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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 7, Iss. 1 — Jan. 1, 2009
  • pp: 82–84

Repeat-until-success measurement-based scheme for controlled phase gates in a cavity

Decun Li, Chunlan Han, and Xunli Feng  »View Author Affiliations

Chinese Optics Letters, Vol. 7, Issue 1, pp. 82-84 (2009)

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We propose a new repeat-until-success (RUS) measurement-based scheme to implement quantum controlled phase gates according to the effect of dipole-induced-transparency (DIT) in a cavity and single-photon interference at a 50:50 beam-splitter. In our scheme, the DIT effect can appropriately attach a photon to the state of the dipoles according to their initial state, and in this way, a suitably encoded dipole-photon state is thus prepared. The measurement of the photon after it passing through a 50:50 beam-splitter can project the encoded matter-photon state to either a desired phase gate operation for the matter qubits or to their initial states. The recurrence of the initial state permits us to implement the desired entangling gate in a RUS way.

© 2009 Chinese Optics Letters

OCIS Codes
(040.5160) Detectors : Photodetectors
(230.1360) Optical devices : Beam splitters
(270.5585) Quantum optics : Quantum information and processing

Decun Li, Chunlan Han, and Xunli Feng, "Repeat-until-success measurement-based scheme for controlled phase gates in a cavity," Chin. Opt. Lett. 7, 82-84 (2009)

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