Decoherence of encoded quantum registers

Details Decoherence of encoded quantum registers Decoherence of encoded quantum registers

2007-08-28

arxiv.org/abs/0708.3775v2

Phys. Rev. A 77, 012306 (2007)

Physics

Quantum Physics

13 pages, 9 figures

Scientific paper

10.1103/PhysRevA.77.012306

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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