公开(公告)号：US10558932B1

公开(公告)日：2020-02-11

申请号：US14694762

申请日：2015-04-23

Applicant: Google Inc.

Inventor： Hartmut Neven ,  Nan Ding ,  Vasil S. Denchev

IPC: G06F17/30 ,  G06Q10/06 ,  G06F9/46 ,  H04L29/06 ,  G06F15/16 ,  G06N20/00 ,  G06F17/16 ,  G06N10/00

Abstract: A system comprises a network of computers comprising a master computer and slave computers. For a machine learning problem that is partitioned into a number of correlated sub-problems, each master computer is configured to store tasks associated with the machine learning problem, and each of the slave computers is assigned one of the correlated sub-problems. Each slave computer is configured to store variables or parameters or both associated with the assigned one of the correlated sub-problems; obtain information about one or more tasks stored by the master computer without causing conflict with other slave computers with regard to the information; perform computations to update the obtained information and the variables or parameters or both of the assigned sub-problem; send the updated information to the master computer to update the information stored at the master computer; and store the updated variables or parameters or both of the assigned sub-problem.

公开(公告)号：US20190156239A1

公开(公告)日：2019-05-23

申请号：US16301863

申请日：2016-05-17

Applicant: GOOGLE INC.

Inventor： John Martinis ,  Nan Ding ,  Ryan Babbush ,  Sergei V. Isakov ,  Hartmut Neven ,  Vadim Smelyanskiy ,  Sergio Boixo Castrillo

IPC: G06N10/00

Abstract: Methods and apparatus for estimating the fidelity of quantum hardware. In one aspect, a method includes accessing a set of quantum gates; sampling a subset of quantum gates from the set of quantum gates, wherein the subset of quantum gates defines a quantum circuit; applying the quantum circuit to a quantum system and performing measurements on the quantum system to determine output information of the quantum system; calculating output information of the quantum system based on application of the quantum circuit to the quantum system; and estimating a fidelity of the quantum circuit based on the determined output information and the calculated output information of the quantum system.