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APS » Journals » Phys. Rev. A » Volume 69 » Issue 4
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Phys. Rev. A 69, 042313 (2004) [6 pages]

Optimal cloning for finite distributions of coherent states

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P. T. Cochrane* and T. C. Ralph
Department of Physics, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia

A. Dolińska
Quantum Optics Group, Department of Physics, Faculty of Science, Australian National University, ACT 0200, Australia

Received 17 November 2003; published 20 April 2004

We derive optimal cloning limits for finite Gaussian distributions of coherent states and describe techniques for achieving them. We discuss the relation of these limits to state estimation and the no-cloning limit in teleportation. A qualitatively different cloning limit is derived for a single-quadrature Gaussian quantum cloner.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.69.042313
DOI:
10.1103/PhysRevA.69.042313
PACS:
03.67.Hk

*Electronic address: cochrane@physics.uq.edu.au

 
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