Simultaneous quantum transmission and teleportation of unknown photons using intra- and inter-particle entanglement controlled-NOT gates via cross-Kerr nonlinearity and P-homodyne measurements. (English) Zbl 1327.81089
Summary: We propose an arbitrary controlled-unitary (CU) gate and a simultaneous quantum transmission and teleportation (SQTTP) scheme. The proposed CU gate utilizes photons with cross-Kerr nonlinearities (XKNLs), coherent superposition states (CSSs) and P-homodyne detectors 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 strong CSSs and weak XKNLs are employed. Compared with the existing multi-qubit or controlled gates, which utilize XKNLs, coherent states, and X-homodyne detectors, the proposed CU gate can increase the feasibility of experimental realization, and enhance the robustness against the decoherence effect. Based on the CU gate, we present a SQTTP scheme that simultaneously transmits and teleports two unknown states of photons between two parties (Alice and Bob) using path-polarization intra-particle hybrid entanglement (IRHE) by transferring only a single photon. Consequently, it is possible to experimentally implement SQTTP with a certain success probability using the proposed CU gate.
MSC:
| 81P45 | Quantum information, communication, networks (quantum-theoretic aspects) |
| 81P40 | Quantum coherence, entanglement, quantum correlations |
| 81P15 | Quantum measurement theory, state operations, state preparations |
| 81V80 | Quantum optics |
| 78A60 | Lasers, masers, optical bistability, nonlinear optics |
Keywords:
simultaneous quantum transmission and teleportation; cross-Kerr nonlinearity; P-homodyne measurement; inter-particle and intra-particle hybrid entanglementReferences:
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