The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2023
Filed:
Jun. 29, 2021
Preparation of qunaught states for a surface gkp code using a three (or higher) level ancilla system
Amazon Technologies, Inc., Seattle, WA (US);
Kyungjoo Noh, Pasadena, CA (US);
Christopher Chamberland, Pasadena, CA (US);
Fernando Brandao, Pasadena, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
A fault tolerant quantum error correction protocol is implemented for a surface code comprising Gottesman Kitaev Preskill (GKP) qubits. Analog information is determined when measuring position or momentum shifts, wherein the analog information indicates a closeness of the shift to a decision boundary. The analog information is further used to determine confidence values for error corrected measurements from the GKP qubits of the surface code. These confidence values are used to dynamically determine edge weights in a matching graph used to decode syndrome measurements of the surface code, wherein the confidence values are obtained using a maximum-likelihood decoding protocol for two-qubit gates. Also, a three-level ancilla is used to more reliably squeeze the GKP qunaught states.