Research team synchronizes single photons using an atomic quantum memory physrevlett
Photon synchronization scheme. Sketch of the experimental setup. Two pump fields continuously excite the atoms in the source module, which then emit signal and idler photons in two phase-matched directions via four-wave mixing.
Signal 1 photon in the first collection channel goes to the memory module, while the detection of idler 1 triggers the control storage pulse in the memory [generated by PCs]. Signal 2 in the second collection channel goes into a fiber delay line, while the detection of idler 2 triggers the control retrieval pulse, which releases signalfrom the memory synchronously with signal 2.
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