Quantum mechanics of time travel through post-selected teleportation
Name
Lloyd-2011-Quantum mechanics of time travel through post-.pdf
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Checksum (MD5)
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Author(s)
Maccone, Lorenzo
Garcia-Patron Sanchez, Raul
Giovannetti, Vittorio
Shikano, Yutaka
Lloyd, Seth
Date Issued
July 2011
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lloyd, Seth et al. “Quantum mechanics of time travel through post-selected teleportation.” Physical Review D 84 (2011): n. pag. Web. 8 Nov. 2011. © 2011 American Physical Society
Version
Final published version
Abstract
This paper discusses the quantum mechanics of closed-timelike curves (CTCs) and of other potential methods for time travel. We analyze a specific proposal for such quantum time travel, the quantum description of CTCs based on post-selected teleportation (P-CTCs). We compare the theory of P-CTCs to previously proposed quantum theories of time travel: the theory is inequivalent to Deutsch’s theory of CTCs, but it is consistent with path-integral approaches (which are the best suited for analyzing quantum-field theory in curved space-time). We derive the dynamical equations that a chronology-respecting system interacting with a CTC will experience. We discuss the possibility of time travel in the absence of general-relativistic closed-timelike curves, and investigate the implications of P-CTCs for enhancing the power of computation.
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
https://doi.org/10.1103/PhysRevD.84.025007
