than 2mc^(2),electron–positron pair creation can be controlled by tuning the time delay between the pump and probe pulses.Since the pair creation rate depends sensitively on the instantaneous vacuum potential,one can reconstruct the ac Stark shift of the vacuum potential according to the time-delay-dependent pair creation rate.
作者
苏丹丹
江淼
Dandan Su;Miao Jiang(Key Laboratory for Laser Plasmas(Ministry of Education)and School of Physics and Astronomy,Collaborative Innovation Center for IFSA(CICIFSA),Shanghai Jiao Tong University,Shanghai 200240,China;School of Science,China University of Mining and Technology,Beijing 100083,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Beijing 100083,China)
基金
supported by the National Natural Science Foundation of China(Grant Nos.12304341 and 11974419)
the National Key R&D Program of China(Grant Nos.2021YFA1601700 and 2018YFA0404802)
the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDA25051000).
