Concept of Quasiparticle in Thermofield Dynamics for Nonequilibrium Systems

D. N. Zubarev, М. В. Токарчук

E. Ahmed

Steven B. Kaplan

Daniel S. Kosov

Based on the formalism of thermofield dynamics we propose a concept of nonequilibrium Fock space and nonequilibrium quasiparticles for quantum many-body system in nonequilibrium steady state. We develop a general theory as well as demonstrate the utility of the approach on the example of electron transport through the interacting region. The proposed approach is compatible with advanced quantum chemical methods of electronic structure calculations such as coupled cluster theory and configuration interaction.

Daniel S. Kosov

Based on the formalism of thermofield dynamics we propose a concept of nonequilibrium Fock space and nonequilibrium quasiparticles for quantum many-body system in nonequilibrium steady state. We develop a general theory as well as demonstrate the utility of the approach on the example of electron transport through the interacting region. The proposed approach is compatible with advanced quantum chemical methods of electronic structure calculations such as coupled cluster theory and configuration interaction.

Toshihico Arimitsu

The thermal processes in the hydrodynamic stage are investigated within the formalism of nonequilibrium thermofield dynamics (NETFD) where the concepts in nonequilibrium thermodynamics are implanted. The treatment gives a good indication for an understanding of the new concept, the spontaneous creation of dissipation, in conjunction with the realization of the representation space within NETFD.