Patents by Inventor Baleegh Abdo

Baleegh Abdo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11940392
    Abstract: Techniques that facilitate a measurement scheme for superconducting qubits using low-frequency microwave signals within a dilution refrigerator are provided. In one example, a cryogenic microwave system for measuring superconducting qubits using microwave signals includes a dilution refrigerator system for a quantum processor. The dilution refrigerator system converts a microwave signal associated with qubit information into a reduced-frequency microwave signal based on a Josephson-mixer circuit located within the dilution refrigerator system. The reduced-frequency microwave signal includes a frequency below a qubit frequency and a readout resonator frequency associated with the quantum processor.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: March 26, 2024
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Patent number: 11888471
    Abstract: One or more systems, devices and/or methods of use provided herein relate to a device that can provide bandwidth and/or saturation power to amplify a plurality of readout frequencies or to convert one or more frequencies. In quantum technology, the one or more systems, devices and/or methods of use provided herein can be employed to simultaneously readout a plurality of qubit resonators. A device can comprise a Josephson parametric converter device comprising a Josephson ring modulator having a pair of nodes, and an impedance matching circuit network operatively connected across the pair of nodes. The device can be separately operable in an amplification mode or in a conversion mode.
    Type: Grant
    Filed: December 27, 2021
    Date of Patent: January 30, 2024
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Corrado P Mancini, Baleegh Abdo
  • Patent number: 11758828
    Abstract: High-saturation power Josephson ring modulators and fabrication of the same are provided. A Josephson ring modulator can comprise a plurality of matrix junctions. Matrix junctions of the plurality of matrix junctions can comprise respective superconducting parallel branches that can comprise a plurality of Josephson junctions operatively coupled in a series configuration. A method can comprise forming a first matrix junction comprising arranging a first group of Josephson junctions as first parallel branches. The method can also comprise forming a second matrix junction comprising arranging a second group of Josephson junctions as second parallel branches. Further, the method can comprise forming a third matrix junction comprising arranging a third group of Josephson junctions as third parallel branches. In addition, the method can comprise forming a fourth matrix junction comprising arranging a fourth group of Josephson junctions as fourth parallel branches.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: September 12, 2023
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Patent number: 11728772
    Abstract: A superconducting device that mixes surface acoustic waves and microwave signals and techniques for fabricating the same are provided. A superconducting device can comprise a superconducting surface acoustic wave resonator and a superconducting microwave resonator. The superconducting device can also comprise a Josephson ring modulator coupled to the superconducting surface acoustic wave resonator and the superconducting microwave resonator. The Josephson ring modulator can be a dispersive nonlinear three-wave mixing element.
    Type: Grant
    Filed: April 7, 2021
    Date of Patent: August 15, 2023
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Publication number: 20230225224
    Abstract: A superconducting quantum mechanical device includes first, second, third and fourth Josephson junctions connected in a bridge circuit having first, second and third resonance eigenmodes. The device also includes first and second capacitor pads. The first and second capacitor pads and the bridge circuit form a superconducting qubit having a resonance frequency corresponding to the first resonance eigenmode. The device further includes first and second resonator sections. The first and second resonator sections and the bridge circuit form a resonator having a resonance frequency corresponding to the second resonance eigenmode. The device also includes a source of magnetic flux arranged proximate the bridge circuit. The source of magnetic flux is configured to provide, during operation, a magnetic flux through the bridge circuit to cause coupling between the first, second and third resonance eigenmodes when the third resonance eigenmode is excited.
    Type: Application
    Filed: November 15, 2022
    Publication date: July 13, 2023
    Inventor: Baleegh ABDO
  • Publication number: 20230208419
    Abstract: One or more systems, devices and/or methods of use provided herein relate to a device that can provide bandwidth and/or saturation power to amplify a plurality of readout frequencies or to convert one or more frequencies. In quantum technology, the one or more systems, devices and/or methods of use provided herein can be employed to simultaneously readout a plurality of qubit resonators. A device can comprise a Josephson parametric converter device comprising a Josephson ring modulator having a pair of nodes, and an impedance matching circuit network operatively connected across the pair of nodes. The device can be separately operable in an amplification mode or in a conversion mode.
    Type: Application
    Filed: December 27, 2021
    Publication date: June 29, 2023
    Inventors: Corrado P. Mancini, BALEEGH ABDO
  • Publication number: 20230155593
    Abstract: A quantum circuit includes a quantum signal unit. There is a first quantum chip comprising a plurality of qubit devices and bi-directionally coupled to the quantum signal unit. A first quantum entangling unit is bi-directionally coupled to the quantum signal unit and configured to generate an entanglement between a first and a second qubit device on the first quantum chip via the quantum signal unit.
    Type: Application
    Filed: November 13, 2021
    Publication date: May 18, 2023
    Inventors: Baleegh Abdo, Jerry M. Chow
  • Patent number: 11599819
    Abstract: A technique relates to configuring a superconducting router. The superconducting router is operated in a first mode. Ports are configured to be in reflection in the first mode in order to reflect a signal. The superconducting router is operated in a second mode. A given pair of the ports is connected together and in transmission in the second mode, such that the signal is permitted to pass between the given pair of the ports.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: March 7, 2023
    Assignee: International Business Machines Corporation
    Inventor: Baleegh Abdo
  • Patent number: 11552239
    Abstract: A superconducting quantum mechanical device includes first, second, third and fourth Josephson junctions connected in a bridge circuit having first, second and third resonance eigenmodes. The device also includes first and second capacitor pads. The first and second capacitor pads and the bridge circuit form a superconducting qubit having a resonance frequency corresponding to the first resonance eigenmode. The device further includes first and second resonator sections. The first and second resonator sections and the bridge circuit form a resonator having a resonance frequency corresponding to the second resonance eigenmode. The device also includes a source of magnetic flux arranged proximate the bridge circuit. The source of magnetic flux is configured to provide, during operation, a magnetic flux through the bridge circuit to cause coupling between the first, second and third resonance eigenmodes when the third resonance eigenmode is excited.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: January 10, 2023
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Patent number: 11515461
    Abstract: Techniques for trapping quasiparticles in superconductor devices are provided. A superconductor device can comprise a substrate layer. The superconductor device can further comprise a first superconductor layer composed of a first superconductor material, on a first surface of a substrate layer. The superconductor device can further comprise a trapping material buried in the first superconductor layer, wherein the trapping material is formulated to trap quasiparticles.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: November 29, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Baleegh Abdo, Sarunya Bangsaruntip
  • Publication number: 20220360240
    Abstract: A bandpass parametric amplifier circuit includes a plurality of unit cells. At least one unit cell includes a first inductor having a first node coupled to a center conductor and a second node coupled to ground. There is a first capacitor having a first node coupled to the center conductor and a second node coupled to ground. There is a second inductor having a first node coupled to the center conductor. A second capacitor has a first node coupled to a second node of the second inductor. The second capacitor and the second inductor are in series with the center conductor.
    Type: Application
    Filed: July 5, 2022
    Publication date: November 10, 2022
    Inventor: Baleegh Abdo
  • Patent number: 11418162
    Abstract: A bandpass parametric amplifier circuit includes a plurality of unit cells. At least one unit cell includes a first inductor having a first node coupled to a center conductor and a second node coupled to ground. There is a first capacitor having a first node coupled to the center conductor and a second node coupled to ground. There is a second inductor having a first node coupled to the center conductor. A second capacitor has a first node coupled to a second node of the second inductor. The second capacitor and the second inductor are in series with the center conductor.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: August 16, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Patent number: 11403168
    Abstract: A method of detecting parity of weak magnetic fields includes inputting a first electromagnetic pump drive to a first three-wave mixing Josephson device via a first 90 deg. hybrid; inputting a second electromagnetic pump drive to a second three-wave mixing Josephson device through the first 90 deg. hybrid; and inputting a first electromagnetic wave via a second 90 deg. hybrid connected to the first three-wave mixing Josephson device to output a second electromagnetic wave through the second three-wave mixing Josephson device. The method includes transmitting a third electromagnetic wave via the second 90 deg. hybrid to a third 90 deg. hybrid; and detecting a parity of a first magnet field applied by a first magnetic source and a second magnetic field applied by a second magnetic source based on constructive wave interference or destructive wave interference of the second electromagnetic wave and the third electromagnetic wave.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: August 2, 2022
    Assignee: International Business Machines Corporation
    Inventor: Baleegh Abdo
  • Publication number: 20220232710
    Abstract: Fabrication of superconducting devices that combine or separate direct currents and microwave signals is provided. A method can comprise forming a direct current circuit that supports a direct current, a microwave circuit that supports a microwave signal, and a common circuit that supports the direct current and the microwave signal. The method can also comprise operatively coupling a first end of the direct current circuit and a first end of the microwave circuit to a first end of the common circuit. The direct current circuit can comprise a bandstop circuit and the microwave circuit can comprise a capacitor. Alternatively, the direct current circuit can comprise a bandstop circuit and the microwave circuit can comprise a bandpass circuit. Alternatively, the microwave circuit can comprise a capacitor and the direct current circuit can comprise one or more quarter-wavelength transmission lines.
    Type: Application
    Filed: April 7, 2022
    Publication date: July 21, 2022
    Inventors: Baleegh Abdo, Markus Brink
  • Patent number: 11374537
    Abstract: A technique relates to a pulse shaping of microwave signals. A nondegenerate mixing device receives signals and a time-varying magnetic flux via input ports. The nondegenerate mixing device uses the signals and the time-varying magnetic flux to generate an output signal on an output port, the output signal having a waveform profile set by the time-varying magnetic flux.
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: June 28, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Patent number: 11367012
    Abstract: A tunable resonator is formed by shunting a set of asymmetric DC-SQUIDs with a capacitive device. An asymmetric DC-SQUID includes a first Josephson junction and a second Josephson junction, where the critical currents of the first and second Josephson junctions are different. A coupling is formed between the tunable resonator and a qubit such that the capacitively-shunted asymmetric DC-SQUIDs can dispersively read a quantum state of the qubit. An external magnetic flux is set to a first value and applied to the tunable resonator. A first value of the external magnetic flux causes the tunable resonator to tune to a first frequency within a first frequency difference from a resonance frequency of the qubit, the tunable resonator tuning to the first frequency causes active reset of the qubit.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: June 21, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Patent number: 11317519
    Abstract: Fabrication of superconducting devices that combine or separate direct currents and microwave signals is provided. A method can comprise forming a direct current circuit that supports a direct current, a microwave circuit that supports a microwave signal, and a common circuit that supports the direct current and the microwave signal. The method can also comprise operatively coupling a first end of the direct current circuit and a first end of the microwave circuit to a first end of the common circuit. The direct current circuit can comprise a bandstop circuit and the microwave circuit can comprise a capacitor. Alternatively, the direct current circuit can comprise a bandstop circuit and the microwave circuit can comprise a bandpass circuit. Alternatively, the microwave circuit can comprise a capacitor and the direct current circuit can comprise one or more quarter-wavelength transmission lines.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: April 26, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Baleegh Abdo, Markus Brink
  • Patent number: 11264554
    Abstract: High-saturation power Josephson ring modulators and fabrication of the same are provided. A Josephson ring modulator can comprise a plurality of matrix junctions. Matrix junctions of the plurality of matrix junctions can comprise respective superconducting parallel branches that can comprise a plurality of Josephson junctions operatively coupled in a series configuration. A method can comprise forming a first matrix junction comprising arranging a first group of Josephson junctions as first parallel branches. The method can also comprise forming a second matrix junction comprising arranging a second group of Josephson junctions as second parallel branches. Further, the method can comprise forming a third matrix junction comprising arranging a third group of Josephson junctions as third parallel branches. In addition, the method can comprise forming a fourth matrix junction comprising arranging a fourth group of Josephson junctions as fourth parallel branches.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: March 1, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Publication number: 20220020912
    Abstract: High-saturation power Josephson ring modulators and fabrication of the same are provided. A Josephson ring modulator can comprise a plurality of matrix junctions. Matrix junctions of the plurality of matrix junctions can comprise respective superconducting parallel branches that can comprise a plurality of Josephson junctions operatively coupled in a series configuration. A method can comprise forming a first matrix junction comprising arranging a first group of Josephson junctions as first parallel branches. The method can also comprise forming a second matrix junction comprising arranging a second group of Josephson junctions as second parallel branches. Further, the method can comprise forming a third matrix junction comprising arranging a third group of Josephson junctions as third parallel branches. In addition, the method can comprise forming a fourth matrix junction comprising arranging a fourth group of Josephson junctions as fourth parallel branches.
    Type: Application
    Filed: September 29, 2021
    Publication date: January 20, 2022
    Inventor: Baleegh Abdo
  • Patent number: 11201274
    Abstract: A quantum-mechanical photon-pair generator includes first, second, third, and fourth Josephson junctions electrically connected in a bridge circuit having first, second and third resonance eigenmodes, and a source of magnetic flux configured to provide, during operation, a magnetic flux through the bridge circuit to cause coupling between the first, second and third resonance eigenmodes when the third resonance eigenmode is excited. The photon-pair generator further includes first, second and third electromagnetic resonators having eigenmodes in resonance with the first, second and third resonance eigenmodes of the bridge circuit, respectively. The third frequency of the third resonance eigenmode is equal to a sum of a first frequency of the first resonance eigenmode plus a second frequency of the second resonance eigenmode such that, during operation, a photon having the third frequency is split into two quantum-mechanically entangled photons having the first and second frequencies, respectively.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: December 14, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo