Annihilation operators associated with unstable vacua in non-equilibrium thermo-field dynamics

• Published in: Condensed Matter Physics
• Date: 2008
• Main Authors: Yoshida, K., Arimitsu, T.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2008
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/119571
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Annihilation operators associated with unstable vacua in non-equilibrium thermo-field dynamics / K. Yoshida, T. Arimitsu // Condensed Matter Physics. — 2008. — Т. 11, № 4(56). — С. 687-697. — Бібліогр.: 15 назв. — англ.

Out of thermal equilibrium state, the vacuum is unstable and evolves in time. Consequently, the annihilation operators associated with the unstable vacuum depend on time. This dissipative time-evolution of quantum systems can be systematically treated, within the canonical operator formalism refer...