公开(公告)号：US11934479B2

公开(公告)日：2024-03-19

申请号：US17065277

申请日：2020-10-07

申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

发明人： Tal Kachman ,  Mark S. Squillante ,  Lior Horesh ,  Kenneth Lee Clarkson ,  John A. Gunnels ,  Ismail Yunus Akhalwaya ,  Jayram Thathachar

IPC分类号： G06F17/14 ,  G06N10/00

CPC分类号： G06F17/141 ,  G06N10/00

摘要： A method for performing sparse quantum Fourier transform computation includes defining a set of quantum circuits, each quantum circuit comprising a Hadamard gate and a single frequency rotation operator, said set of quantum circuits being equivalent to a quantum Fourier transform circuit. The method includes constructing a subset of said quantum circuits in a quantum processor, said quantum processor having a quantum representation of a classical distribution loaded into a quantum state of said quantum processor. The method includes executing said subset of said quantum circuits on said quantum state, and performing a measurement in a frequency basis to obtain a frequency distribution corresponding to said quantum state.

公开(公告)号：US20240086749A1

公开(公告)日：2024-03-14

申请号：US18455408

申请日：2023-08-24

申请人： Amazon Technologies, Inc.

发明人： David R. Richardson ,  Marc John Brooker ,  James Michael Thompson

IPC分类号： G06N10/00 ,  G06F9/50

CPC分类号： G06N10/00 ,  G06F9/5027 ,  G06F2209/5011

摘要： Methods, systems, and computer-readable media for a service for managing quantum computing resources are disclosed. A task management service receives a description of a task specified by a client. From a pool of computing resources of a provider network, the service selects a quantum computing resource for implementation of the task. The quantum computing resource comprises a plurality of quantum bits. The service causes the quantum computing resource to run a quantum algorithm associated with the task. The service receives one or more results of the quantum algorithm from the quantum computing resource.

公开(公告)号：US11922276B2

公开(公告)日：2024-03-05

申请号：US17729999

申请日：2022-04-26

申请人： Google LLC

发明人： Rami Barends

IPC分类号： G06N10/00 ,  G01R33/035 ,  H10N60/80

CPC分类号： G06N10/00 ,  G01R33/0354 ,  H10N60/805

摘要： A device includes: a substrate; a superconducting quantum interference device (SQUID) including a superconductor trace arranged on an upper surface of the substrate and having at least one Josephson junction interrupting a path of the superconductor trace, in which the superconductor trace includes a first superconductor material that exhibits superconducting properties at or below a corresponding superconducting critical temperature; and a dielectric capping layer on an upper surface of the SQUID, in which the dielectric capping layer covers a majority of the superconductor trace of the SQUID, and the capping layer includes an opening through which a first region of the SQUID is exposed, the first region of the SQUID including a first Josephson junction.

公开(公告)号：US11922273B2

公开(公告)日：2024-03-05

申请号：US17284509

申请日：2019-10-18

申请人： Ramot at Tel-Aviv University Ltd.

发明人： Elica Kyoseva ,  Hadar Greener ,  Haim Suchowski

IPC分类号： G06N10/00 ,  G02B6/12

CPC分类号： G06N10/00 ,  G02B6/12

摘要： A method for robust state manipulation in quantum information processing comprises evanescently coupling a first waveguide to a second waveguide, the first and second waveguide having different geometries respectively; and providing waveguide geometries such that their coupling is detuned, the detuning being a function of the geometries, the detuned coupling thereby providing reliable population transfer between the first and second waveguides that is robust to fabrication and other errors. The method may be used to provide a quantum optical coupler.

公开(公告)号：US20240070497A1

公开(公告)日：2024-02-29

申请号：US18243280

申请日：2023-09-07

申请人： D-WAVE SYSTEMS INC.

发明人： Richard G. Harris

IPC分类号： G06N10/00 ,  G06F15/78 ,  G06N10/40

CPC分类号： G06N10/00 ,  G06F15/7867 ,  G06N10/40

摘要： Quantum processors having qubits with tunable capacitance are provided. The qubits include Josephson junctions shunted by capacitors and are tunably coupled to capacitance loops such that the resonant frequencies of the qubits and capacitance loops avoid entanglement with each other. Methods for tuning the capacitance of such qubits by varying the coupler's coupling strength are provided. These methods include methods for calibrating qubits' capacitance.

公开(公告)号：US11910728B2

公开(公告)日：2024-02-20

申请号：US16937330

申请日：2020-07-23

申请人： The Trustees of Princeton University

发明人： Jason Petta ,  Stefan Putz ,  Xiao Mi

IPC分类号： H01L39/22 ,  H10N60/10 ,  G06N10/00

CPC分类号： H10N60/11 ,  G06N10/00

摘要： Methods, devices, and systems are described for performing quantum operations. An example device at least one magnetic field source configured to supply an inhomogeneous magnetic field, at least one semiconducting layer, and one or more conducting layers configured to: define at least two quantum states in the at least one semiconducting layer, and cause, based on an oscillating electrical signal supplied by the one or more conducting layers, an electron to move back and forth between the at least two quantum states in the presence of the inhomogeneous magnetic field. The movement of the electron between the at least two quantum states may generate an oscillating magnetic field to drive a quantum transition between a spin-up state and spin-down state of the electron thereby implementing a qubit gate on a spin state of the electron.

公开(公告)号：US11909392B2

公开(公告)日：2024-02-20

申请号：US17296909

申请日：2019-11-27

申请人： Google LLC

发明人： Craig Gidney ,  Austin Greig Fowler

IPC分类号： H03K19/003 ,  G06N10/00 ,  G06F8/20 ,  H03M13/00 ,  H03M13/29 ,  G06F11/00 ,  H03M13/03 ,  G06F111/10

CPC分类号： H03K19/003 ,  G06F8/20 ,  G06F11/004 ,  G06N10/00 ,  H03M13/033 ,  H03M13/2909 ,  H03M13/611 ,  G06F2111/10 ,  G06F2201/82

摘要： Methods, systems, and apparatus for producing CCZ states and T states. In one aspect, a method for distilling a CCZ state includes preparing multiple target qubits, ancilla qubits and stabilizer qubits in a zero state, performing an X gate for each stabilizer qubit on multiple ancilla qubits or multiple ancilla qubits and one of the target qubits using the stabilizer qubit as a control, measuring the stabilizer qubits, performing, on each of the ancilla qubits, a Z1/4 gate and a Hadamard gate, measuring each of the ancilla qubits, performing, conditioned on each measured ancilla qubit state, a NOT operation on a selected stabilizer qubit, or a NOT operation on the selected stabilizer qubit and a Z gate on one or more respective target qubits, performing, on each target qubit and conditioned on a measured state of a respective stabilizer qubit, a Z gate on the target qubit, and performing an X gate on each of the target qubits.

公开(公告)号：US11907805B2

公开(公告)日：2024-02-20

申请号：US17495085

申请日：2021-10-06

申请人： IQM Finland Oy

发明人： Caspar Ockeloen-Korppi ,  Tianyi Li ,  Wei Liu ,  Vasilii Sevriuk ,  Tiina Naaranoja ,  Mate Jenei ,  Jan Goetz ,  Kuan Yen Tan ,  Mikko Möttönen ,  Kok Wai Chan

IPC分类号： G06N10/00 ,  H10N60/12 ,  H10N60/80 ,  H10N60/01 ,  H10N69/00

CPC分类号： G06N10/00 ,  H10N60/0912 ,  H10N60/12 ,  H10N60/805 ,  H10N69/00

摘要： A three-dimensional superconducting qubit and a method for manufacturing the same are disclosed. In an example, a three-dimensional superconducting qubit comprises a structural base comprising one or more insulating materials, and superconductive patterns on surfaces of the structural base. The superconductive patterns form at least a capacitive part and an inductive part of the three-dimensional superconducting qubit. A first surface of the surfaces of the structural base defines a first plane and a second surface of the surfaces of the structural base defines a second plane, the second plane being oriented differently than the first plane. At least one superconductive pattern of the superconductive patterns extends from the first surface to the second surface.

公开(公告)号：US11907804B2

公开(公告)日：2024-02-20

申请号：US17140848

申请日：2021-01-04

申请人： AT&T Intellectual Property I, L.P.

发明人： Moshiur Rahman

IPC分类号： G06N10/00 ,  G06F8/41 ,  B82Y20/00 ,  H04B10/70 ,  G01C19/72 ,  B82Y10/00 ,  G02F1/35

CPC分类号： G06N10/00 ,  B82Y10/00 ,  B82Y20/00 ,  G01C19/72 ,  G01C19/721 ,  G02F1/3519 ,  G06F8/41 ,  H04B10/70

摘要： Aspects of the subject disclosure may include, for example, obtaining instructions for implementing a quantum algorithm adapted to obtain a computational result according to a quantum mechanical process. A sequence of quantum operations is generated according to the instructions for implementing the quantum algorithm, wherein the sequence of quantum operations is adapted to physically manipulate a plurality of quantum bits according to the quantum mechanical process. The sequence of quantum operations is provided to a geographically separated quantum central module, via a communication channel, the geographically separated quantum central module implements the quantum mechanical process to obtain a computational result. The computational result is received from the geographically separated quantum central module via the communication channel. Other embodiments are disclosed.

公开(公告)号：US11903329B2

公开(公告)日：2024-02-13

申请号：US17836893

申请日：2022-06-09

申请人： Google LLC

发明人： Brian James Burkett

IPC分类号： H10N60/01 ,  G06N10/00 ,  B82Y10/00

CPC分类号： H10N60/0912 ,  B82Y10/00 ,  G06N10/00

摘要： A method of reducing junction resistance variation for junctions in quantum information processing devices fabricated using two-step deposition processes. In one aspect, a method includes providing a dielectric substrate, forming a first resist layer on the dielectric substrate, forming a second resist layer on the first resist layer, and forming a third resist layer on the second resist layer. The first resist layer includes a first opening extending through a thickness of the first resist layer, the second resist layer includes a second opening aligned over the first opening and extending through a thickness of the second resist layer, and the third resist layer includes a third opening aligned over the second opening and extending through a thickness of the third resist layer.