Short-Time Decoherence for General System-Environment Interactions

Details Short-Time Decoherence for General System-Environment Interactions Short-Time Decoherence for General System-Environment Interactions

2004-03-15

arxiv.org/abs/cond-mat/0403348v1

Phys. Rev. A 69, article 062309, 7 pages (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 2 figures

Scientific paper

10.1103/PhysRevA.69.062309

Short time approximation is developed for system-environmental bath mode interactions involving a general non-Hermitian system operator $\Lambda$, and its conjugate, $\Lambda^\dagger$, in order to evaluate onset of decoherence at low temperatures in quantum systems interacting with environment. The developed approach is complementary to Markovian approximations and appropriate for evaluation of quantum computing schemes. Example of a spin system coupled to a bosonic heat bath via $\Lambda \propto \sigma_-$ is worked out in detail.

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