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- W2897748026 abstract "A source that can generate atom-photon quantum correlations or entanglement based on a quantum memory is a basic building block of quantum repeaters (QRs). To achieve high entanglement generation rates in ensemble-based QRs, spatial-, temporal-, and spectral-multimode memories are needed. Previous temporal-multimode memories are based on rephasing mechanisms in inhomogeneously broadened media. Here, by applying a train of write pulses in time, with each pulse coming from a different direction, to a homogeneously broadened atomic ensemble to induce Duan-Lukin-Cirac-Zoller-like Raman processes, we prepare up to 19 pairs of modes, namely, one spin-wave mode and one photonic time bin. Spin-wave-photon (i.e., atom-photon) entanglement is probabilistically produced in these mode pairs. Based on the stored spin-wave modes together with feedforward-controlled readout, we build a temporally multiplexed source and then demonstrate an 18.8-fold increase in the probability of the generation of spin-wave-photon entanglement compared to the sources that use individual modes. The measured Bell parameter for the multiplexed source is $2.30ifmmodepmelsetextpmfi{}0.02$, and the memory lifetime is 30 ensuremath{mu}s." @default.
- W2897748026 created "2018-10-26" @default.
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- W2897748026 date "2019-07-25" @default.
- W2897748026 modified "2023-10-14" @default.
- W2897748026 title "Multiplexed spin-wave–photon entanglement source using temporal multimode memories and feedforward-controlled readout" @default.
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- W2897748026 doi "https://doi.org/10.1103/physreva.100.012342" @default.
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