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Bogoliubov transformation for quantum fields in (Bbb S1)d × Bbb RD−d topology and applications to the Casimir effect
(2009)
A Bogoliubov transformation accounting simultaneously for spatial compactifica-tion and thermal effects is introduced. The fields are described in a ΓDd = Bbb S11 × ... × Bbb S1d × Bbb RD−d topology, and the Bogoliubov ...
Generalized bogoliubov transformation for confined fields: applications for the casimir effect
(2002-11)
The Bogoliubov transformation in thermofield dynamics, an operator formalism for the finite-temperature quantum field theory, is generalized to describe a field in arbitrary confined regions of space and time. Starting ...
O operador espalhamento para férmions num campo externo em Thermofield Dynamics
(Universidade Estadual Paulista (UNESP), 2014)
O operador espalhamento para férmions num campo externo em Thermofield Dynamics
(Universidade Estadual Paulista (Unesp), 2002-08)
O método de segunda quantificação é utilizado para construir o operador espalhamento S no espaço de Fock, no contexto de Thermofield Dynamics (TFD), para o campo de Dirac sujeito a um potencial eletromagnético externo ...
O operador espalhamento para férmions num campo externo em Thermofield Dynamics
(Universidade Estadual Paulista (Unesp), 2002-08)
O método de segunda quantificação é utilizado para construir o operador espalhamento S no espaço de Fock, no contexto de Thermofield Dynamics (TFD), para o campo de Dirac sujeito a um potencial eletromagnético externo ...
A Magnus approximation approach to harmonic systems with time-dependent frequencies
(Academic Press Inc Elsevier Science, 2018-12)
We use a Magnus approximation at the level of the equations of motion for a harmonic system with a time-dependent frequency, to find an expansion for its in–out effective action, and a unitary expansion for the Bogoliubov ...
SU(1,1) thermal group of bosonic strings and D-branes
(American Physical Soc, 2002-09-15)
All possible Bogoliubov operators that generate the thermal transformations in thermo field dynamics form an SU(1,1) group. We discuss this construction in the bosonic string theory. In particular, the transformation of ...
SU(1,1) thermal group of bosonic strings and D-branes
(American Physical Soc, 2002-09-15)
All possible Bogoliubov operators that generate the thermal transformations in thermo field dynamics form an SU(1,1) group. We discuss this construction in the bosonic string theory. In particular, the transformation of ...