Multiparticle decoherence-free subspaces in extended systems | Zendy

Raisa I. Karasik | Zendy; Karl-Peter Marzlin | Zendy; Barry C. Sanders | Zendy; K. Birgitta Whaley | Zendy

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Multiparticle decoherence-free subspaces in extended systems

Author(s) -

Raisa I. Karasik,

Karl-Peter Marzlin,

Barry C. Sanders,

K. Birgitta Whaley

Publication year - 2007

Publication title -

physical review a

Language(s) - English

Resource type - Journals

eISSN - 1094-1622

pISSN - 1050-2947

DOI - 10.1103/physreva.76.012331

Subject(s) - quantum decoherence , physics , subspace topology , decoherence free subspaces , linear subspace , statistical physics , coupling (piping) , infinitesimal , limit (mathematics) , markov process , quantum mechanics , open quantum system , quantum , pure mathematics , quantum error correction , mathematical analysis , mathematics , mechanical engineering , statistics , engineering

We develop a method to determine spatial configurations to realizedecoherence-free subspaces for spatially extended multi-particle systems. Wehave assumed normal reservoir behavior including translational invariance ofthe reservoir and preparation in stationary states or mixture thereof and weakMarkovian system-reservoir coupling that requires energy transfer. Oneimportant outcome of our method is a proof that there does not exist amulti-particle decoherence-free subspace in such systems except in the limitthat the spatial extent of the system becomes infinitesimal.Comment: 12 pages, 2 figure

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