US 11,972,323 B2
Apparatus and methods for gaussian boson sampling
Kamil Bradler, Toronto (CA); Daiqin Su, Toronto (CA); Nathan Killoran, Toronto (CA); Maria Schuld, Durban (ZA); Zachary Vernon, Toronto (CA); Lukas Helt, Toronto (CA); Blair Morrison, Toronto (CA); and Dylan Mahler, Toronto (CA)
Assigned to Xanadu Quantum Technologies Inc., Toronto (CA)
Filed by Xanadu Quantum Technologies Inc., Toronto (CA)
Filed on Jan. 27, 2023, as Appl. No. 18/102,402.
Application 18/102,402 is a continuation of application No. 17/512,086, filed on Oct. 27, 2021, granted, now 11,593,699.
Application 17/512,086 is a continuation of application No. PCT/CA2020/050675, filed on May 20, 2020.
Claims priority of provisional application 62/851,312, filed on May 22, 2019.
Prior Publication US 2023/0177374 A1, Jun. 8, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06N 10/00 (2022.01)
CPC G06N 10/00 (2019.01) 12 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a light source configured to provide a plurality of input optical modes in squeezed states of light;
a network of interconnected reconfigurable beam splitters (RBSs) in optical communication with the light source, the network of interconnected RBSs configured to perform a unitary transformation of the plurality of input optical modes to generate a plurality of output optical modes;
an array of photon counting detectors in optical communication with the network of interconnected RBSs, the array of photon counting detectors configured to measure a number of photons in each output optical mode from the plurality of the output optical modes after the unitary transformation; and
a controller operatively coupled to the light source and the network of interconnected RBSs, the controller configured to perform at least one of tuning an angle of the unitary transformation or tuning a phase of the unitary transformation to represent an adjacency matrix of a graph, each input optical mode in the plurality of input optical modes representing a vertex of the graph.