公开(公告)号：US20190042963A1

公开(公告)日：2019-02-07

申请号：US15813441

申请日：2017-11-15

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： David W. ABRAHAM ,  Josephine B. CHANG ,  Jay M. GAMBETTA

IPC: G06N99/00 ,  H03K19/195 ,  H01L27/18 ,  G11C11/44 ,  G11C16/02 ,  H01L39/22

Abstract: A technique relates to a superconducting qubit. A Josephson junction includes a first superconductor and a second superconductor formed on a non-superconducting metal. A capacitor is coupled in parallel with the Josephson junction.

公开(公告)号：US20180287040A1

公开(公告)日：2018-10-04

申请号：US15945296

申请日：2018-04-04

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Oliver DIAL ,  Jay M. GAMBETTA ,  Douglas T. McClure, III ,  Matthias STEFFEN

IPC: H01L39/24 ,  H01L39/14 ,  B82Y10/00 ,  G06N99/00

CPC classification number: H01L39/24 ,  B82Y10/00 ,  G06N99/002 ,  H01L39/14 ,  H05K999/99

Abstract: A technique relates a superconducting microwave cavity. An array of posts has different heights in the cavity, and the array supports a localized microwave mode. The array of posts includes lower resonant frequency posts and higher resonant frequency posts. The higher resonant frequency posts are arranged around the lower resonant frequency posts. A first plate is opposite a second plate in the cavity. One end of the lower resonant frequency posts is positioned on the second plate so as to be electrically connected to the second plate. Another end of the lower resonant frequency posts in the array is open so as not to form an electrical connection to the first plate. Qubits are connected to the lower resonant frequency posts in the array of posts, such that each of the qubits is physically connected to one or two of the lower resonant frequency posts in the array of posts.

公开(公告)号：US20190165242A1

公开(公告)日：2019-05-30

申请号：US15827718

申请日：2017-11-30

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Markus BRINK ,  Antonio CORCOLES-GONZALEZ ,  Jay M. GAMBETTA ,  Sami ROSENBLATT ,  Firat SOLGUN

IPC: H01L39/22 ,  G06N99/00 ,  H01P3/08 ,  H01L39/24

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：US20180137430A1

公开(公告)日：2018-05-17

申请号：US15871443

申请日：2018-01-15

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Jerry M. CHOW ,  Jay M. GAMBETTA ,  Mary B. ROTHWELL ,  James R. ROZEN

IPC: G06N99/00 ,  H01L25/04 ,  H01L39/24 ,  H01L39/22 ,  H01L39/04

CPC classification number: G06N99/002 ,  H01L25/04 ,  H01L27/18 ,  H01L39/045 ,  H01L39/223 ,  H01L39/2493

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：US20230142419A1

公开(公告)日：2023-05-11

申请号：US18096108

申请日：2023-01-12

Applicant: International Business Machines Corporation

Inventor： Shaohan Hu ,  Rudy Raymond HARRY PUTRA ,  Stephen WOOD ,  Marco PISTOLA ,  Jay M. GAMBETTA

IPC: G06F8/41 ,  G06N10/20 ,  G06N10/40

CPC classification number: G06F8/41 ,  G06N10/20 ,  G06N10/40

Abstract: In an embodiment, a method includes measuring a first number of control qubits in a quantum algorithm, wherein a quantum circuit representation of the quantum algorithm includes a multiple-controlled-NOT gate. In an embodiment, a method includes measuring a second number of ancilla qubits in a quantum computer. In an embodiment, a method includes comparing the first number and the second number to determine an optimum compilation method for a quantum circuit. In an embodiment, a method includes compiling, in response to the comparison determining the second number is greater than one and less than the difference of the first number and 2, a quantum circuit from the quantum algorithm using a hybrid method.

公开(公告)号：US20200028065A1

公开(公告)日：2020-01-23

申请号：US16114797

申请日：2018-08-28

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Oliver DIAL ,  Jay M. GAMBETTA ,  Douglas T. McClure, III ,  Matthias STEFFEN

IPC: H01L39/24 ,  G06N10/00 ,  H01P7/00 ,  H01P1/205 ,  H01L39/14 ,  H01L39/02

Abstract: A technique relates a superconducting microwave cavity. An array of posts has different heights in the cavity, and the array supports a localized microwave mode. The array of posts includes lower resonant frequency posts and higher resonant frequency posts. The higher resonant frequency posts are arranged around the lower resonant frequency posts. A first plate is opposite a second plate in the cavity. One end of the lower resonant frequency posts is positioned on the second plate so as to be electrically connected to the second plate. Another end of the lower resonant frequency posts in the array is open so as not to form an electrical connection to the first plate. Qubits are connected to the lower resonant frequency posts in the array of posts, such that each of the qubits is physically connected to one or two of the lower resonant frequency posts in the array of posts.

公开(公告)号：US20180137429A1

公开(公告)日：2018-05-17

申请号：US15871436

申请日：2018-01-15

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Jerry M. CHOW ,  Jay M. GAMBETTA ,  Mary B. ROTHWELL ,  James R. ROZEN

IPC: G06N99/00 ,  H01L25/04 ,  H01L39/24 ,  H01L39/22 ,  H01L39/04

CPC classification number: G06N99/002 ,  H01L25/04 ,  H01L27/18 ,  H01L39/045 ,  H01L39/223 ,  H01L39/2493

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：US20180287039A1

公开(公告)日：2018-10-04

申请号：US15945281

申请日：2018-04-04

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Oliver DIAL ,  Jay M. GAMBETTA ,  Douglas T. McClure, III ,  Matthias STEFFEN

IPC: H01L39/24 ,  H01L39/14 ,  B82Y10/00 ,  G06N99/00

Abstract: A technique relates a superconducting microwave cavity. An array of posts has different heights in the cavity, and the array supports a localized microwave mode. The array of posts includes lower resonant frequency posts and higher resonant frequency posts. The higher resonant frequency posts are arranged around the lower resonant frequency posts. A first plate is opposite a second plate in the cavity. One end of the lower resonant frequency posts is positioned on the second plate so as to be electrically connected to the second plate. Another end of the lower resonant frequency posts in the array is open so as not to form an electrical connection to the first plate. Qubits are connected to the lower resonant frequency posts in the array of posts, such that each of the qubits is physically connected to one or two of the lower resonant frequency posts in the array of posts.

公开(公告)号：US20180285761A1

公开(公告)日：2018-10-04

申请号：US15896651

申请日：2018-02-14

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Jay M. GAMBETTA ,  Easwar MAGESAN

IPC: G06N99/00 ,  H03K19/003 ,  H03M13/15 ,  H03M13/01 ,  H03M13/00

CPC classification number: G06N99/002 ,  G06N99/00 ,  H03K19/00346 ,  H03M13/005 ,  H03M13/01 ,  H03M13/154 ,  H03M13/1575

Abstract: A technique relates to quantum error correction. Code qubits are configured as target qubits, and the code qubits have a first dephasing time and a first anharmonicity. Syndrome qubits are configured as control qubits, and the syndrome qubits have a second dephasing time and a second anharmonicity. The target qubits and the control qubits are configured to form one or more controlled not (CNOT) gates. The first dephasing time is greater than the second dephasing time and the second anharmonicity is greater than the first anharmonicity.

公开(公告)号：US20180232655A1

公开(公告)日：2018-08-16

申请号：US15946744

申请日：2018-04-06

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Jerry M. CHOW ,  Jay M. GAMBETTA ,  Mary B. ROTHWELL ,  James R. ROZEN

IPC: G06N99/00 ,  H01L39/24 ,  H01L39/22 ,  H01L25/04 ,  H01L27/18 ,  H01L39/04

CPC classification number: G06N99/002 ,  H01L25/04 ,  H01L27/18 ,  H01L39/045 ,  H01L39/223 ,  H01L39/2493

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.