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Decoherence of a quantum memory coupled to a collective spin bath

Abstract:

We study the quantum dynamics of a single qubit coupled to a bath of interacting spins as a model for decoherence in solid state quantum memories. The spin bath is described by the Lipkin-Meshkov-Glick model and the bath spins are subjected to a transverse magnetic field. We investigate the qubit interacting via either an Ising- or an XY-type coupling term to subsets of bath spins of differing size. The large degree of symmetry of the bath allows us to find parameter regimes where the initial...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1142/S0219749910005934

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Role:
Author
More by this author
Institution:
University of Oxford
Department:
Oxford
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Role:
Author
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Name:
Engineering and Physical Sciences Research Council
Publisher:
World Scientific Publishing Company
Journal:
International Journal of Quantum Information More from this journal
Volume:
8
Issue:
1-2
Pages:
271-294
Publication date:
2009-07-08
DOI:
EISSN:
1793-6918
ISSN:
0219-7499
Keywords:
Pubs id:
pubs:168688
UUID:
uuid:0721a71d-d914-4af3-8138-8206b95de31d
Local pid:
pubs:168688
Source identifiers:
168688
Deposit date:
2013-03-20

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