Single rubidium atom as quantum jump photodetector counts laser photons in 10^10 photons/s sunlight, matches rate-equation model, and achieves 0.5 bits per symbol in noisy channel with 150 probe photons per 10 ms against 1 nW sunlight.
P.et al.A single-atom quantum memory
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Integrated Eu3+:Y2SiO5 quantum memories in fiber and waveguide microcavities achieve record efficiencies of 80.3% for coherent pulses and 69.8% for heralded single photons while storing 20 temporal modes.
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Detection of photon-level signals embedded in sunlight with an atomic photodetector
Single rubidium atom as quantum jump photodetector counts laser photons in 10^10 photons/s sunlight, matches rate-equation model, and achieves 0.5 bits per symbol in noisy channel with 150 probe photons per 10 ms against 1 nW sunlight.
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Efficient integrated quantum memory for light
Integrated Eu3+:Y2SiO5 quantum memories in fiber and waveguide microcavities achieve record efficiencies of 80.3% for coherent pulses and 69.8% for heralded single photons while storing 20 temporal modes.