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Coherent population trapping in the stochastic limit | L.Accardi
; S.V.Kozyrev
; | Date: |
31 Mar 2003 | Subject: | quant-ph | Abstract: | A 2-level atom with degenerate ground state interacting with a quantum field is investigated. We show, that the field drives the state of the atom to a stationary state, which is non-unique, but depends on the initial state of the system through some conserved quantities. This non-uniqueness follows from the degeneracy of the ground state of the atom, and when the ground subspace is two-dimensional, the family of stationary states will depend on a one-dimensional parameter. Only one of the stationary states in this family is a pure state, and this state coincides with the known non-coupled population trapped state (zero population in the excited level. Another one stationary state corresponds to an equal weight mixture of the excited level and of the coupled state. | Source: | arXiv, quant-ph/0303185 | Services: | Forum | Review | PDF | Favorites |
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