Decoherence suppression via environment preparation

Details Decoherence suppression via environment preparation Decoherence suppression via environment preparation

2009-08-06

arxiv.org/abs/0908.0958v1

Phys. Rev. A 80, 062319 (2009) [6 pages]

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevA.80.062319

To protect a quantum system from decoherence due to interaction with its environment, we investigate the existence of initial states of the environment allowing for decoherence-free evolution of the system. For models in which a two-state system interacts with a dynamical environment, we prove that such states exist if and only if the interaction and self-evolution Hamiltonians share an eigenstate. If decoherence by state preparation is not possible, we show that initial states minimizing decoherence result from a delicate compromise between the environment and interaction dynamics.

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