Chinese Optics Letters, Volume. 7, Issue 1, 0182(2009)
Repeat-until-success measurement-based scheme for controlled phase gates in a cavity
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.
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Decun Li, Chunlan Han, Xunli Feng, "Repeat-until-success measurement-based scheme for controlled phase gates in a cavity," Chin. Opt. Lett. 7, 0182 (2009)
Received: May. 7, 2008
Accepted: --
Published Online: Mar. 4, 2009
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