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Time-reversal frameness and superselection

Source: J. Math. Phys. 50, 102105 (2009); doi:10.1063/1.3243821

Published 19 October 2009

KEYWORDS and PACS
Keywords
PACS
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • YEAR: 2009
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Gilad Gour,1,2 Barry C. Sanders,1 and Peter S. Turner1,3
1Institute for Quantum Information Science, University of Calgary, Calgary, Alberta T2N 1N4, Canada
2Department of Mathematics and Statistics, University of Calgary, Calgary, Alberta T2N 1N4, Canada
3Department of Physics, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
We show that appropriate superpositions of motional states are a reference frame resource that enables breaking of time-reversal superselection so that two parties lacking knowledge about the other's direction of time can still communicate. We identify the time-reversal reference frame resource states and determine the corresponding frameness monotone, which connects time-reversal frameness to entanglement. In contradistinction to other studies of reference frame quantum resources, this is the first analysis that involves an antiunitary rather than unitary representation. ©2009 American Institute of Physics
History: Received 26 November 2008; accepted 10 September 2009; published 19 October 2009
Permalink: http://link.aip.org/link/?JMAPAQ/50/102105/1

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