A robust quantummemory that stores information in a trapped-ion quantum network physrevlett
) and light arriving at the ion. State preparation is followed by a 100 ns delay to ensure that the beams are fully extinguished before the pulsed excitation. The 30 ns photon detection window begins 30 ns after the excitation pulse to allow for detector latency. A further 100 ns is required to decide whether to branch out of the attempt loop, in the event that a herald pattern is detected.Overview of apparatus.
Single pulses from a frequency-doubled mode-locked laser are split to simultaneously excite ions in Alice and Bob. The spontaneously emitted photons are collected into single-mode non-PM fibers, with wave plates directly after the fibers to rotate the polarization. The photons are then overlapped on aNPBS, and detected on single-mode-fiber-coupled APDs following PBSs.
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