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公开(公告)号：US20160125309A1
公开(公告)日：2016-05-05
申请号：US14532638
申请日：2014-11-04
CPC分类号： G06N99/002 , B82Y10/00 , H01P7/00 , H01P7/08 , H01P7/082
摘要： Quantum systems are provided, including a qubit and a transmission line resonator having an associated resonant wavelength. A coupling capacitor is configured to capacitively couple the qubit to the transmission line resonator. A transformer is configured to inductively couple the qubit to the transmission line resonator. A selected one of an associated capacitance of the coupling capacitor and an associated mutual inductance of the transformer is a function of a location of the qubit along the transmission line resonator.
摘要翻译： 提供量子系统，包括量子位和具有相关共振波长的传输线谐振器。 耦合电容器被配置为将量子位电容耦合到传输线谐振器。 变压器被配置为将量子位感应耦合到传输线谐振器。 耦合电容器的相关联的电容中选定的一个和变压器的相关联的电感是沿着传输线谐振器的量子位的位置的函数。
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公开(公告)号：US09501748B2
公开(公告)日：2016-11-22
申请号：US14532638
申请日：2014-11-04
CPC分类号： G06N99/002 , B82Y10/00 , H01P7/00 , H01P7/08 , H01P7/082
摘要： Quantum systems are provided, including a qubit and a transmission line resonator having an associated resonant wavelength. A coupling capacitor is configured to capacitively couple the qubit to the transmission line resonator. A transformer is configured to inductively couple the qubit to the transmission line resonator. A selected one of an associated capacitance of the coupling capacitor and an associated mutual inductance of the transformer is a function of a location of the qubit along the transmission line resonator.
摘要翻译： 提供量子系统，包括量子位和具有相关共振波长的传输线谐振器。 耦合电容器被配置为将量子位电容耦合到传输线谐振器。 变压器被配置为将量子位感应耦合到传输线谐振器。 耦合电容器的相关联的电容中选定的一个和变压器的相关联的电感是沿着传输线谐振器的量子位的位置的函数。
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公开(公告)号：US10164606B1
公开(公告)日：2018-12-25
申请号：US15868416
申请日：2018-01-11
申请人： Zachary Kyle Keane , Joel D. Strand , Ofer Naaman
发明人： Zachary Kyle Keane , Joel D. Strand , Ofer Naaman
IPC分类号： H03H11/04 , H03K19/0175 , H03K19/195 , H01L39/22
摘要： A load-compensated tunable coupler leverages a cross-bar switch and simulated loads or ballasts to provide a tunable coupling between two quantum objects that can be selectively coupled or decoupled without changing their resonant frequencies.
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公开(公告)号：US10540603B2
公开(公告)日：2020-01-21
申请号：US16012543
申请日：2018-06-19
IPC分类号： G06N10/00 , H04B10/70 , H04L12/933 , G01R33/035 , H04Q3/52 , H01P1/15
摘要： Real-time reconfigurability of quantum object connectivity can be provided with one or more quantum routers that can each be configured as either or both of a single-pole double-throw switch and a cross-point switch. The quantum router includes variable-inductance coupling elements in RF-SQUIDs having inductors transformer-coupled to two control flux lines, one providing a static current and the other providing a dynamic current, the direction of which can be toggled to couple or uncouple quantum objects, such as qubits, based on the dynamic current direction to provide reconfigurable quantum routing.
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公开(公告)号：US10353844B2
公开(公告)日：2019-07-16
申请号：US16026573
申请日：2018-07-03
摘要： A tunable bus-mediated coupling system is provided that includes a first input port coupled to a first end of a variable inductance coupling element through a first resonator and a second input port coupled to a second end of the variable inductance coupling element through a second resonator. The first input port is configured to be coupled to a first qubit, and the second output port is configured to be coupled to a second qubit. A controller is configured to control the inductance of the variable inductance coupling element between a low inductance state to provide strong coupling between the first qubit and the second qubit and a high inductance state to provide isolation between the first qubit and the second qubit.
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公开(公告)号：US10042805B2
公开(公告)日：2018-08-07
申请号：US15003232
申请日：2016-01-21
摘要： A tunable bus-mediated coupling system is provided that includes a first input port coupled to a first end of a variable inductance coupling element through a first resonator and a second input port coupled to a second end of the variable inductance coupling element through a second resonator. The first input port is configured to be coupled to a first qubit, and the second output port is configured to be coupled to a second qubit. A controller is configured to control the inductance of the variable inductance coupling element between a low inductance state to provide strong coupling between the first qubit and the second qubit and a high inductance state to provide isolation between the first qubit and the second qubit.
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公开(公告)号：US11616187B2
公开(公告)日：2023-03-28
申请号：US17168443
申请日：2021-02-05
申请人： Aurelius L. Graninger , Joel D. Strand , Micah John Atman Stoutimore , Zachary Kyle Keane , Jeffrey David Hartman , Justin C. Hackley
发明人： Aurelius L. Graninger , Joel D. Strand , Micah John Atman Stoutimore , Zachary Kyle Keane , Jeffrey David Hartman , Justin C. Hackley
IPC分类号： H01L39/02 , G01R31/28 , H01L21/66 , H01L23/00 , H01L25/065 , H01L27/18 , H01L39/08 , H01L39/10 , H01L39/12 , H01L39/06 , H01L39/22
摘要： Test structures and methods for superconducting bump bond electrical characterization are used to verify the superconductivity of bump bonds that electrically connect two superconducting integrated circuit chips fabricated using a flip-chip process, and can also ascertain the self-inductance of bump bond(s) between chips. The structures and methods leverage a behavioral property of superconducting DC SQUIDs to modulate a critical current upon injection of magnetic flux in the SQUID loop, which behavior is not present when the SQUID is not superconducting, by including bump bond(s) within the loop, which loop is split among chips. The sensitivity of the bump bond superconductivity verification is therefore effectively perfect, independent of any multi-milliohm noise floor that may exist in measurement equipment.
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公开(公告)号：US10950778B2
公开(公告)日：2021-03-16
申请号：US16241661
申请日：2019-01-07
申请人： Aurelius L. Graninger , Joel D. Strand , Micah John Atman Stoutimore , Zachary Kyle Keane , Jeffrey David Hartman , Justin C. Hackley
发明人： Aurelius L. Graninger , Joel D. Strand , Micah John Atman Stoutimore , Zachary Kyle Keane , Jeffrey David Hartman , Justin C. Hackley
IPC分类号： H01L29/06 , H01L39/02 , G01R31/28 , H01L21/66 , H01L23/00 , H01L25/065 , H01L27/18 , H01L39/08 , H01L39/10 , H01L39/12 , H01L39/06 , H01L39/22
摘要： Test structures and methods for superconducting bump bond electrical characterization are used to verify the superconductivity of bump bonds that electrically connect two superconducting integrated circuit chips fabricated using a flip-chip process, and can also ascertain the self-inductance of bump bond(s) between chips. The structures and methods leverage a behavioral property of superconducting DC SQUIDs to modulate a critical current upon injection of magnetic flux in the SQUID loop, which behavior is not present when the SQUID is not superconducting, by including bump bond(s) within the loop, which loop is split among chips. The sensitivity of the bump bond superconductivity verification is therefore effectively perfect, independent of any multi-milliohm noise floor that may exist in measurement equipment.
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公开(公告)号：US11431322B2
公开(公告)日：2022-08-30
申请号：US17383779
申请日：2021-07-23
申请人： Zachary Kyle Keane
发明人： Zachary Kyle Keane
IPC分类号： H03H11/04 , H01L39/22 , H01L39/02 , H03K19/0175 , H03K19/195 , H03K3/38
摘要： A capacitively-driven tunable coupler includes a coupling capacitor connecting an open end of a quantum object (i.e., an end of the object that cannot have a DC path to a low-voltage rail, such as a ground node, without breaking the functionality of the object) to an RF SQUID having a Josephson element capable of providing variable inductance and therefore variable coupling to another quantum object.
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公开(公告)号：US10158343B1
公开(公告)日：2018-12-18
申请号：US15868607
申请日：2018-01-11
摘要： A push-pull tunable coupler includes a push transformer, a pull transformer and two compound Josephson junctions arranged in upper and lower branches. Absent biasing, the balanced push and pull of current between the branches causes current from a first object to circulate within a loop and not to be coupled to a second object. Biasing of at least one of the compound Josephson junctions unbalances the push and pull of current in the branches to couple the first and second objects. The coupler has reduced sensitivity to differential-mode noise around the off state, is completely insensitive to common-mode noise, and is capable of inverting the coupled signal with appropriate relative biasing of the compound Josephson junctions.
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