公开(公告)号：GB2628721A8

公开(公告)日：2025-04-09

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：GB2582527B

公开(公告)日：2021-01-20

申请号：GB202009577

申请日：2017-12-20

Applicant: IBM

Inventor： JAY GAMBETTA ,  ANTONIO CORCOLES-GONZALEZ ,  FIRAT SOLGUN ,  SAMI ROSENBLATT ,  MARKUS BRINK

IPC: G06N10/00 ,  H01L27/18 ,  H01L39/22 ,  H01L39/24 ,  H01P1/203 ,  H01P7/08

Abstract: A technique relates to a structure. A first surface includes an inductive element of a resonator. A second surface includes a first portion of a capacitive element of the resonator and at least one qubit. A second portion of the capacitive element of the resonator is on the first surface.

公开(公告)号：GB2582515A

公开(公告)日：2020-09-23

申请号：GB202008794

申请日：2018-11-26

Applicant: IBM

Inventor： JAY GAMBETTA ,  ANTONIO MEZZACAPO ,  RAMIS MOVASSAGH ,  PAUL KRISTAN TEMME

IPC: G06N10/00 ,  G06N5/00

Abstract: Techniques for performing cost function deformation in quantum approximate optimization are provided. The techniques include mapping a cost function associated with a combinatorial optimization problem to an optimization problem over allowed quantum states. A quantum Hamiltonian is constructed for the cost function, and a set of trial states are generated by a physical time evolution of the quantum hardware interspersed with control pulses. Aspects include measuring a quantum cost function for the trial states, determining a trial state resulting in optimal values, and deforming a Hamiltonian to find an optimal state and using the optimal state as a next starting state for a next optimization on a deformed Hamiltonian until an optimizer is determined with respect to a desired Hamiltonian.

公开(公告)号：GB2582085A

公开(公告)日：2020-09-09

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.

公开(公告)号：GB2581089A

公开(公告)日：2020-08-05

申请号：GB202006037

申请日：2017-12-06

Applicant: IBM

Inventor： ANDREW CROSS ,  LEV SAMUEL BISHOP ,  ISMAEL FARO SERTAGE ,  JAY GAMBETTA

IPC: G06N10/00 ,  G06F9/50

Abstract: A compatibility is ascertained between a configuration of a quantum processor (q-processor) of a quantum cloud compute node (QCCN) in a quantum cloud environment (QCE) and an operation requested in a first instruction in a portion (q-portion) of a job submitted to the QCE, the QCE including the QCCN and a conventional compute node (CCN), the CCN including a conventional processor configured for binary computations. In response to the ascertaining, a quantum instruction (q-instruction) is constructed corresponding to the first instruction. The q- instruction is executed using the q-processor of the QCCN to produce a quantum output signal (q-signal). The q-signal is transformed into a corresponding quantum computing result (q- result). A final result is returned to a submitting system that submitted the job, wherein the final result comprises the q-result.

公开(公告)号：GB2562979B

公开(公告)日：2019-04-17

申请号：GB201814344

申请日：2017-01-13

Applicant: IBM

Inventor： HANHEE PAIK ,  STEFAN FILIPP ,  LEV SAMUEL BISHOP ,  JAY GAMBETTA ,  JASON SCOTT ORCUTT

IPC: H01L39/02 ,  B82Y10/00 ,  B82Y20/00 ,  G02B6/293 ,  G02F1/01 ,  G02F1/03 ,  G06N10/00 ,  H01L27/18 ,  H01P7/06 ,  H01P7/08 ,  H01S3/08

Abstract: Transducers and methods of making the same include a substrate having a cavity with a diameter that supports whispering gallery modes at a frequency of an input signal. A focusing structure in the cavity focuses the electric field of the input signal. A resonator directly under the focusing structure has a crystalline structure that generates an electro-optic effect when exposed to electrical fields. An electric field of the input signal modulates an output signal in the resonator via the electro-optic effect.

公开(公告)号：GB2567080A

公开(公告)日：2019-04-03

申请号：GB201900518

申请日：2017-06-20

Applicant: IBM

Inventor： HANHEE PAIK ,  JASON SCOTT ORCUTT ,  LEV SAMUEL BISHOP ,  JAY GAMBETTA ,  JAMES ROZEN

IPC: G06N10/00

Abstract: Techniques relate to reading a qubit coupled to a microwave resonator.A microwave signal at a microwave resonator frequency is input to the microwave resonator that couples to the qubit. A microwave readout signal from the microwave resonator is output to a microwave to optical converter. The microwave readout signal includes a qubit state of the qubit. The microwave to optical converter is configured to convert the microwave readout signal to an optical signal. In response to the optical signal being output by the microwave to optical converter, it is determined that the qubit is in a predefined qubit state. In response to no optical signal being output by the microwave to optical converter, it is determined that the qubit is not in the predefined qubit state.

公开(公告)号：GB2557828B

公开(公告)日：2018-11-21

申请号：GB201805766

申请日：2016-07-12

Applicant: IBM

Inventor： BALEEGH ABDO ,  JAY GAMBETTA ,  JERRY MOY CHOW ,  HANHEE PAIK

IPC: H01L39/22 ,  B82Y10/00 ,  G06N99/00

Abstract: A technique relates to a microwave device. A qubit is connected to a first end of a first coupling capacitor and a first end of a second coupling capacitor. A resonator is connected to a second end of the first coupling capacitor and a second end of the second coupling capacitor. The resonator includes a fundamental resonance mode. A filter is connected to both the qubit and the first end of the first or second coupling capacitor.

公开(公告)号：GB2528196B

公开(公告)日：2018-03-21

申请号：GB201516760

申请日：2014-01-21

Applicant: IBM

Inventor： JERRY CHOW ,  JAY GAMBETTA ,  SETH MERKEL ,  CHAD TYLER RIGETTI ,  MATTHIAS STEFFEN

IPC: H01L49/02 ,  G06N99/00 ,  H03K19/195

Abstract: A device includes a housing, at least two qubits disposed in the housing and a resonator disposed in the housing and coupled to the at least two qubits, wherein the at least two qubits are maintained at a fixed frequency and are statically coupled to one another via the resonator, wherein energy levels |03> and |12> are closely aligned, wherein a tuned microwave signal applied to the qubit activates a two-qubit phase interaction.