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- W2964307679 abstract "Abstract We report an experiment in which long-lived quantum memories for photonic polarization qubits (PPQs) are controllably released into any one of multiple spatially-separate channels. The PPQs are implemented with an arbitrarily-polarized coherent signal light pulses at the single-photon level and are stored in cold atoms by means of electromagnetic-induced-transparency scheme. Reading laser pulses propagating along the direction at a small angle relative to quantum axis are applied to release the stored PPQs into an output channel. By changing the propagating directions of the read laser beam, we controllably release the retrieved PPQs into 7 different photonic output channels, respectively. At a storage time of δt = 5 μs , the least quantum-process fidelity in 7 different output channels is ~89%. At one of the output channels, the measured maximum quantum-process fidelity for the PPQs is 94.2% at storage time of δt = 0.85 ms . At storage time of 6 ms, the quantum-process fidelity is still beyond the bound of 78% to violate the Bell’s inequality. The demonstrated controllable release of the stored PPQs may extend the capabilities of the quantum information storage technique." @default.
- W2964307679 created "2019-07-30" @default.
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- W2964307679 date "2016-09-26" @default.
- W2964307679 modified "2023-10-16" @default.
- W2964307679 title "Controllably releasing long-lived quantum memory for photonic polarization qubit into multiple spatially-separate photonic channels" @default.
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- W2964307679 doi "https://doi.org/10.1038/srep33959" @default.
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