DECOHERENCE AND RELAXATION OF TWO STRONGLY COUPLED SPIN 1/2 ATOMS

摘要

Decoherence of two coupled spin 1/2 atoms caused by the surrounding environment is studied via phase and energy relaxation using a quantum statistical model toward thermal equilibrium. The model is formulated microscopically using a master equation. Raman-type dissipation mechanisms are introduced in addition to the usual bilinear coupling between the coupled system and the reservoir. The effects of various rotating wave approximations for deriving the master equation are investigated. The decoherence process is compared with another strongly coupled dissipative system, the dissipative Jaynes Cummings Model.