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The rise and fall of redundancy in decoherence and quantum Darwinism

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dc.creator Riedel, C. Jess
dc.creator Zurek, Wojciech H.
dc.creator Zwolak, Michael
dc.date.accessioned 2013-05-23T22:24:54Z
dc.date.available 2012-09-17T20:23:20Z
dc.date.available 2013-05-23T22:24:54Z
dc.date.issued 2012-08-10
dc.identifier.uri http://hdl.handle.net/1957/33601
dc.description This is the publisher’s final pdf. The published article is copyrighted by IOP Publishing Ltd and Deutsche Physikalische Gesellschaft and can be found at: http://iopscience.iop.org/1367-2630. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. en_US
dc.description.abstract A state selected at random from the Hilbert space of a many-body system is overwhelmingly likely to exhibit highly non-classical correlations. For these typical states, half of the environment must be measured by an observer to determine the state of a given subsystem. The objectivity of classical reality—the fact that multiple observers can agree on the state of a subsystem after measuring just a small fraction of its environment—implies that the correlations found in nature between macroscopic systems and their environments are exceptional. Building on previous studies of quantum Darwinism showing that highly redundant branching states are produced ubiquitously during pure decoherence, we examine the conditions needed for the creation of branching states and study their demise through many-body interactions. We show that even constrained dynamics can suppress redundancy to the values typical of random states on relaxation timescales, and prove that these results hold exactly in the thermodynamic limit. en_US
dc.language.iso en_US en_US
dc.publisher IOP Publishing Ltd and Deutsche Physikalische Gesellschaft en_US
dc.relation.ispartofseries New Journal of Physics en_US
dc.relation.ispartofseries Vol. 14 no. 8 en_US
dc.rights Attribution-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nd/3.0/us/ *
dc.title The rise and fall of redundancy in decoherence and quantum Darwinism en_US
dc.type Article en_US
dc.description.peerreview yes en_US
dc.identifier.doi 10.1088/1367-2630/14/8/083010

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