公开(公告)号：GB2628721B

公开(公告)日：2025-05-07

申请号：GB202407066

申请日：2022-08-23

Applicant: IBM

Inventor： ABHINAV KANDALA ,  DAVID MCKAY ,  SRIKANTH SRINIVASAN ,  EASWAR MAGESAN ,  JAY GAMBETTA

IPC: G06N10/70

Abstract: Systems and techniques that facilitate Stark shift cancellation are provided. In various embodiments, a system can comprise a control qubit that is coupled to a target qubit. In various cases, the control qubit can be driven by a first tone that entangles the control qubit with the target qubit. In various aspects, the control qubit can be further driven by a second tone simultaneously with the first tone. In various cases, the second tone can have an opposite detuning sign than the first tone. In various instances, the first tone can cause a Stark shift in an operational frequency of the control qubit, and the second tone can cancel the Stark shift.

公开(公告)号：GB2573961B

公开(公告)日：2022-01-12

申请号：GB201912328

申请日：2017-12-05

Applicant: IBM

Inventor： LEV SAMUEL BISHOP ,  JAY GAMBETTA ,  HANHEE PAIK

IPC: G06N10/00 ,  H04B10/70

Abstract: A technique relates to communication of a quantum state. Polarization hardware is configured to receive a polarization encoded qubit and split the polarization encoded qubit into two qubits. A converter is coupled to the polarization hardware, and the converter is configured to convert the two qubits into a form suitable for a CNOT gate. The CNOT gate is configured to receive the two qubits such that a measurement result of a CNOT operation of the CNOT gate determines success of the communication of the quantum state.

公开(公告)号：GB2574552A

公开(公告)日：2019-12-11

申请号：GB201913518

申请日：2017-11-24

Applicant: IBM

Inventor： BALEEGH ABDO ,  JARED BARNEY HERTZBERG ,  EASWAR MAGESAN ,  JAY GAMBETTA

IPC: H01L29/06

Abstract: A technique relates to a superconducting quantum device. A fixed frequency transmon qubit (110A) is provided. A tunable frequency transmon qubit (110B) is provided. The fixed frequency transmon qubit (110A) is coupled to the tunable frequency transmon qubit (110B) to form a single qubit (100).

公开(公告)号：GB2573961A

公开(公告)日：2019-11-20

申请号：GB201912328

申请日：2017-12-05

Applicant: IBM

Inventor： LEV SAMUEL BISHOP ,  JAY GAMBETTA ,  HANHEE PAIK

IPC: G06F1/00

Abstract: A technique relates to communication of a quantum state. Polarization hardware is configured to receive a polarization encoded qubit and split the polarization encoded qubit into two qubits. Aconverter is coupled to the polarization hardware, and the converter is configured to convert the two qubits into a form suitable for a CNOT gate. The CNOT gate is configured to receive the two qubits such that a measurement result of a CNOT operation of the CNOT gate determines success of the communication of the quantum state.

公开(公告)号：GB2554627B

公开(公告)日：2018-08-22

申请号：GB201800083

申请日：2016-06-08

Applicant: IBM

Inventor： JERRY MOY CHOW ,  JAY GAMBETTA ,  MARY BETH ROTHWELL ,  JAMES ROZEN

IPC: G06N99/00 ,  H01L25/04 ,  H01L39/04

Abstract: A technique relates to an assembly for a quantum computing device. A quantum bus plane includes a first set of recesses. A readout plane includes a second set of recesses. A block is positioned to hold the readout plane opposite the quantum bus plane, such that the first set of recesses opposes the second set of recesses. A plurality of qubit chips are included where each has a first end positioned in the first set of recesses and has a second end positioned in the second set of recesses.

公开(公告)号：GB2628721A

公开(公告)日：2024-10-02

申请号：GB202407066

申请日：2022-08-23

Applicant: IBM

Inventor： ABHINAV KANDALA ,  DAVID MCKAY ,  SHRIKANTH SRINIVASEN ,  EASWAR MAGESAN ,  JAY GAMBETTA

IPC: G06N10/70

Abstract: Systems and techniques that facilitate Stark shift cancellation are provided. In various embodiments, a system can comprise a control qubit that is coupled to a target qubit. In various cases, the control qubit can be driven by a first tone that entangles the control qubit with the target qubit. In various aspects, the control qubit can be further driven by a second tone simultaneously with the first tone. In various cases, the second tone can have an opposite detuning sign than the first tone. In various instances, the first tone can cause a Stark shift in an operational frequency of the control qubit, and the second tone can cancel the Stark shift.

公开(公告)号：GB2574552B

公开(公告)日：2022-02-16

申请号：GB201913518

申请日：2017-11-24

Applicant: IBM

Inventor： BALEEGH ABDO ,  JARED BARNEY HERTZBERG ,  EASWAR MAGESAN ,  JAY GAMBETTA

IPC: H01L39/22 ,  B82Y10/00 ,  G06N10/00

Abstract: A technique relates to providing a superconducting quantum device. A fixed frequency transmon qubit is provided. A tunable frequency transmon qubit is provided. The fixed frequency transmon qubit is coupled to the tunable frequency transmon qubit to form a single qubit.

公开(公告)号：GB2581942A

公开(公告)日：2020-09-02

申请号：GB202009136

申请日：2017-12-21

Applicant: IBM

Inventor： JAY GAMBETTA ,  VOJTECH HAVLICEK ,  PAUL KRISTAN TEMME

IPC: G06N10/00 ,  G06N3/08 ,  G06N20/00

Abstract: A system comprises quantum hardware, a memory that stores computer-executable components and a processor that executes computer-executable components stored in the memory. The computer-executable components comprise a calibration component that calibrates quantum hardware to generate a short depth quantum circuit. The computer-executable components further comprise a cost function component that determines a cost function for the short depth quantum circuit based on an initial value for a parameter of a machine-learning classifier. The computer-executable components further comprise a training component that modifies the initial value for the parameter during training to a second value for the parameter based on the cost function for the short depth quantum circuit.

公开(公告)号：GB2566885A

公开(公告)日：2019-03-27

申请号：GB201901049

申请日：2017-08-03

Applicant: IBM

Inventor： PAUL KRISTAN TEMME ,  SERGEY BRAVYI ,  JAY GAMBETTA ,  ANTONIO MEZZACAPO

IPC: G06N99/00

Abstract: A technique relates to reducing qubits required on a quantum computer. A Fermionic system is characterized in terms of a Hamiltonian. The Fermionic system includes Fermions and Fermionic modes with a total number of 2M Fermionic modes. The Hamiltonian has a parity symmetry encoded by spin up and spin down parity operators (1005). Fermionic modes are sorted such that the first half to 2M modes corresponds to spin up and the second half of 2M modes corresponds to spin down (1010). The Hamiltonian and the parity operators are transformed utilizing a Fermion to qubit mapping that transforms parity operators to a first single qubit Pauli operator on a qubit M and a second single qubit Pauli operator on a qubit 2M (1015). The qubit M having been operated on by the first single qubit Pauli operator and the qubit 2M having been operated on by the second single qubit Pauli operator are removed (1020).

公开(公告)号：GB2582085B

公开(公告)日：2022-05-11

申请号：GB202007413

申请日：2017-12-21

Applicant: IBM

Inventor： MARTIN SANDBERG ,  DAVID MCKAY ,  PATRYK GUMANN ,  HANHEE PAIK ,  JAY GAMBETTA

IPC: G06N99/00 ,  H01L23/485

Abstract: Embodiments of the present invention disclose a computer system having a plurality of quantum circuits arranged in a two-dimensional plane-like structure, the quantum circuits comprising qubits and busses (i.e., qubit-qubit interconnects), and a method of formation therefor. A quantum computer system comprises a plurality of quantum circuits arranged in a two-dimensional pattern. At least one interior quantum circuit, not along the perimeter of the two-dimensional plane of the plurality of quantum circuits, contains a bottom chip, a device layer, a top chip, and a routing layer. A signal wire connects the device layer to the routing layer, wherein the signal wire breaks the two dimensional plane, for example, the signal wire extends into a different plane.