We present a fast and compact multichannel coincidence unit to count all possible single and coincidence detection events in an experiment with eight single-photon detectors at once. Using high-speed electronics and a microcontroller, this device is able to process up to 800000events∕s. The coincidence window can be tuned within a range of 4–12ns. The device can be easily scaled to any number of input channels and is thus ideally suited for efficient multiphoton quantum information processing.
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Gaertner et al. (2005) studied this question.
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