Degeneracies of discrete and continuum states with the Dirac sea in the pair-creation process

被引:9
作者
Lv, Q. Z. [1 ]
Liu, Y. [2 ]
Li, Y. J. [1 ]
Grobe, R. [3 ,4 ]
Su, Q. [2 ,3 ,4 ]
机构
[1] China Univ Min & Technol, State Key Lab GeoMech & Deep Underground Engn, Beijing 100083, Peoples R China
[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China
[3] Illinois State Univ, Intense Laser Phys Theory Unit, Normal, IL 61790 USA
[4] Illinois State Univ, Dept Phys, Normal, IL 61790 USA
来源
PHYSICAL REVIEW A | 2014年 / 90卷 / 01期
关键词
KLEIN PARADOX; FIELD; POSITRON; EQUATION; RESOLUTION; ENERGIES; ELECTRON; DYNAMICS; SYSTEMS;
D O I
10.1103/PhysRevA.90.013405
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
By solving the quantum field theoretical Dirac and Klein-Gordon equations numerically we analyze the different roles of discrete and continuum states for the pair-creation process from the vacuum. If this process is solely induced by discrete states that have become degenerate with the negative energy continuum, the complex scaling method can predict the time scales associated with the bosonic as well as fermionic growth of the particle yield. We show that for bosons the long-time exponential growth behavior is not affected by additional continuum-continuum degeneracies, while for fermions they characterize the asymptotic (linear) growth. We illustrate the impact of these degeneracies on the temporally resolved energy and spatial distributions of the created particles.
引用
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页数:10
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