Closed Timelike Curves via Postselection: Theory and Experimental Test of Consistency
Name
Lloyd-2011-Closed Timelike Curv.pdf
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233.12 KB
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Checksum (MD5)
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Author(s)
Lloyd, Seth
Maccone, Lorenzo
Garcia-Patron Sanchez, Raul
Giovannetti, Vittorio
Shikano, Yutaka
Pirandola, Stefano
Rozema, Lee A.
Ardavan, Darabi
Soudagar, Yasaman
Shalm, Lynden K.
Steinberg, Aephraim M.
Date Issued
January 2011
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Lloyd, Seth, et al. "Closed Timelike Curves via Postselection: Theory and Experimental Test of Consistency." American Physical Society, 2011, 106:4, © 2011 The American Physical Society.
Version
Final published version
Abstract
Closed timelike curves (CTCs) are trajectories in spacetime that effectively travel backwards in time: a test particle following a CTC can interact with its former self in the past. A widely accepted quantum theory of CTCs was proposed by Deutsch. Here we analyze an alternative quantum formulation of CTCs based on teleportation and postselection, and show that it is inequivalent to Deutsch’s. The predictions or retrodictions of our theory can be simulated experimentally: we report the results of an experiment illustrating how in our particular theory the “grandfather paradox” is resolved.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
W. M. Keck Foundation Center for Extreme Quantum Information Theory
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.106.040403
