Unitary solution to a quantum gravity information paradox

Ralph, T. C. (2007) Unitary solution to a quantum gravity information paradox. Physical Review A, 76 1: 012336-1-012336-5. doi:10.1103/PhysRevA.76.012336

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Author Ralph, T. C.
Title Unitary solution to a quantum gravity information paradox
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2007-07-30
Year available 2007
Sub-type Article (original research)
DOI 10.1103/PhysRevA.76.012336
Open Access Status File (Publisher version)
Volume 76
Issue 1
Start page 012336-1
End page 012336-5
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2008
Language eng
Abstract We consider a toy model of the interaction of a qubit with an exotic space-time containing a timelike curve. Consistency seems to require that the global evolution of the qubit be nonunitary. Given that quantum mechanics is globally unitary, this then is an example of a quantum gravity information paradox. However, we show that a careful analysis of the problem in the Heisenberg picture reveals an underlying unitarity, thus resolving the paradox.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Q-Index Code C1

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Created: Tue, 08 Apr 2008, 11:11:33 EST by Jenny Robinson on behalf of School of Mathematics & Physics