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Stochastic Resonance phenomena in spin chains

Rivas, Á; Oxtoby, N; Huelga, S; (2009) Stochastic Resonance phenomena in spin chains. The European Physical Journal B - Condensed Matter and Complex Systems , 69 , Article 1. 10.1140/epjb/e2009-00108-5.

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Abstract

We discuss stochastic resonance-like effects in the context of coupled quantum spin systems. We focus here on an information-theoretic approach and analyze the steady state quantum correlations (entanglement) as well as the global correlations in the system when subject to different forms of local decoherence. In the presence of decay, it has been shown that the system displays quantum correlations only when the noise strength is above a certain threshold. We extend this result to the case of a Heisenberg XYZ exchange interaction and revise and clarify the mechanisms underlying this behaviour. In the presence of pure dephasing, we show that the system always remains separable in the steady state. When both types of noise are present, we show that the system can still exhibit entanglement for long times, provided that the pure dephasing rate is not too large.

Type:Article
Title:Stochastic Resonance phenomena in spin chains
DOI:10.1140/epjb/e2009-00108-5
Publisher version:http://www.springerlink.com/content/dg4075504351v536/
Additional information:affiliation: University of Hertfordshire date-added: 2012-10-05 15:38:01 +0100 date-modified: 2012-10-05 15:38:01 +0100 local-url: file://localhost/Users/noxtoby/ULiverpool/Research/Bibliography/Papers/2009/Rivas/The%20European%20Physical%20Journal%20B%20-%20Condensed%20Matter%20and%20Complex%20Systems%202009%20Rivas.pdf pmid: related:koiZy72Z-oYJ rating: 0 uri: papers://882D03DD-F38B-407A-89D5-D97332E09FA2/Paper/p716 bdsk-file-1: 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 bdsk-url-1: http://www.springerlink.com/content/dg4075504351v536/ bdsk-url-2: http://dx.doi.org/10.1140/epjb/e2009-00108-5
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Computer Science

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