Memory Effects in spin-chain channels for information transmission


Show simple item record Bayat, Abolfazl Burgarth, Daniel Klaus Mancini, Stefano Bose, Sougato 2011-09-26T14:39:03Z 2011-09-26T14:39:03Z 2008-05-22
dc.identifier.citation Bayat , A , Burgarth , D K , Mancini , S & Bose , S 2008 , ' Memory Effects in spin-chain channels for information transmission ' Physical Review A , vol 77 , 050306(R) . , 10.1103/PhysRevA.77.050306 en
dc.identifier.issn 1050-2947
dc.identifier.other PURE: 171438
dc.identifier.other dspace: 2160/7603
dc.description Bayat, A., Burgarth, D., Mancini, S., Bose, S. (2008). Memory Effects in spin-chain channels for information transmission. Physical Review A, 77, Article No: 050306(R) en
dc.description.abstract We investigate the multiple use of a ferromagnetic spin chain for quantum and classical communications without resetting. We find that the memory of the state transmitted during the first use makes the spin chain a qualitatively different quantum channel during the second transmission, for which we find the relevant Kraus operators. We propose a parameter to quantify the amount of memory in the channel and find that it influences the quality of the channel, as reflected through fidelity and entanglement transmissible during the second use. For certain evolution times, the memory allows the channel to exceed the memoryless classical capacity (achieved by separable inputs) and in some cases it can also enhance the quantum capacity. en
dc.format.extent 4 en
dc.language.iso eng
dc.relation.ispartof Physical Review A en
dc.title Memory Effects in spin-chain channels for information transmission en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Quantum Systems, Information and Control en
dc.contributor.institution Institute of Mathematics & Physics (ADT) en
dc.description.status Peer reviewed en

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