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Quantum Computing

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Patent 10379420


Issued 2019-08-13

Clock Generation For A Photonic Quantum Computer To Convert Electrical Pulses Into A Plurality Of Clock Signals

A system for generating clock signals for a photonic quantum computing system includes a pump photon source configured to generate a plurality of pump photon pulses at a first repetition rate, a waveguide optically coupled to the pump photon source, and a photon-pair source optically coupled to the first waveguide. The system also includes a photodetector optically coupled to the photon-pair source and configured to generate a plurality of electrical pulses in response to detection of at least a portion of the plurality of pump photon pulses at the first repetition rate and a clock generator coupled to the photodetector and configured to convert the plurality of electrical pulses into a plurality of clock signals at the first repetition rate.


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2 Independent Claims

  • Independent Claim 1. A system for generating clock signals for a photonic quantum computing system disposed inside a cryostat, the system comprising: a pump photon source disposed outside thecryostat, the pump photon source configured to generate a plurality of pump photon pulses at a first repetition ratea waveguide optically coupled to the pump photon sourcea photon-pair source disposed inside the cryostat and optically coupled tothe waveguide, the photon-pair source configured to: receive the plurality of pump photon pulses via the waveguideconvert a first portion of each of a subset of the plurality of pump photon pulses into a photon pairoutput the photon pairs convertedfrom the subset of the plurality of pump photon pulsesand output a second portion of each pump photon pulse of the plurality of pump photon pulsesa photodetector disposed inside the cryostat and configured to: receive the second portion of eachpump photon pulse of the plurality of pump photon pulsesand generate a plurality of electrical pulses by converting the second portion of each pump photon pulse of the plurality of pump photon pulses into a respective electrical pulse of the pluralityof electrical pulsesand a clock generator disposed inside the cryostat and electrically coupled to the photodetector, the clock generator configured to convert the plurality of electrical pulses generated by the photodetector into a plurality of clocksignals at the first repetition rate.

  • Independent Claim 4. A system for generating clock signals for a photonic quantum computing system, the system comprising: a pump photon source configured to generate a plurality of pump photon pulses at a first repetition ratea waveguide optically coupled tothe pump photon sourcea photon-pair source optically coupled to the waveguidea photodetector optically coupled to the photon-pair source and configured to generate a plurality of electrical pulses in response to detection of at least a portion ofthe plurality of pump photon pulses at the first repetition rateand a clock generator coupled to the photodetector and configured to convert the plurality of electrical pulses into a plurality of clock signals at the first repetition rate.