Practical limitations in optical entanglement purification

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Practical limitations in optical entanglement purification

Peter P. Rohde, Timothy C. Ralph, and William J. Munro

Phys. Rev. A 73, 030301(R) – Published 3 March 2006

Abstract

Entanglement purification protocols play an important role in the distribution of entangled systems, which is necessary for various quantum information processing applications. We consider the effects of photodetector efficiency and bandwidth, channel loss and mode mismatch on the operation of an optical entanglement purification protocol. We derive necessary detector and mode-matching requirements to facilitate practical operation of such a scheme, without having to resort to destructive coincidence-type demonstrations.

Received 30 November 2005

DOI:https://doi.org/10.1103/PhysRevA.73.030301

Authors & Affiliations

Peter P. Rohde^1,*, Timothy C. Ralph¹, and William J. Munro²

¹Centre for Quantum Computer Technology, Department of Physics, University of Queensland, Brisbane, QLD 4072, Australia
²Hewlett-Packard Laboratories, Filton Road, Stoke Gifford, Bristol BS34 8QZ, United Kingdom

^*Email address: rohde@physics.uq.edu.au; URL: http://www.physics.uq.edu.au/people/rohde/

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Vol. 73, Iss. 3 — March 2006

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Physical Review A

covering atomic, molecular, and optical physics and quantum information