Active Temporal Multiplexing of Photons

Gabriel J. Mendoza, Raffaele Santagati, Jack Munns, Elizabeth Hemsley, Mateusz Piekarek, Enrique Martin-Lopez, Graham D. Marshall, Damien Bonneau, Mark G. Thompson, Jeremy L. O'Brien

Research output: Contribution to journalArticle (Academic Journal)

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Quantum information science promises powerful new technologies and fundamental scientific discoveries. Photonic qubits are appealing for their low noise properties-the cost is the non-deterministic nature of many processes, including photon generation and entanglement. Active multiplexing can increase the success probability of such processes above a required threshold, and spatial multiplexing of up to four heralded photon sources shows great promise. The cost is a proliferation of hardware. Temporal multiplexing-repeated use of the same hardware components-has been proposed as an alternative and is likely to be essential to greatly reduce resource complexity and system sizes. Requirements include the precise synchronization of a system of low-loss switches, delay lines, fast photon detectors, and feed-forward. Here we demonstrate multiplexing of 8 'bins'-four temporal and two spatial-from a heralded photon source. We show enhanced photon emission statistics, observing an increase in both the triggering and heralded photon rates. Despite its current limitations due to extrinsic sources of loss, this system points the way to harnessing temporal multiplexing in quantum technologies, from single-photon sources to large-scale computation.
Original languageUndefined/Unknown
Number of pages15
Publication statusIn preparation - 4 Mar 2015


  • quant-ph

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