Generalized invariants and quantum evolution of open fermionic systems

被引：15
|
作者：
Kim, SP [1 ]
Santana, AE
Khanna, FC
机构：
[1] Kunsan Natl Univ, Dept Phys, Kunsan 573701, South Korea
[2] Univ Fed Bahia, Inst Fis, BR-40210340 Salvador, BA, Brazil
[3] Univ Alberta, Dept Phys, Inst Theoret Phys, Edmonton, AB T6J 2J1, Canada
[4] TRIUMF, Vancouver, BC V6T 2A3, Canada
来源：
PHYSICS LETTERS A | 2000年 / 272卷 / 1-2期
基金：
加拿大自然科学与工程研究理事会; 新加坡国家研究基金会;
关键词：
D O I：
10.1016/S0375-9601(00)00406-0
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Open systems acquire time-dependent coupling constants through interaction with an external field or environment. We generalize the Lewis-Riesenfeld invariant theorem to open system of quantum fields after second quantizarion. The generalized invariants and thereby the quantum evolution are found explicity for time-dependent quadratic fermionic systems. The pair production of fermions is computed and other physical implications an discussed. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：46 / 52
页数：7
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