Quantum-state cloning in the presence of a closed timelike curve

Ahn, D., Myers, C. R., Ralph, T. C. and Mann, R. B. (2013) Quantum-state cloning in the presence of a closed timelike curve. Physical Review A, 88 2: 022332.1-022332.5. doi:10.1103/PhysRevA.88.022332

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Author Ahn, D.
Myers, C. R.
Ralph, T. C.
Mann, R. B.
Title Quantum-state cloning in the presence of a closed timelike curve
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2013-08-01
Sub-type Article (original research)
DOI 10.1103/PhysRevA.88.022332
Open Access Status File (Publisher version)
Volume 88
Issue 2
Start page 022332.1
End page 022332.5
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract Using the Deutsch model of closed timelike curves, we show that a universal cloner can be constructed that when acting on a completely arbitrary qubit state, exceeds the no-cloning bound for fidelity. Since the no-cloning theorem has played a central role in the development of quantum information science, it is clear that the existence of closed timelike curves that behave according to Deutsch's model would radically change the rules for quantum information technology. Nevertheless, we show that this type of cloning does not violate no-signaling criteria.
Keyword Mechanics
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
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Created: Sun, 22 Sep 2013, 10:13:06 EST by System User on behalf of School of Mathematics & Physics