US 12,079,688 B2
Generation of entangled photonic states
Mercedes Gimeno-Segovia, Palo Alto, CA (US)
Assigned to PSIQUANTUM CORP., Palo Alto, CA (US)
Appl. No. 17/266,076
Filed by PSIQUANTUM CORP., Palo Alto, CA (US)
PCT Filed Aug. 7, 2019, PCT No. PCT/US2019/045563
§ 371(c)(1), (2) Date Feb. 4, 2021,
PCT Pub. No. WO2020/033588, PCT Pub. Date Feb. 13, 2020.
Claims priority of provisional application 62/715,607, filed on Aug. 7, 2018.
Prior Publication US 2021/0295196 A1, Sep. 23, 2021
Int. Cl. G06N 10/00 (2022.01); H04B 10/70 (2013.01)
CPC G06N 10/00 (2019.01) [H04B 10/70 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A device comprising:
one or more photon detectors;
one or more waveguides having a plurality of sets of photonic modes, including:
a first set of photonic modes configured for outputting a first set of photons, wherein the first set of photonic modes is coupled with one or more photon sources, wherein the first set of photonic modes includes at least four photonic modes;
a second set of photonic modes coupled with the one or more photon detectors to provide a second set of photons to the one or more photon detectors, wherein the second set of photonic modes includes at least four photonic modes; and
a third set of photonic modes coupled with the one or more photon sources and coupled with the one or more photon detectors to provide a third set of photons to the one or more photon detectors, wherein the third set of photonic modes includes at least two photonic modes;
a first set of beam splitters coupling each mode of the first set of photonic modes to a respective mode of the second set of photonic modes;
a second set of beam splitters coupling each mode of the third set of photonic modes to a respective mode of the second set of photonic modes; and
wherein the first set of beam splitters and the second set of beam splitters are configured, via couplings between respective modes of the first set of photonic modes and the second set of photonic modes, to cause the first set of photonic modes to output, with a first non-zero probability, a pair of photons in a Bell state when a first number of photons is provided to respective inputs of the first set of photonic modes and the third set of photonic modes.