公开(公告)号：US12191051B2

公开(公告)日：2025-01-07

申请号：US18329743

申请日：2023-06-06

Applicant: International Business Machines Corporation

Inventor： Timothy Phung ,  Moein Malekakhlagh ,  Jason S. Orcutt

IPC: G06N10/40 ,  H01B12/02

Abstract: Systems and techniques that facilitate enabling transfer of a quantum state between a quantum device and a microwave resonator of a microwave optical transducer. In various embodiments, a system can comprise a quantum device, a microwave optical transducer including a microwave resonator, and a coherent interconnect. In various embodiments, the coherent interconnect can be between the quantum device and the microwave optical transducer that can enable bi-directional transfer of a quantum state between the quantum device and the microwave resonator. In various embodiments, the microwave optical transducer can be separately packaged from the quantum device. With various embodiments, the coherent interconnect can be a superconducting coaxial cable.

公开(公告)号：US20240070506A1

公开(公告)日：2024-02-29

申请号：US17822499

申请日：2022-08-26

Applicant: International Business Machines Corporation

Inventor： Devin Underwood ,  Timothy Phung ,  Muir Kumph

IPC: G06N10/40

CPC classification number: G06N10/40

Abstract: One or more systems, devices, and/or methods of use provided herein relate to signal filters for scalable quantum computing architectures. According to one embodiment, a device can comprise a circuit board comprising a plurality of layers, wherein various ones of the plurality of layers comprises a different absorptive material, and a plurality of signal lines that pass through the circuit board, wherein a first layer of the circuit board is comprised of a first material that filters a first signal line that traverses through at least the first layer of the plurality of layers.

公开(公告)号：US20230198555A1

公开(公告)日：2023-06-22

申请号：US17552580

申请日：2021-12-16

Applicant: International Business Machines Corporation

Inventor： Timothy Phung ,  Devin Underwood ,  Jiri Stehlik ,  David Zajac

IPC: H04B1/00 ,  G06N10/40

CPC classification number: H04B1/0096 ,  H04B1/0028 ,  G06N10/40

Abstract: Systems and techniques that facilitate mitigation of baseband pulse distortion via radiofrequency-to-baseband conversion are provided. In various embodiments, a system can comprise a qubit. In various aspects, the system can further comprise a signal generator that can produce a radiofrequency signal. In various instances, the system can further comprise a signal converter coupled between the qubit and the signal generator. In various cases, the signal converter can convert the radiofrequency signal into a baseband signal. In various aspects, such radiofrequency-to-baseband conversion can reduce a dispersion-induced distortion associated with driving the qubit.

公开(公告)号：US20220293845A1

公开(公告)日：2022-09-15

申请号：US17200487

申请日：2021-03-12

Applicant: International Business Machines Corporation

Inventor： Timothy Phung ,  Charles Thomas Rettner ,  Harry Jonathon Mamin ,  Vivekananda P. Adiga ,  Russell A. Budd

IPC: H01L39/22 ,  H01L27/18 ,  H01L49/02 ,  H01L39/24

Abstract: Systems and techniques that facilitate trimmable inductors for qubit frequency tuning are provided. In various embodiments, a device can comprise a Josephson junction. In various aspects, the Josephson junction can be shunted by a capacitor, and a trimmable inductor can couple the Josephson junction to a pad of the capacitor. In various cases, the trimmable inductor can comprise a first conductive path that includes a severable and/or weldable superconducting bridge and a second conductive path that is in parallel with the first conductive path. In various aspects, severing and/or welding the severable and/or weldable superconducting bridge can controllably change an inductance of the trimmable inductor, which can commensurately change a resonant frequency of a qubit formed by the Josephson junction and the capacitor.

公开(公告)号：US20220094358A1

公开(公告)日：2022-03-24

申请号：US17031369

申请日：2020-09-24

Applicant: International Business Machines Corporation

Inventor： Timothy Phung

IPC: H03K17/92 ,  H01L27/18 ,  G06N10/00 ,  G06F30/394

Abstract: Techniques for designing, creating, and utilizing a current biased tunable qubit are presented. A qubit device can comprise a first Josephson junction (JJ) located along a first current path of the device, and a second JJ and third JJ coupled in series along a second current path in parallel with the first current path, wherein the second and third JJs facilitate controlling frequency of the device. The first JJ can be larger in area than each of the second and third JJs, wherein a current splitting ratio between the first current path and second current path can be increased thereby. The device can comprise a capacitor with a first terminal associated with the second and third JJs, and a second terminal associated with ground. Alternatively, a high kinetic inductance wire can be used in the first current path, instead of the JJ.

公开(公告)号：US20160056368A1

公开(公告)日：2016-02-25

申请号：US14466904

申请日：2014-08-22

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： STUART P. PARKIN ,  Timothy Phung ,  Aakash Pushp

IPC: H01L43/02 ,  H01L43/10 ,  H01L43/12 ,  H01L43/08

CPC classification number: G11C19/0808 ,  G11C11/161 ,  G11C11/1675 ,  G11C19/0841 ,  G11C19/0875

Abstract: A domain wall injector device uses electrical current passed across an interface between two magnetic regions whose magnetizations are aligned non-collinearly to create a domain wall or a series of domain walls in one of the magnetic regions. The method relies on a combination of innate fringing fields from the magnetic regions and the spin-transfer torque derived from the charge current. The device may be used to store data that are subsequently read out.

Abstract translation: 畴壁注射器装置使用通过两个磁性区域之间的界面的电流，其磁化非对称排列以在一个磁性区域中产生畴壁或一系列畴壁。 该方法依赖于来自磁性区域的固有边缘场和从充电电流导出的自旋传递扭矩的组合。 该设备可用于存储随后读出的数据。

公开(公告)号：US12015397B2

公开(公告)日：2024-06-18

申请号：US17820721

申请日：2022-08-18

Applicant: International Business Machines Corporation

Inventor： Timothy Phung

IPC: H03K17/92 ,  G06N10/40 ,  H10N60/12 ,  H10N69/00

CPC classification number: H03K17/92 ,  G06N10/40 ,  H10N60/12 ,  H10N69/00

Abstract: One or more systems, devices, and/or methods of manufacture and/or use provided herein relate to a quantum computing process to achieve higher connectivity of qubits to more than nearest neighbors and/or to a plurality of nearest neighbors. A system can comprise a tunable first coupler coupled to a first qubit, a tunable second coupler coupled to a second qubit, and a junction coupling the first coupler and the second coupler being both parametrically drivable. The first coupler and the second coupler can comprise superconducting quantum interference devices or Josephson junctions. The junction can comprise a central hub or central node separately coupled to the first coupler and the second coupler. The first coupler and the second coupler can be configured to capacitively or inductively couple the first qubit and the second qubit to one another to perform a control-Z (CZ) gate or an iSWAP gate.

公开(公告)号：US20240063791A1

公开(公告)日：2024-02-22

申请号：US17820721

申请日：2022-08-18

Applicant: International Business Machines Corporation

Inventor： Timothy Phung

IPC: H03K17/92 ,  G06N10/40 ,  H01L39/22 ,  H01L27/18

CPC classification number: H03K17/92 ,  G06N10/40 ,  H01L39/223 ,  H01L27/18

Abstract: One or more systems, devices, and/or methods of manufacture and/or use provided herein relate to a quantum computing process to achieve higher connectivity of qubits to more than nearest neighbors and/or to a plurality of nearest neighbors. A system can comprise a tunable first coupler coupled to a first qubit, a tunable second coupler coupled to a second qubit, and a junction coupling the first coupler and the second coupler being both parametrically drivable. The first coupler and the second coupler can comprise superconducting quantum interference devices or Josephson junctions. The junction can comprise a central hub or central node separately coupled to the first coupler and the second coupler. The first coupler and the second coupler can be configured to capacitively or inductively couple the first qubit and the second qubit to one another to perform a control-Z (CZ) gate or an iSWAP gate.

公开(公告)号：US20230359918A1

公开(公告)日：2023-11-09

申请号：US17740292

申请日：2022-05-09

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Timothy Phung ,  Muir Kumph

IPC: G06N10/40

CPC classification number: G06N10/40

Abstract: A modular electronic structure includes a first chip having a first interleaved portion and a first electromagnetic coupler on the first interleaved portion. There is a second chip having a second interleaved portion and a second electromagnetic coupler on the second interleaved portion and configured to electromagnetically couple with the first electromagnetic coupler. The first interleaved portion fits between two surfaces of the second chip. The second interleaved portion fits between two surfaces of the first chip.

公开(公告)号：US20230196163A1

公开(公告)日：2023-06-22

申请号：US17644900

申请日：2021-12-17

Applicant: International Business Machines Corporation

Inventor： Harry Jonathon Mamin ,  Timothy Phung ,  Daniel Rugar

IPC: G06N10/40 ,  G06N10/20 ,  H01L23/522

CPC classification number: G06N10/40 ,  G06N10/20 ,  H01L23/5225

Abstract: Techniques regarding shielded superconducting qubits are provided. For example, one or more embodiments described herein can include an apparatus that can comprise a superconducting qubit positioned adjacent to a superconducting ground plane on a substrate. Also, the apparatus can comprise a superconducting shield layer positioned between the superconducting qubit and the superconducting ground plane.