Generalized invariants and quantum evolution of open fermionic systems

Authors
Kim, SP Santana, AE Khanna, FC
Citation
Sp. Kim et al., Generalized invariants and quantum evolution of open fermionic systems, PHYS LETT A, 272(1-2), 2000, pp. 46-52
Citations number
15
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
03759601 → ACNP
Volume
272
Issue
1-2
Year of publication
2000
Pages
46 - 52
Database
ISI
SICI code
0375-9601(20000717)272:1-2<46:GIAQEO>2.0.ZU;2-W
Abstract
Open systems acquire time-dependent coupling constants through interaction with an external field or environment. We generalize the Lewis-Riesenfeld i nvariant theorem to open system of quantum fields after second quantizarion . The generalized invariants and thereby the quantum evolution are found ex plicity 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.