Multi-particle decoherence free subspaces in extended systems

Details Multi-particle decoherence free subspaces in extended systems Multi-particle decoherence free subspaces in extended systems

2007-02-26

arxiv.org/abs/quant-ph/0702244v1

Phys. Rev. A 76, 012331 (2007)

Physics

Quantum Physics

12 pages, 2 figures

Scientific paper

10.1103/PhysRevA.76.012331

We develop a method to determine spatial configurations to realize decoherence-free subspaces for spatially extended multi-particle systems. We have assumed normal reservoir behavior including translational invariance of the reservoir and preparation in stationary states or mixture thereof and weak Markovian system-reservoir coupling that requires energy transfer. One important outcome of our method is a proof that there does not exist a multi-particle decoherence-free subspace in such systems except in the limit that the spatial extent of the system becomes infinitesimal.

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