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公开(公告)号：US11443223B1
公开(公告)日：2022-09-13
申请号：US17128349
申请日：2020-12-21
Applicant: International Business Machines Corporation
Inventor： Jerry M. Chow , Sami Rosenblatt
Abstract: A quantum computing device is formed using a first chip and a second chip, the first chip having a first substrate, a first set of pads, and a set of Josephson junctions disposed on the first substrate. The second chip has a second substrate, a second set of pads disposed on the second substrate opposite the first set of pads, and a second layer formed on a subset of the second set of pads. The second layer is configured to bond the first chip and the second chip. The subset of the second set of pads corresponds to a subset of the set of Josephson junctions selected to avoid frequency collision between qubits in a set of qubits. A qubit is formed using a Josephson junction from the subset of Josephson junctions and another Josephson junction not in the subset being rendered unusable for forming qubits.
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公开(公告)号：US11443222B2
公开(公告)日：2022-09-13
申请号：US16666553
申请日：2019-10-29
Applicant: International Business Machines Corporation
Inventor： Jerry M. Chow , Antonio D. Corcoles-Gonzalez , Jay M. Gambetta
Abstract: A signal generating system is provided. The signal generating system provides a microwave signal to a plurality of qubits. The signal generating system includes a generator, an oscillator, a mixer, and a splitter. The oscillator generates an oscillator signal including a constant frequency. The generator generates a generator signal including an initial frequency. The mixer is electrically coupled to the generator and the oscillator. The mixer combines the generator and oscillator signals to produce the microwave signal. The splitter is electrically coupled to the mixer. The splitter fans-out the microwave signal to a plurality of physical lines. Each of the plurality of physical lines is electrically connected to a corresponding one of the plurality of qubits.
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公开(公告)号：US20210175026A1
公开(公告)日：2021-06-10
申请号：US16709350
申请日：2019-12-10
Applicant: International Business Machines Corporation
Inventor： Vivekananda P. Adiga , Martin O. Sandberg , Firat Solgun , Jerry M. Chow
Abstract: Devices, systems, methods, computer-implemented methods, apparatus, and/or computer program products that can facilitate a switch device that shifts frequency of a resonator in a quantum device are provided. According to an embodiment, a device can comprise a readout resonator coupled to a qubit. The device can further comprise a switch device formed across the readout resonator that shifts frequency of the readout resonator based on position of the switch device. According to another embodiment, a device can comprise a bus resonator coupled to a plurality of qubits. The device can further comprise a switch device formed across the bus resonator that shifts frequency of the bus resonator based on position of the switch device.
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公开(公告)号：US10957737B2
公开(公告)日：2021-03-23
申请号：US16735851
申请日：2020-01-07
Applicant: International Business Machines Corporation
Inventor： Vivekananda P. Adiga , Martin O. Sandberg , Jerry M. Chow , Hanhee Paik
Abstract: Symmetrical qubits with reduced far-field radiation are provided. In one example, a qubit device includes a first group of superconducting capacitor pads positioned about a defined location of the qubit device, wherein the first group of superconducting capacitor pads comprise two or more superconducting capacitor pads having a first polarity, and a second group of superconducting capacitor pads positioned about the defined location of the qubit device in an alternating arrangement with the first group of superconducting capacitor pads, wherein the second group of superconducting capacitor pads comprise two or more superconducting capacitor pads having a second polarity that is opposite the first polarity.
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公开(公告)号：US10833680B2
公开(公告)日：2020-11-10
申请号：US16570702
申请日：2019-09-13
Applicant: International Business Machines Corporation
Inventor： David C. Mckay , Jay M. Gambetta , Jerry M. Chow
IPC: H03K19/195 , H03H11/04 , G06N10/00
Abstract: In an embodiment, a quantum circuit (circuit) includes a first qubit and a second qubit. In an embodiment, a quantum circuit includes a tunable microwave resonator, wherein a first applied magnetic flux is configured to tune the microwave resonator to a first frequency, the first frequency configured to activate an interaction between the first qubit and the second qubit, and wherein a second applied magnetic flux is configured to tune the microwave resonator to a second frequency, the second frequency configured to minimize an interaction between the first qubit and the second qubit.
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Patent Agency Ranking
公开(公告)号：US20200328338A1
公开(公告)日：2020-10-15
申请号：US16381563
申请日：2019-04-11
Applicant: International Business Machines Corporation
Inventor： Vivekananda P. Adiga , Martin O. Sandberg , Jerry M. Chow , Hanhee Paik
Abstract: A qubit includes a substrate, and a first capacitor structure having a lower portion formed on a surface of the substrate and at least one first raised portion extending above the surface of the substrate. The qubit further includes a second capacitor structure having a lower portion formed on the surface of the substrate and at least one second raised portion extending above the surface of the substrate. The first capacitor structure and the second capacitor structure are formed of a superconducting material. The qubit further includes a junction between the first capacitor structure and the second capacitor structure. The junction is disposed at a predetermined distance from the surface of the substrate and has a first end in contact with the first raised portion and a second end in contact with the second raised portion.
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公开(公告)号：US10592814B2
公开(公告)日：2020-03-17
申请号：US15828613
申请日：2017-12-01
Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
Inventor： Dongbing Shao , Markus Brink , Salvatore B. Olivadese , Jerry M. Chow
Abstract: Generating a layout for a multi-qubit chip is provided. A schematic is received as input. The schematic input includes a plurality of qubits, a plurality of coupling busses, a bus design parameter specifying a bus frequency, a plurality of readout busses, and a plurality of readout ports. A qubit design is selected from a qubit library, based on the qubit style in the schematic input. A bus style is selected from a bus information library, based on the bus style in the schematic input. A qubit layout is automatically generated by assembling the selected bus style/, selected qubit design, the plurality of readout busses and the plurality of readout ports.
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公开(公告)号：US20200043977A1
公开(公告)日：2020-02-06
申请号：US16054326
申请日：2018-08-03
Applicant: International Business Machines Corporation
Inventor： Vivekananda P. Adiga , Martin O. Sandberg , Jerry M. Chow , Hanhee Paik
Abstract: Symmetrical qubits with reduced far-field radiation are provided. In one example, a qubit device includes a first group of superconducting capacitor pads positioned about a defined location of the qubit device, wherein the first group of superconducting capacitor pads comprise two or more superconducting capacitor pads having a first polarity, and a second group of superconducting capacitor pads positioned about the defined location of the qubit device in an alternating arrangement with the first group of superconducting capacitor pads, wherein the second group of superconducting capacitor pads comprise two or more superconducting capacitor pads having a second polarity that is opposite the first polarity.
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公开(公告)号：US10528885B2
公开(公告)日：2020-01-07
申请号：US15720927
申请日：2017-09-29
Applicant: International Business Machines Corporation
Inventor： Jerry M. Chow , Antonio D. Corcoles-Gonzalez , Jay M. Gambetta
Abstract: A signal generating system is provided. The signal generating system provides a microwave signal to a plurality of qubits. The signal generating system includes a generator, an oscillator, a mixer, and a splitter. The oscillator generates an oscillator signal including a constant frequency. The generator generates a generator signal including an initial frequency. The mixer is electrically coupled to the generator and the oscillator. The mixer combines the generator and oscillator signals to produce the microwave signal. The splitter is electrically coupled to the mixer. The splitter fans-out the microwave signal to a plurality of physical lines. Each of the plurality of physical lines is electrically connected to a corresponding one of the plurality of qubits.
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30.发明授权公开(公告)号：US09953269B2
公开(公告)日：2018-04-24
申请号：US15175454
申请日：2016-06-07
Applicant: International Business Machines Corporation
Inventor： Jerry M. Chow , Jay M. Gambetta , Mary B. Rothwell , James R. Rozen
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.
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