Bidirectional quantum teleportation of unknown photons using path-polarization intra-particle hybrid entanglement and controlled-unitary gates via cross-Kerr nonlinearity  

作　　者：Jino Heo Chang-Ho Hong Jong-In Lim Hyung-Jin Yang 

机构地区：[1]Graduate School of Information Security (GSIS), Korea University [2]Center for Information Security Technologies (CIST), Korea University [3]Department of Physics, Korea University

出　　处：《Chinese Physics B》2015年第5期210-222,共13页中国物理B（英文版）

基　　金：supported by the Ministry of Science,ICT&Future Planning,Korea,under the C-ITRC(Convergence Information Technology Research Center)Support program(NIPA-2013-H0301-13-3007)supervised by the National IT Industry Promotion Agency

摘　　要：We propose an arbitrary controlled-unitary （CU） gate and a bidirectional quantum teleportation （BQTP） scheme. The proposed CU gate utilizes photonic qubits （photons） with cross-Kerr nonlinearities （XKNLs）, X-homodyne detectors, and linear optical elements, and consists of the consecutive operation of a controlled-path （C-path） gate and a gathering-path （G- path） gate. It is almost deterministic and feasible with current technology when a strong coherent state and weak XKNLs are employed. Based on the CU gate, we present a BQTP scheme that simultaneously teleports two unknown photons between distant users by transmitting only one photon in a path-polarization intra-particle hybrid entangled state. Consequently, it is possible to experimentally implement BQTP with a certain success probability using the proposed CU gate.We propose an arbitrary controlled-unitary （CU） gate and a bidirectional quantum teleportation （BQTP） scheme. The proposed CU gate utilizes photonic qubits （photons） with cross-Kerr nonlinearities （XKNLs）, X-homodyne detectors, and linear optical elements, and consists of the consecutive operation of a controlled-path （C-path） gate and a gathering-path （G- path） gate. It is almost deterministic and feasible with current technology when a strong coherent state and weak XKNLs are employed. Based on the CU gate, we present a BQTP scheme that simultaneously teleports two unknown photons between distant users by transmitting only one photon in a path-polarization intra-particle hybrid entangled state. Consequently, it is possible to experimentally implement BQTP with a certain success probability using the proposed CU gate.

关 键 词：cross-Kerr nonlinearity bidirectional quantum teleportation intra-particle hybrid entanglement 

分 类 号：O431.2[机械工程—光学工程] TN929.11[理学—光学]