Quantum cloning of continuous-variable entangled states

Weedbrook, Christian, Grosse, Nicolai B., Symul, Thomas, Lam, Ping Koy and Ralph, Timothy C. (2008) Quantum cloning of continuous-variable entangled states. Physical Review A, 77 5: . doi:10.1103/PhysRevA.77.052313

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Author Weedbrook, Christian
Grosse, Nicolai B.
Symul, Thomas
Lam, Ping Koy
Ralph, Timothy C.
Title Quantum cloning of continuous-variable entangled states
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 2008-05-13
Year available 2008
Sub-type Article (original research)
DOI 10.1103/PhysRevA.77.052313
Open Access Status File (Publisher version)
Volume 77
Issue 5
Total pages 12
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract We consider the quantum cloning of continuous variable entangled states. This is achieved by introducing two symmetric entanglement cloning machines (or e-cloners): a local e-cloner and a global e-cloner; where we look at the preservation of entanglement in the clones under the condition that the fidelity of the clones is maximized. These cloning machines are implemented using simple linear optical elements such as beam splitters and homodyne detection along with squeeze gates. We show that the global e-cloner out-performs the local e-cloner both in terms of the fidelity of the cloned states as well as the strength of the entanglement of the clones. There is a minimum strength of entanglement (3 dB using the inseparability criterion) of the input state of the global e-cloner that is required to preserve the entanglement in the clones.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Optics
Physics
OPTICS
PHYSICS, ATOMIC, MOLECULAR & CHEMICAL
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mathematics and Physics
School of Physical Sciences Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 13 times in Scopus Article | Citations
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Created: Thu, 07 Aug 2008, 20:23:47 EST by Thelma Whitbourne on behalf of School of Mathematics & Physics