Aspectos dinamicos de sistemas quanticos abertos

AUTOR(ES)
DATA DE PUBLICAÇÃO

1999

RESUMO

Dynamical aspects of three open quantum systems are examined. In the problem of quantum particle trapping by oscillating fields there is the evidence of movement stabilization and the quadrature-squeezing degradation for the quantum particle, due to the dissipative action of the environment over the particle. In the problem of information transfer occuring in the course of quantum interactions it is shown that, besides the joint state recurrence, there is also the existence of subsystem state-identity exchange due to the maximum information transfer. It is shown that under specific conditions information transfer may occur between the subsystems at constant energy. In the problem of continuously pumped non-ideal superconduting cavity field states generation and detection it is considered the dissipative effect due to the coupling of the cavity field with its environment. Some new strategies for field-Schrödinger-cat-state coherence control and new aspects of measurement of coherence and degradation of the quantum states are described

ASSUNTO(S)

sistemas abertos (fisica) teoria quantica de campos

ACESSO AO ARTIGO

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