US 12,288,136 B2
Systems and methods for compressed sensing measurement of long-range correlated noise
Seyed Alireza Seif Tabrizi, Adelphi, MD (US); Mohammad Hafezi, Washington, DC (US); and Yi-Kai Liu, Gaithersburg, MD (US)
Assigned to University of Maryland, College Park, College Park, MD (US); and Government of the United States of America, as Represented by the Secretary of Commerce, Gaithersburg, MD (US)
Filed by University of Maryland, College Park, College Park, MD (US); and Government of the United States of America, as Represented by the Secretary of Commerce, Gaithersburg, MD (US)
Filed on May 3, 2024, as Appl. No. 18/654,208.
Application 18/654,208 is a continuation of application No. 17/743,850, filed on May 13, 2022, granted, now 12,014,247.
Claims priority of provisional application 63/188,373, filed on May 13, 2021.
Prior Publication US 2024/0296368 A1, Sep. 5, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06N 10/70 (2022.01)
CPC G06N 10/70 (2022.01) 20 Claims
OG exemplary drawing
 
1. A computer-implemented method for detecting error, the method comprising:
accessing a signal of a quantum device, the quantum device including a plurality of qubits, wherein the signal includes information about a matrix, the matrix including diagonal elements and off-diagonal elements, and wherein the off-diagonal elements of the matrix are approximately sparse;
performing randomized measurements of the off-diagonal elements of the matrix by preparing entangled Greenberger-Horne-Zeilinger states (GHZ states) on random subsets of the plurality of qubits;
recovering the matrix based on a direct measurement of the diagonal elements of the matrix; and
estimating at least one of a two-qubit correlated dephasing error or a Hamiltonian error based on the recovered matrix.