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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 1 — Jan. 1, 2006
  • pp: 107–109

Interconvertibility of single-rail optical qubits

Dominic W. Berry, A. I. Lvovsky, and Barry C. Sanders  »View Author Affiliations

Optics Letters, Vol. 31, Issue 1, pp. 107-109 (2006)

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We show how to convert between partially coherent superpositions of a single photon with the vacuum by using linear optics and postselection based on homodyne measurements. We introduce a generalized quantum efficiency for such states and show that any conversion that decreases this quantity is possible. We also prove that our scheme is optimal by showing that no linear optical scheme with generalized conditional measurements, and with one single-rail qubit input, can improve the generalized efficiency.

© 2006 Optical Society of America

OCIS Codes
(270.5290) Quantum optics : Photon statistics
(270.5570) Quantum optics : Quantum detectors

ToC Category:
Quantum Optics

Dominic W. Berry, A. I. Lvovsky, and Barry C. Sanders, "Interconvertibility of single-rail optical qubits," Opt. Lett. 31, 107-109 (2006)

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