Generalized Invariants and Quantum Evolution of Open Fermionic System
高能物理 - 理论
2011-07-19 v3
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 quantization. The generalized invariants and thereby the quantum evolution are found explicitly for time-dependent quadratic fermionic systems. The pair production of fermions is computed and other physical implications are discussed.
引用
@article{arxiv.hep-th/9910189,
title = {Generalized Invariants and Quantum Evolution of Open Fermionic System},
author = {S. P. Kim and A. E. Santana and F. C. Khanna},
journal= {arXiv preprint arXiv:hep-th/9910189},
year = {2011}
}
备注
LaTex, 10 pages, no figures; replaced by the version to be published in Phys. Lett. A; the validity of the Liouville-von Neumann approach is clarified for non-normalizable and degenerate states; references added