中国物理B ›› 2018, Vol. 27 ›› Issue (8): 80302-080302.doi: 10.1088/1674-1056/27/8/080302
• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇 下一篇
Dynamical effects of switching a super-critical well potential on pair creation from a vacuum
Qiang Wang(王强), Qin-Zhi Xia(夏勤智), Jie Liu(刘杰), Li-Bin Fu(傅立斌)
- 1 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
2 Graduate School, China Academy of Engineering Physics, Beijing 100088, China;
3 CAPT, HEDPS, and IFSA Collaborative Innovation Center of the Ministry of Education, Peking University, Beijing 100871, China
Dynamical effects of switching a super-critical well potential on pair creation from a vacuum
Qiang Wang(王强)1, Qin-Zhi Xia(夏勤智)1, Jie Liu(刘杰)3, Li-Bin Fu(傅立斌)2,3
- 1 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
2 Graduate School, China Academy of Engineering Physics, Beijing 100088, China;
3 CAPT, HEDPS, and IFSA Collaborative Innovation Center of the Ministry of Education, Peking University, Beijing 100871, China
摘要：
The dynamical effects on electron-positron pair creation from a vacuum caused by the switching processes of a super-critical well potential are investigated in detail. The results show that only when the switching on and switching off time both increase will the final pair yield converge to the integer of embedded bound states nearly exponentially. But a single adiabatic switching on or switching off cannot lead to an integer pair yield. If the potential is turned on abruptly, associated with the discrete and embedded bound states, there is multi-frequency oscillation around the pair number's saturation. The slowly switching on can suppress the amplitude of this oscillation and reduce the final pair yield. The switching off can also reduce the final pair number in the same order of magnitude. The evolution of a single-pair number shows a robust long range correlation between particle and antiparticle. For an adiabatic switching case, the single-pair dominates the early pair creation, their upper limit value is equal to the integer, and these single-pairs will totally disentangle during the switching off.
中图分类号: (Quantum mechanics)
- 03.65.-w