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Telecloning of continuous quantum variables

van Loock, P. and Braunstein, S.L. (2001) Telecloning of continuous quantum variables. Physical Review Letters, 87 (24). pp. 247901-1. ISSN 0031-9007

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We propose entangled (M+1)-mode quantum states as a multiuser quantum channel for continuous-variable communication. Arbitrary quantum states can be sent via this channel simultaneously to M remote and separated locations with equal minimum excess noise in each output mode. For a set of coherent-state inputs, the channel realizes optimal symmetric 1→M cloning at a distance (“telecloning”). It also provides the optimal cloning of coherent states without the need of amplifying the state of interest. The generation of the multiuser quantum channel requires no more than two 10log10{(sqrt[M]-1)/(sqrt[M]+1)} dB squeezed states and M beam splitters.

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Computer Science (York)
Depositing User: York RAE Import
Date Deposited: 25 Feb 2009 11:57
Last Modified: 25 Feb 2009 11:57
Published Version: http://dx.doi.org/10.1103/PhysRevLett.87.247901
Status: Published
Publisher: American Physical Society
Identification Number: 10.1103/PhysRevLett.87.247901
URI: http://eprints.whiterose.ac.uk/id/eprint/7227

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