公开(公告)号：US12088309B2

公开(公告)日：2024-09-10

申请号：US17797539

申请日：2021-02-04

申请人： IQM Finland Oy

发明人： Jorge Santos ,  Pasi Lähteenmäki

IPC分类号： H03L7/099 ,  G06F1/08 ,  G06F1/10 ,  G06N10/40 ,  H03K5/01

CPC分类号： H03L7/099 ,  G06F1/08 ,  G06F1/10 ,  G06N10/40 ,  H03K5/01

摘要： A control arrangement is disclosed for providing a plurality of phase-coherent oscillating signals. It comprises a reference clock signal arrangement for providing a high-frequency reference clock signal and a plurality of modules each comprising a plurality of channels for providing the plurality of phase-coherent oscillating signals.

公开(公告)号：US20240242102A1

公开(公告)日：2024-07-18

申请号：US18559664

申请日：2021-05-28

申请人： IQM Finland Oy

发明人： Juha Hassel ,  Mikko Möttönen

IPC分类号： G06N10/40

CPC分类号： G06N10/40

摘要： Disclosed is a quantum-state readout arrangement and a method. A first solid-state qubit may be used for providing a first quantum state and a readout element may be used for determining the first quantum state. The readout element comprises a readout actuator and one or more calorimeters, wherein the dissipation of the readout element is arranged to be dominated by the dissipation stemming from the one or more calorimeters.

公开(公告)号：US11979146B2

公开(公告)日：2024-05-07

申请号：US18374867

申请日：2023-09-29

申请人： IQM FINLAND OY

发明人： Johannes Heinsoo ,  Jani Tuorila

IPC分类号： H03K17/92 ,  G06N10/40 ,  H10N69/00

CPC分类号： H03K17/92 ,  G06N10/40 ,  H10N69/00

摘要： The invention is generally related to the field of quantum computing and particularly to a tunable resonator-resonator coupling circuit that provides both direct and indirect couplings between linear or nonlinear resonators. The indirect coupling is provided by using a tunable coupling element that comprises two ungrounded superconducting islands. Since the superconducting islands are ungrounded, it is possible to provide different signs of coupling frequencies for the resonators and the superconducting islands, which in turn allows the interaction between the first and second resonators to be controlled more efficiently. Moreover, the design, calibration, and operation of the circuit with such a tunable coupling element are significantly easier and simpler compared to the existing analogues, while providing the same or even better performance. A quantum computing apparatus using one or more such circuits is also provided.

公开(公告)号：US11907805B2

公开(公告)日：2024-02-20

申请号：US17495085

申请日：2021-10-06

申请人： IQM Finland Oy

发明人： Caspar Ockeloen-Korppi ,  Tianyi Li ,  Wei Liu ,  Vasilii Sevriuk ,  Tiina Naaranoja ,  Mate Jenei ,  Jan Goetz ,  Kuan Yen Tan ,  Mikko Möttönen ,  Kok Wai Chan

IPC分类号： G06N10/00 ,  H10N60/12 ,  H10N60/80 ,  H10N60/01 ,  H10N69/00

CPC分类号： G06N10/00 ,  H10N60/0912 ,  H10N60/12 ,  H10N60/805 ,  H10N69/00

摘要： A three-dimensional superconducting qubit and a method for manufacturing the same are disclosed. In an example, a three-dimensional superconducting qubit comprises a structural base comprising one or more insulating materials, and superconductive patterns on surfaces of the structural base. The superconductive patterns form at least a capacitive part and an inductive part of the three-dimensional superconducting qubit. A first surface of the surfaces of the structural base defines a first plane and a second surface of the surfaces of the structural base defines a second plane, the second plane being oriented differently than the first plane. At least one superconductive pattern of the superconductive patterns extends from the first surface to the second surface.

公开(公告)号：US20220190027A1

公开(公告)日：2022-06-16

申请号：US17337137

申请日：2021-06-02

申请人： IQM Finland Oy

发明人： Eric Hyyppä ,  Mikko Möttönen ,  Juha Hassel ,  Jani Tuorila

IPC分类号： H01L27/18 ,  H01L39/02 ,  H01L39/22 ,  H01P7/08 ,  G06N10/00

摘要： A quantum processing unit is disclosed. The quantum processing unit includes at least one superconducting qubit that is based on phase-biased linear and non-linear inductive-energy elements. A superconducting phase difference across the linear and non-linear inductive-energy elements is biased, for example, by an external magnetic field, such that quadratic potential energy terms of the linear and non-linear inductive-energy elements are cancelled at least partly. In a preferred embodiment, such cancellation is at least 30%. The partial cancellation of the quadratic potential energy terms makes it possible to implement a high-coherence high-anharmonicity superconducting qubit design.

公开(公告)号：US20210406750A1

公开(公告)日：2021-12-30

申请号：US17087901

申请日：2020-11-03

申请人： IQM Finland Oy

发明人： Tianyi Li ,  Kok Wai Chan ,  Kuan Yen Tan ,  Jan Goetz ,  Mikko Möttönen

IPC分类号： G06N10/00 ,  H01L33/04 ,  H05K7/20

摘要： A method, system, and arrangement for resetting qubits are disclosed. An example system includes one or more quantum circuit refrigerators for resetting qubits. Each of the quantum circuit refrigerators includes a tunneling junction and a control input for receiving a control signal. Photon-assisted single-electron tunneling takes place across the respective tunneling junction in response to a control signal. Capacitive or inductive coupling elements between the qubits and the quantum circuit refrigerators couple each qubit to the quantum circuit refrigerator(s). The qubits, quantum circuit refrigerators, and coupling elements are located in a cryogenically cooled environment. A common control signal line to the control inputs crosses into the cryogenically cooled environment from a room temperature environment.

公开(公告)号：US20210336621A1

公开(公告)日：2021-10-28

申请号：US17284390

申请日：2019-10-10

申请人： IQM Finland Oy

发明人： Mikko Möttönen ,  Joni Ikonen ,  Jan Goetz

IPC分类号： H03K19/164 ,  G06N10/00 ,  H01P7/08 ,  H01L39/22

摘要： For reading out a state of a qubit, a readout input waveform is injected into a system that comprises an information storage element for storing the state of the qubit and a readout resonator that is electromagnetically coupled to said information storage element. A readout output waveform is extracted from said system and detected. The injection of the readout input waveform takes place through an excitation port that is also used to inject excitation waveforms to the information storage element for affecting the state of the qubit. A phase of the readout input waveform is controllably shifted in the course of injecting it into the system.

公开(公告)号：US20210265261A1

公开(公告)日：2021-08-26

申请号：US16932350

申请日：2020-07-17

申请人： IQM Finland Oy

发明人： Kok Wai Chan ,  Tianyi Li ,  Wei Liu ,  Caspar Ockeloen-Korppi

IPC分类号： H01L23/522 ,  H01L27/18 ,  H01L23/532 ,  H01L21/768

摘要： An airbridge implements connections on a superconducting chip. It comprises a strip of superconductive material between a first superconductive area and a second superconductive area. A first end of said strip comprises a first planar end portion attached to and parallel with said first superconductive area, and a second end of said strip comprises a respective second planar end portion. A middle portion is located between said first and second planar end portions, forming a bend away from a plane defined by the surfaces of the first and second superconductive areas. First and second separation lines separate the end portions from the middle portion. At least one of said first and second separation lines is directed otherwise than transversally across said strip.

公开(公告)号：US20200272925A1

公开(公告)日：2020-08-27

申请号：US16066207

申请日：2016-12-27

申请人： IQM Finland Oy

发明人： Mikko MÖTTÖNEN ,  Kuan Yen Tan ,  Matti Partanen

IPC分类号： G06N10/00 ,  H01L23/373 ,  H01L39/22 ,  H01L27/18

摘要： A circuit assembly for cooling a quantum electrical device, use of said circuit assembly, a system and a method for cooling a quantum electric device are provided. The circuit assembly comprises a quantum electric device to be cooled, at least one normal-metal-insulator-superconductor (NIS) tunnel junction electrically connected to the quantum electric device and at least one superconductive lead for supplying a drive voltage VQCR for said at least one NIS tunnel junction. The quantum electric device is cooled when the voltage VQCR is supplied to at least one NIS tunnel junction, said voltage VQCR being equal to or below the voltage NΔ/e, where N=1 or N=2, N is the number of NIS tunnel junctions electrically coupled in series with the means for generating the voltage, Δ is the energy gap in the superconductor density of states, and e is the elementary charge.

公开(公告)号：US20240289672A1

公开(公告)日：2024-08-29

申请号：US18559670

申请日：2021-06-16

申请人： IQM Finland Oy

发明人： Pasi Lähteenmäki

IPC分类号： G06N10/40 ,  G06F13/42

CPC分类号： G06N10/40 ,  G06F13/4282

摘要： In a quantum computing system, each qubit can exhibit a coherent superposition of two quantum states. Reading out the state collapses the superposition into one of the states. Each of a plurality of threshold detectors has an input controllably couplable to a respective qubit. A superconductive parallel to serial converter has parallel inputs and a serial output, of which the parallel inputs are coupled to the outputs of the threshold detectors. A transmitter is coupled to the serial output of the superconductive parallel to serial converter and configured to transmit a signal obtained at said serial output across a boundary of the cryogenically cooled environment in which the qubits, the threshold detectors, the superconductive parallel to serial converter, and the transmitter are located.