Relativistic quantum information and time machines

Ralph, Timothy C. and Downes, Tony G. (2012) Relativistic quantum information and time machines. Contemporary Physics, 53 1: 1-16. doi:10.1080/00107514.2011.640146

Author Ralph, Timothy C.
Downes, Tony G.
Title Relativistic quantum information and time machines
Journal name Contemporary Physics   Check publisher's open access policy
ISSN 0010-7514
Publication date 2012
Year available 2011
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1080/00107514.2011.640146
Volume 53
Issue 1
Start page 1
End page 16
Total pages 16
Place of publication Colchester, Essex, United Kingdom
Publisher Taylor & Francis
Collection year 2013
Language eng
Abstract Relativistic quantum information combines the informational approach to understanding and using quantum mechanical systems – quantum information – with the relativistic view of the Universe. In this introductory review we examine key results to emerge from this new field of research in physics and discuss future directions. A particularly active area recently has been the question of what happens when quantum systems interact with general relativistic closed timelike curves – effectively time machines. We discuss two different approaches that have been suggested for modelling such situations. It is argued that the approach based on matching the density operator of the quantum state between the future and past most consistently avoids the paradoxes usually associated with time travel.
Keyword Quantum information
Quantum communication
Space-time curvature
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 16 Dec 2011

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: School of Mathematics and Physics
Official 2013 Collection
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 10 times in Scopus Article | Citations
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