Criteria for dynamically stable decoherence-free subspaces and incoherently generated coherences

Details Criteria for dynamically stable decoherence-free subspaces and incoherently generated coherences Criteria for dynamically stable decoherence-free subspaces and incoherently generated coherences

2007-02-26

arxiv.org/abs/quant-ph/0702243v3

Phys. Rev. A 77(5), 052301 (2008)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.77.052301

We present a detailed analysis of decoherence free subspaces and develop a rigorous theory that provides necessary and sufficient conditions for dynamically stable decoherence free subspaces. This allows us to identify a special class of decoherence free states which rely on incoherent generation of coherences. We provide examples of physical systems that support such states. Our approach employs Markovian master equations and applies primarily to finite-dimensional quantum systems.

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