Chinese Optics Letters, 2009, 7 (1): 0182, Published Online: Mar. 4, 2009
Repeat-until-success measurement-based scheme for controlled phase gates in a cavity
偶极子诱导透明现象 光子分束器单光子干涉 受控相位门 270.5585 Quantum information and processing 230.1360 Beam splitters 040.5160 Photodetectors
Abstract
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.
Decun Li, Chunlan Han, Xunli Feng. Repeat-until-success measurement-based scheme for controlled phase gates in a cavity[J]. Chinese Optics Letters, 2009, 7(1): 0182.