公开(公告)号：US11581472B2

公开(公告)日：2023-02-14

申请号：US16534882

申请日：2019-08-07

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Devendra K. Sadana ,  Ning Li ,  Stephen W. Bedell ,  Sean Hart ,  Patryk Gumann

IPC: H01L39/02 ,  G06N10/00 ,  H01L39/22

Abstract: A gated Josephson junction includes a substrate and a vertical Josephson junction formed on the substrate and extending substantially normal the substrate. The vertical Josephson junction includes a first superconducting layer, a semiconducting layer, and a second superconducting layer. The first superconducting layer, the semiconducting layer, and the second superconducting layer form a stack that is substantially perpendicular to the substrate. The gated Josephson junction includes a gate dielectric layer in contact with the first superconducting layer, the semiconducting layer, and the second superconducting layer at opposing side surfaces of the vertical Josephson junction, and a gate electrically conducting layer in contact with the gate dielectric layer. The gate electrically conducting layer is separated from the vertical Josephson junction by the gate dielectric layer. In operation, a voltage applied to the gate electrically conducting layer modulates a current through the semiconducting layer of the vertical Josephson junction.

公开(公告)号：US11316022B2

公开(公告)日：2022-04-26

申请号：US16688386

申请日：2019-11-19

Applicant: International Business Machines Corporation

Inventor： Steven J. Holmes ,  Devendra K. Sadana ,  Sean Hart ,  Patryk Gumann ,  Stephen W. Bedell ,  Ning Li

IPC: H01L29/41 ,  G06N10/00 ,  B82Y10/00 ,  B82Y40/00 ,  H01L29/06 ,  H01L39/10 ,  H01L39/24

Abstract: Devices, systems, methods, computer-implemented methods, apparatus, and/or computer program products that can facilitate a suspended Majorana fermion device comprising an ion implant defined nanorod in a semiconducting device are provided. According to an embodiment, a quantum computing device can comprise a Majorana fermion device coupled to an ion implanted region. The quantum computing device can further comprise an encapsulation film coupled to the ion implanted region and a substrate layer. The encapsulation film suspends the Majorana fermion device in the quantum computing device.

公开(公告)号：US20210399044A1

公开(公告)日：2021-12-23

申请号：US16907214

申请日：2020-06-20

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Patryk Gumann ,  Andrew W. Cross ,  Sean Hart ,  Jay Michael Gambetta

IPC: H01L27/18 ,  H01L29/16 ,  H01L39/02 ,  H01L39/22 ,  H01P7/08 ,  H03K17/92 ,  G06N10/00

Abstract: A quantum system includes a qubit array comprising a plurality of qubits. A bus resonator is coupled between at least one pair of qubits in the qubit array. A switch is coupled between the at least one qubit pair of qubits.

公开(公告)号：US20210326740A1

公开(公告)日：2021-10-21

申请号：US17233089

申请日：2021-04-16

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Nicholas T. Bronn ,  Daniela F. Bogorin ,  Patryk Gumann ,  Sean Hart ,  Salvatore B. Olivadese

IPC: G06N10/00 ,  H04L1/00

Abstract: A system for transmission of quantum information for quantum error correction includes an ancilla qubit chip including a plurality of ancilla qubits, and a data qubit chip spaced apart from the ancilla qubit chip, the data qubit chip including a plurality of data qubits. The system includes an interposer coupled to the ancilla qubit chip and the data qubit chip, the interposer including a dielectric material and a plurality of superconducting structures formed in the dielectric material. The superconducting structures enable transmission of quantum information between the plurality of data qubits on the data qubit chip and the plurality of ancilla qubits on the ancilla qubit chip via virtual photons for quantum error correction.

公开(公告)号：US11107966B2

公开(公告)日：2021-08-31

申请号：US16680117

申请日：2019-11-11

Applicant: International Business Machines Corporation

Inventor： Steven J. Holmes ,  Stephen W. Bedell ,  Sean Hart ,  Devendra K. Sadana ,  Ning Li ,  Patryk Gumann

IPC: H01L39/10 ,  H01L39/24 ,  H01L27/18 ,  H01L39/22

Abstract: A quantum computing device is fabricated by forming, on a superconductor layer, a first resist pattern defining a device region and a sensing region within the device region. The superconductor layer within the sensing region is removed, exposing a region of a first surface of an underlying semiconductor layer outside the device region. The exposed region of the semiconductor layer is implanted, forming an isolation region surrounding the device region. The sensing region and a portion of the device region of the superconductor layer are exposed. A sensing region contact is formed by coupling the first surface of the semiconductor layer with a first metal layer. A nanorod contact using the first metal within the portion of the device region outside the sensing region is formed. By depositing a second metal layer on a second surface of the semiconductor layer within the sensing region, a tunnel junction gate is formed.

公开(公告)号：US10984335B2

公开(公告)日：2021-04-20

申请号：US16443603

申请日：2019-06-17

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Nicholas T. Bronn ,  Daniela F. Bogorin ,  Patryk Gumann ,  Sean Hart ,  Salvatore B. Olivadese

IPC: H03M13/00 ,  G06N10/00 ,  H04L1/00 ,  H04B10/90

Abstract: A system for transmission of quantum information for quantum error correction includes an ancilla qubit chip including a plurality of ancilla qubits, and a data qubit chip spaced apart from the ancilla qubit chip, the data qubit chip including a plurality of data qubits. The system includes an interposer coupled to the ancilla qubit chip and the data qubit chip, the interposer including a dielectric material and a plurality of superconducting structures formed in the dielectric material. The superconducting structures enable transmission of quantum information between the plurality of data qubits on the data qubit chip and the plurality of ancilla qubits on the ancilla qubit chip via virtual photons for quantum error correction.

公开(公告)号：US20210076530A1

公开(公告)日：2021-03-11

申请号：US16561920

申请日：2019-09-05

Applicant: International Business Machines Corporation

Inventor： Sean Hart ,  Daniela Florentina Bogorin ,  Nicholas Torleiv Bronn ,  Patryk Gumann ,  Salvatore Bernardo Olivadese

IPC: H05K7/20 ,  G06F1/20 ,  H01L39/04 ,  H01L39/24 ,  G06N10/00 ,  F25D3/10 ,  F25B9/12

Abstract: Devices, systems, methods, and computer-implemented methods to facilitate employing thermalizing materials in an enclosure for quantum computing devices are provided. According to an embodiment, a system can comprise a quantum computing device and an enclosure having the quantum computing device disposed within the enclosure. The system can further comprise a thermalizing material disposed within the enclosure, with the thermalizing material being adapted to thermally link a cryogenic device to the quantum computing device.

公开(公告)号：US20200321508A1

公开(公告)日：2020-10-08

申请号：US16373096

申请日：2019-04-02

Applicant: International Business Machines Corporation

Inventor： Sean Hart ,  Jay M. Gambetta ,  Patryk Gumann

IPC: H01L39/22 ,  H01L29/15 ,  H01L29/165 ,  H01L29/205 ,  H01L29/16 ,  H01L29/43 ,  H01L39/02 ,  H01L39/24

Abstract: A superconducting coupling device includes a resonator structure. The resonator structure has a first end configured to be coupled to a first device and a second end configured to be coupled to a second device. The device further includes an electron system coupled to the resonator structure, and a gate positioned proximal to a portion of the electron system. The electron system and the gate are configured to interrupt the resonator structure at one or more predetermined locations forming a switch. The gate is configured to receive a gate voltage and vary an inductance of the electron system based upon the gate voltage. The varying of the inductance induces the resonator structure to vary a strength of coupling between the first device and the second device.

公开(公告)号：US11948985B2

公开(公告)日：2024-04-02

申请号：US17659519

申请日：2022-04-18

Applicant: International Business Machines Corporation

Inventor： Steven J. Holmes ,  Devendra K. Sadana ,  Sean Hart ,  Patryk Gumann ,  Stephen W. Bedell ,  Ning Li

IPC: H01L29/41 ,  B82Y10/00 ,  B82Y40/00 ,  H01L29/06 ,  H10N60/01 ,  H10N60/84

CPC classification number: H01L29/413 ,  B82Y10/00 ,  B82Y40/00 ,  H01L29/0673 ,  H10N60/0912 ,  H10N60/84

Abstract: Devices, systems, methods, computer-implemented methods, apparatus, and/or computer program products that can facilitate a suspended Majorana fermion device comprising an ion implant defined nanorod in a semiconducting device are provided. According to an embodiment, a quantum computing device can comprise a Majorana fermion device coupled to an ion implanted region. The quantum computing device can further comprise an encapsulation film coupled to the ion implanted region and a substrate layer. The encapsulation film suspends the Majorana fermion device in the quantum computing device.

公开(公告)号：US11727295B2

公开(公告)日：2023-08-15

申请号：US16373334

申请日：2019-04-02

Applicant: International Business Machines Corporation

Inventor： Sean Hart ,  Patryk Gumann

IPC: H03K17/00 ,  G06N10/00 ,  H01P7/06 ,  H03K17/92 ,  H10N69/00

CPC classification number: G06N10/00 ,  H01P7/065 ,  H03K17/92 ,  H10N69/00

Abstract: A superconducting coupling device includes a resonator structure. The resonator structure has a first end configured to be coupled to a first device and a second end configured to be coupled to a second device. A gate is positioned proximal to a portion of the resonator structure. The gate is configured to receive a gate voltage and vary a kinetic inductance of the portion of the resonator based upon the gate voltage. The varying of the kinetic inductance induces the resonator structure to vary a strength of coupling between the first superconducting device and the second superconducting device.