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.:

US 12204990 B1

Date of Patent:

Jan. 21, 2025

Filed:

Nov. 01, 2023

Error corrected variational algorithms

Applicant:

Google Llc, Mountain View, CA (US);

Inventors:

Ryan Babbush, Venice, CA (US);

Austin Greig Fowler, Reseda, CA (US);

Assignee:

Google LLC, Mountain View, CA (US);

Attorney:

Fish & Richardson P.C.

Primary Examiner:

Phallaka Kik

Int. Cl.

CPC ...

G06N 10/00 (2022.01); G06F 15/16 (2006.01); G06F 30/20 (2020.01); G06F 30/337 (2020.01); G06F 30/373 (2020.01); G06F 30/398 (2020.01); G06N 10/20 (2022.01); G06N 10/40 (2022.01);

U.S. Cl.

CPC ...

G06N 10/00 (2019.01); G06F 15/16 (2013.01); G06F 30/20 (2020.01); G06F 30/337 (2020.01); G06F 30/373 (2020.01); G06F 30/398 (2020.01); G06N 10/20 (2022.01); G06N 10/40 (2022.01);

Abstract

Methods, systems and apparatus for approximating a target quantum state that is defined as a result of applying a specific rotation operation to an initial quantum state. A method includes determining multiple configurations of T-gates. Each configuration of T-gates includes a number of T-gates that is less than or equal to a predefined total number of T-gates and represents a rotation operation that, when applied to the initial quantum state, produces an evolved quantum state that is an approximation of the target quantum state. A configuration of T-gates that represents a rotation operation with a rotation angle that is closest to a rotation angle of the specific rotation operation is selected from the multiple configurations of T-gates. A rotation operation represented by the selected configuration of T-gates is applied to the initial quantum state to obtain the approximation of the target quantum state.

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