公开(公告)号：US12182665B2

公开(公告)日：2024-12-31

申请号：US17928349

申请日：2021-05-27

Applicant: Google LLC

Inventor： Yuezhen Niu ,  Trevor Johnathan McCourt ,  Masoud Mohseni ,  Vadim Smelyanskiy

IPC: G06N10/70 ,  G06N10/40 ,  G06N10/20

Abstract: Errors that affect a quantum computer can be efficiently measured and characterized by placing the quantum computer in a highly-entangled state such as a Greenberger-Horne-Zeilinger (GHZ) state, accumulating quantum errors in the highly entangled state, and then measuring the accumulated errors. In some approaches, the error characterization includes measuring parity oscillations of the GHZ state and fitting a quantum error model to a power spectrum of the parity oscillations. The fitted quantum error model can be used to select a suitable fault-tolerant error correction scheme for the quantum computer given its environmental noise.