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arXiv · 0708.3775

Decoherence of encoded quantum registers

Stefan Borghoff·Rochus Klesse
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Abstract

In order to eliminate disturbing effects of decoherence, encoding of quantum information in decoherence-free subspaces has been suggested. We analyze the benefits of this concept for a quantum register that is realized in a spin chain in contact with a common bosonic bath. Within a dissipation-less model we provide explicit analytical results for the average fidelity of plain and encoded quantum registers. For the investigation of dissipative spin-boson couplings we employ a master equation of Bloch-Redfield type.

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Stefan Borghoff, Rochus Klesse. 2008-02-05. Decoherence of encoded quantum registers. https://doi.org/10.1103/physreva.77.012306

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