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公开(公告)号：US11264089B1
公开(公告)日：2022-03-01
申请号：US17001461
申请日：2020-08-24
申请人： SeeQC Inc.
摘要： A superconducting memory cell includes a magnetic Josephson junction (MJJ) with a ferromagnetic material, having at least two switchable states of magnetization. The binary state of the MJJ manifests itself as a pulse appearing, or not appearing, on the output. A superconducting memory includes an array of memory cells. Each memory cell includes a comparator with at least one MJJ. Selected X and Y-directional write lines in their combination are capable of switching the magnetization of the MJJ. A superconducting device includes a first and a second junction in a stacked configuration. The first junction has an insulating layer barrier, and the second junction has an insulating layer sandwiched in-between two ferromagnetic layers as barrier. An electrical signal inputted across the first junction is amplified across the second junction.
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公开(公告)号：US10950299B1
公开(公告)日：2021-03-16
申请号：US16666122
申请日：2019-10-28
申请人： SeeQC, Inc.
发明人： Oleg A. Mukhanov , Alexander F. Kirichenko , Igor V. Vernik , Ivan P. Nevirkovets , Alan M. Kadin
IPC分类号： G11C11/44 , G11C11/16 , G11C11/18 , A61K8/25 , A61Q19/08 , G06N10/00 , A61K8/20 , A61K8/34 , A61Q19/00 , A61K8/02 , A61K8/73 , G01R33/035 , A61K8/42 , G01R33/12 , G11C7/10 , H01L39/22 , H01L27/18
摘要： A system and method for high-speed, low-power cryogenic computing are presented, comprising ultrafast energy-efficient RSFQ superconducting computing circuits, and hybrid magnetic/superconducting memory arrays and interface circuits, operating together in the same cryogenic environment. An arithmetic logic unit and register file with an ultrafast asynchronous wave-pipelined datapath is also provided. The superconducting circuits may comprise inductive elements fabricated using both a high-inductance layer and a low-inductance layer. The memory cells may comprise superconducting tunnel junctions that incorporate magnetic layers. Alternatively, the memory cells may comprise superconducting spin transfer magnetic devices (such as orthogonal spin transfer and spin-Hall effect devices). Together, these technologies may enable the production of an advanced superconducting computer that operates at clock speeds up to 100 GHz.
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公开(公告)号：US20200350880A1
公开(公告)日：2020-11-05
申请号：US16402148
申请日：2019-05-02
申请人： SeeQC, Inc.
发明人： Alessandro Miano , Oleg A. Mukhanov
摘要： A system and method are disclosed for a superconducting traveling-wave parametric amplifier (TWPA) with improved control and performance. In a preferred embodiment, the amplifier comprises an integrated array of symmetric rf-SQUIDs in a transmission line structure. A device was fabricated using niobium superconducting integrated circuits, and confirmed predicted performance, with a maximum gain up to 17 dB and a bandwidth of 4 GHz. A similar device can be applied as a low-noise, low-dissipation microwave amplifier for output from a superconducting quantum computer, or as a preamplifier, switch, or frequency converter for a sensitive microwave receiver, or as an output amplifier for a frequency-multiplexed superconducting detector array.
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公开(公告)号：US20220399145A1
公开(公告)日：2022-12-15
申请号：US17838207
申请日：2022-06-11
申请人： SeeQC Inc.
发明人： Alex F. Kirichenko , Amir Jafari-Salim , Patrick Truitt , Naveen Kumar Katam , Caleb Jordan , Oleg A. Mukhanov
IPC分类号： H01F6/00
摘要： Quantum computing systems require methods to control energies of qubits and couplers for quantum operations. Flux biasing of qubits and quantum couplers is provided for a superconducting quantum computer using single-flux-quantum (SFQ) technology. This method is applicable to a wide range of superconducting qubit structures and couplers, including transmons, fluxoniums, flux qubits, phase qubits and other superconducting qubits. This method enables arbitrary-amplitude time-varying flux biasing of qubits and couplers, due to a sequence of high-speed SFQ pulses. Several preferred embodiments are disclosed which provide high-fidelity control of fast single-qubit and multi-qubit operations.
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公开(公告)号：US11115131B1
公开(公告)日：2021-09-07
申请号：US16867462
申请日：2020-05-05
申请人： SeeQC, Inc. , Center for Technology Licensing at Cornell University , The Trustees of Columbia University in The City of New York
发明人： Igor V. Vernik , Oleg A. Mukhanov , Alan M. Kadin , Christopher T. Phare , Michal Lipson , Keren Bergman
IPC分类号： H04B10/50 , H04B10/54 , H04B10/80 , H04B10/556
摘要： A cryogenic optoelectronic data link, comprising a sending module operating at a cryogenic temperature less than 100 K. An ultrasensitive electro-optic modulator, sensitive to input voltages of less than 10 mV, may include at least one optically active layer of graphene, which may be part of a microscale resonator, which in turn may be integrated with an optical waveguide or an optical fiber. The optoelectronic data link enables optical output of weak electrical signals from superconducting or other cryogenic electronic devices in either digital or analog form. The modulator may be integrated on the same chip as the cryogenic electrical devices. A plurality of cryogenic electrical devices may generate a plurality of electrical signals, each coupled to its own modulator. The plurality of modulators may be resonant at different frequencies, and coupled to a common optical output line to transmit a combined wavelength-division-multiplexed (WDM) optical signal.
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公开(公告)号：US20210265964A1
公开(公告)日：2021-08-26
申请号：US17246535
申请日：2021-04-30
申请人： SeeQC, Inc.
发明人： Alessandro Miano , Oleg A. Mukhanov
摘要： A system and method are disclosed for a superconducting traveling-wave parametric amplifier (TWPA) with improved control and performance. In a preferred embodiment, the amplifier comprises an integrated array of symmetric rf-SQUIDs in a transmission line structure. A device was fabricated using niobium superconducting integrated circuits, and confirmed predicted performance, with a maximum gain up to 17 dB and a bandwidth of 4 GHz. A similar device can be applied as a low-noise, low-dissipation microwave amplifier for output from a superconducting quantum computer, or as a preamplifier, switch, or frequency converter for a sensitive microwave receiver, or as an output amplifier for a frequency-multiplexed superconducting detector array.
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公开(公告)号：US20220237495A1
公开(公告)日：2022-07-28
申请号：US17501897
申请日：2021-10-14
申请人： SeeQC, Inc.
发明人： Daniel Yohannes , Igor Vernik , Caleb Jordan , Patrick Truitt , Alex Kirichenko , Amir Jafari Salim , Naveen Katam , Oleg Mukhanov
摘要： The technology disclosed in this patent document can be implemented to combine quantum computing, classical qubit control/readout, and classical digital computing in a scalable computing system based on superconducting qubits and special interconnection designs for connecting hardware components within a multi-stage cryogenic system to provide fast communications between the quantum computing module and its controller while allowing efficient management of wiring with other modules.
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公开(公告)号：US20210408355A1
公开(公告)日：2021-12-30
申请号：US17472821
申请日：2021-09-13
申请人： SeeQC, Inc.
发明人： Daniel Yohannes , Denis Amparo , Oleksandr Chernyashevskyy , Oleg Mukhanov , Mario Renzullo , Andrei Talalaeskii , Igor Vernik , John Vivalda , Jason Walter
摘要： A method for bonding two superconducting integrated circuits (“chips”), such that the bonds electrically interconnect the chips. A plurality of indium-coated metallic posts may be deposited on each chip. The indium bumps are aligned and compressed with moderate pressure at a temperature at which the indium is deformable but not molten, forming fully superconducting connections between the two chips when the indium is cooled down to the superconducting state. An anti-diffusion layer may be applied below the indium bumps to block reaction with underlying layers. The method is scalable to a large number of small contacts on the wafer scale, and may be used to manufacture a multi-chip module comprising a plurality of chips on a common carrier. Superconducting classical and quantum computers and superconducting sensor arrays may be packaged.
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公开(公告)号：US20210226635A1
公开(公告)日：2021-07-22
申请号：US17170887
申请日：2021-02-08
申请人： SeeQC, Inc.
IPC分类号： H03K19/195 , H03K3/38 , H01L39/22 , G06N10/00
摘要： A superconducting integrated circuit, comprising a plurality of superconducting circuit elements, each having a variation in operating voltage over time; a common power line; and a plurality of bias circuits, each connected to the common power line, and to a respective superconducting circuit element, wherein each respective bias circuit is superconducting during at least one time portion of the operation of a respective superconducting circuit element, and is configured to supply the variation in operating voltage over time to the respective superconducting circuit element.
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公开(公告)号：US10998869B2
公开(公告)日：2021-05-04
申请号：US16402148
申请日：2019-05-02
申请人： SeeQC, Inc.
发明人： Alessandro Miano , Oleg A. Mukhanov
摘要： A system and method are disclosed for a superconducting traveling-wave parametric amplifier (TWPA) with improved control and performance. In a preferred embodiment, the amplifier comprises an integrated array of symmetric rf-SQUIDs in a transmission line structure. A device was fabricated using niobium superconducting integrated circuits, and confirmed predicted performance, with a maximum gain up to 17 dB and a bandwidth of 4 GHz. A similar device can be applied as a low-noise, low-dissipation microwave amplifier for output from a superconducting quantum computer, or as a preamplifier, switch, or frequency converter for a sensitive microwave receiver, or as an output amplifier for a frequency-multiplexed superconducting detector array.
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