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:
Sep. 02, 2025
Filed:
Feb. 16, 2024
Google Llc, Mountain View, CA (US);
Craig Gidney, Goleta, CA (US);
Google LLC, Mountain View, CA (US);
Abstract
Methods, systems, and apparatus for encoding a magic state in a surface code patch of physical qubits with a target distance. In one aspect, a method includes performing a first surface code cycle on a surface code patch of physical qubits with an initial distance to encode the magic state into the surface code patch. Performing the first surface code cycle introduces a hook error associated with a four-body stabilizer on a qubit included in the surface code patch, where the hook error rotates a logical observable of the surface code patch. Further, performing the first surface code cycle includes initializing the qubit in the magic state. One or more rounds of error detection are performed on the surface code patch that encodes the magic state. The surface code patch is expanded to the target distance based on results of the one or more rounds of error detection.