Quantum state stability against decoherence

Details Quantum state stability against decoherence Quantum state stability against decoherence

2006-05-31

arxiv.org/abs/quant-ph/0605254v1

Physics

Quantum Physics

Scientific paper

We study the stability of the coherence of a state of a quantum system under the effect of an interaction with another quantum system at short time. We find an expression for evaluating the order of magnitude of the time scale for the onset of instability as a function of the initial state of both involved systems and of the sort of interaction between them. As an application we study the spin-boson interaction in the dispersive interaction regime, driven by a classical field. We find, for this model, that the behavior of the time scale for the onset of instability, with respect to the boson bath temperature, changes depending on the intensity of the classical field.

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