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公开(公告)号：AU2020381881A1
公开(公告)日：2022-05-12
申请号：AU2020381881
申请日：2020-11-13
Applicant: IBM
Inventor： ADIGA VIVEKANANDA , SANDBERG MARTIN , RATH DAVID
Abstract: A method of making a Josephson junction in a superconducting qubit includes providing a substrate (100) having a convex structure with a first face (402A) and a second face (402B) meeting at an edge (402C), depositing a first layer of superconducting material (502A) on the first face, oxidizing the first layer to form a layer of oxide material (504A) on a surface of the first layer, and depositing a second layer of the superconducting material (506A) on the second face. A portion of the second layer is in contact with a portion of the layer of oxide material at or in the vicinity of the edge such that the portion of the layer of oxide material is sandwiched between a portion of the first layer and the portion of the second layer to define the Josephson junction at or in the vicinity of the edge.
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公开(公告)号：IL286610D0
公开(公告)日：2021-10-31
申请号：IL28661021
申请日：2021-09-22
Applicant: IBM , SANDBERG MARTIN , ADIGA VIVEKANANDA , TOPALOGLU RASIT ONUR
Inventor： SANDBERG MARTIN , ADIGA VIVEKANANDA , TOPALOGLU RASIT ONUR
Abstract: A fluxonium qubit includes a superinductor. The superinductor includes a substrate, and a first vertical stack extending in a vertical direction from a surface of the substrate. The first vertical stack includes a first Josephson junction and a second Josephson junction connected in series along the vertical direction. The superinductor includes a second vertical stack extending in a vertical direction from a surface of the substrate. The second vertical stack includes a third Josephson junction. The superinductor includes a superconducting connector connecting the first and second vertical stacks in series such that the first, second, and third Josephson junctions are connected in series. The fluxonium qubit further includes a shunted Josephson junction connected to the superinductor with superconducting wires such that the first, second, and third Josephson junctions of the superinductor that are in series are connected in parallel with the shunted Josephson junction.
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公开(公告)号：AU2021294859A1
公开(公告)日：2022-11-17
申请号：AU2021294859
申请日：2021-06-17
Applicant: IBM
Inventor： GILL DOUGLAS , SANDBERG MARTIN , ADIGA VIVEKANANDA , MARTIN YVES , PAIK HANHEE
Abstract: A method for improving lifetime and coherence time of a qubit in a quantum mechanical device includes providing a substrate having at least one qubit formed on the frontside, the at least one qubit having capacitor pads, and removing substrate material from the backside at an area opposite the qubit and/or depositing a superconducting metal layer at the backside area opposite the qubit to reduce radiofrequency electrical current loss due to at least one of silicon-air (SA) interface, metal-air (MA) interface or silicon-metal (SM) interface.
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公开(公告)号：AU2020399936A1
公开(公告)日：2022-05-26
申请号：AU2020399936
申请日：2020-12-07
Applicant: IBM
Inventor： ADIGA VIVEKANANDA , SANDBERG MARTIN , SOLGUN FIRAT , CHOW JERRY
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 (102) comprises a readout resonator (104) coupled to a qubit. The device can further comprise a switch device (108) 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 comprises 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：BR112021021289A2
公开(公告)日：2022-01-18
申请号：BR112021021289
申请日：2020-03-27
Applicant: IBM
Inventor： SANDBERG MARTIN , RASIT ONUR TOPALOGLU , ROSENBLATT SAMI
IPC: H01L27/18 , G06N10/00 , H01L39/12 , H03K19/195
Abstract: metodologia de viés de fluxo persistente para circuitos fechados supercondutores. um dispositivo qubit ajustável inclui um qubit ajustável, o qubit ajustável incluindo um circuito fechado de dispositivo de interferência quântica supercondutor (squid). o dispositivo de qubit ajustável inclui ainda um circuito fechado supercondutor indutivo acoplado ao circuito fechado squid, e uma linha de viés de fluxo indutivamente acoplada ao circuito fechado supercondutor. o circuito fechado supercondutor inclui um material supercondutor com uma temperatura crítica que é uma temperatura mais baixa do que uma temperatura crítica de qualquer material supercondutor do qubit ajustável. em operação, o circuito fechado supercondutor fornece um viés persistente ao qubit ajustável.
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Patent Agency Ranking
公开(公告)号：IL287254D0
公开(公告)日：2021-12-01
申请号：IL28725421
申请日：2021-10-13
Applicant: IBM , SANDBERG MARTIN , ROSENBLATT SAMI , TOPALOGLU RASIT ONUR
Inventor： SANDBERG MARTIN , ROSENBLATT SAMI , TOPALOGLU RASIT ONUR
Abstract: A tunable qubit device includes a tunable qubit, the tunable qubit including a superconducting quantum interference device (SQUID) loop. The tunable qubit device further includes a superconducting loop inductively coupled to the SQUID loop, and a flux bias line inductively coupled to the superconducting loop. The superconducting loop includes a superconducting material having a critical temperature that is a lower temperature than a critical temperature of any superconducting material of the tunable qubit. In operation, the superconducting loop provides a persistent bias to the tunable qubit.
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公开(公告)号：IL286615D0
公开(公告)日：2021-10-31
申请号：IL28661521
申请日：2021-09-22
Applicant: IBM , ADIGA VIVEKANANDA , SANDBERG MARTIN , CHOW JERRY , PAIK HANHEE
Inventor： ADIGA VIVEKANANDA , SANDBERG MARTIN , CHOW JERRY , PAIK HANHEE
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：SG11202110239YA
公开(公告)日：2021-10-28
申请号：SG11202110239Y
申请日：2020-04-06
Applicant: IBM
Inventor： ADIGA VIVEKANANDA , SANDBERG MARTIN , CHOW JERRY , PAIK HANHEE
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：SG11202109840WA
公开(公告)日：2021-10-28
申请号：SG11202109840W
申请日：2020-03-27
Applicant: IBM
Inventor： SANDBERG MARTIN , ROSENBLATT SAMI , TOPALOGLU RASIT
IPC: G06N10/00 , H01L27/18 , H01L39/12 , H03K19/195
Abstract: A tunable qubit device includes a tunable qubit, the tunable qubit including a superconducting quantum interference device (SQUID) loop. The tunable qubit device further includes a superconducting loop inductively coupled to the SQUID loop, and a flux bias line inductively coupled to the superconducting loop. The superconducting loop includes a superconducting material having a critical temperature that is a lower temperature than a critical temperature of any superconducting material of the tunable qubit. In operation, the superconducting loop provides a persistent bias to the tunable qubit.
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公开(公告)号：AU2020297854A1
公开(公告)日：2021-10-14
申请号：AU2020297854
申请日：2020-05-13
Applicant: IBM
Inventor： LEWANDOWSKI ERIC PETER , WEBB BUCKNELL , HERTZBERG JARED BARNEY , SANDBERG MARTIN , JINKA OBLESH
IPC: H01L23/44
Abstract: A thermalization structure is formed using a foil and a low temperature device (LTD). The foil includes a first layer of a first material. The LTD includes a surface from which heat is transferred away from the LTD. A coupling is formed between the foil and the surface of the LTD, where the coupling includes a bond formed between the foil and the surface such that forming the bond forms a set of ridges in the foil, a ridge in the set of ridges operating to dissipate the heat.
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