Long-time death of nonclassicality of a cavity field interacting with a charge qubit and its own reservoir. (English) Zbl 1238.81033
Summary: A measure of nonclassicality of quantum states based on the negative values of the Wigner function (\(WF\)) of a charge qubit-field system is proposed. It is found that, the negative values of the field \(WF\) are very sensitive to any change in dissipation parameter. The dissipation leads to a long-time death for both entanglement and nonclassicality, and also the coherence of the cavity state is lost completely.
MSC:
| 81P40 | Quantum coherence, entanglement, quantum correlations |
| 81V80 | Quantum optics |
| 81S22 | Open systems, reduced dynamics, master equations, decoherence |
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