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: 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
  • Patent number: 11183989
    Abstract: A system resets leakage states of a superconducting qubit to a qubit subspace by using a dedicated electrical circuit on a timescale faster than a natural decay process. One system comprises a qubit including a qubit transition frequency and multiple qubit leakage transition frequencies; and a filter circuit coupled to the qubit for leakage mitigation based on the qubit frequency and the multiple qubit leakage transition frequencies, wherein the filter circuit causes dissipation at the leakage transition frequencies while isolating the qubit transition frequency. Another system comprises a qubit including a qubit transition frequency and multiple qubit leakage transition frequencies; and a tunable dissipative cavity circuit coupled to the qubit for leakage mitigation based on the qubit frequency and the multiple qubit leakage transition frequencies, wherein the tunable dissipative cavity circuit causes the leakage transition frequencies to dissipate while isolating the qubit transition frequency.
    Type: Grant
    Filed: October 6, 2020
    Date of Patent: November 23, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ted Thorbeck, Baleegh Abdo
  • Patent number: 11177428
    Abstract: A flux-biasing device includes a set of magnetic flux generating members. A first magnetic flux generating member is configured to magnetically interact with a first qubit from a set of qubits of a quantum processor such that a first magnetic flux of the first member causes a first change in a first resonance frequency of the first qubit by a first frequency shift value. Each non-corresponding magnetic flux generating member of the set is well separated from qubits corresponding to other magnetic flux generating members of the set such that qubits corresponding to other members exhibit less than a threshold value of resonance frequency shift as a result of a magnetic flux of a non-corresponding member.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: November 16, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Oblesh Jinka, Baleegh Abdo
  • Patent number: 11178771
    Abstract: An aspect includes one or more board layers. A first chip cavity is formed within the one or more board layers, wherein a first Josephson amplifier or Josephson mixer is disposed within the first chip cavity. The first Josephson amplifier or Josephson mixer comprises at least one port, each port connected to at least one connector disposed on at least one of the one or more board layers, wherein at least one of the one or more board layers comprises a circuit trace formed on the at least one of the one or more board layers.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: November 16, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Baleegh Abdo, Nicholas T. Bronn, Oblesh Jinka, Salvatore B. Olivadese
  • Patent number: 11164101
    Abstract: A resistive component in a hybrid microwave attenuator circuit is configured to attenuate a plurality of frequencies in an input signal. The hybrid microwave attenuator circuit is further configured with a dispersive component to attenuate a second plurality of frequencies within a frequency range by reflecting off portions of the input signal at those frequencies that are within the frequency range. The resistive component and the dispersive component are arranged in a series configuration relative to one another in the hybrid microwave attenuator circuit.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: November 2, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Patent number: 11139903
    Abstract: A technique relates to a superconducting microwave combiner. A first filter through a last filter connects to a first input through a last input, respectively. The first filter through the last filter each has a first passband through a last passband, respectively, such that the first passband through the last passband are each different. A common output is connected to the first input through the last input via the first filter through the last filter.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: October 5, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Patent number: 11139424
    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: October 22, 2018
    Date of Patent: October 5, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Baleegh Abdo
  • Publication number: 20210297056
    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: Application
    Filed: April 7, 2021
    Publication date: September 23, 2021
    Inventor: Baleegh Abdo
  • Publication number: 20210288611
    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: Application
    Filed: January 25, 2021
    Publication date: September 16, 2021
    Inventor: Baleegh Abdo
  • Publication number: 20210280766
    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: Application
    Filed: December 27, 2019
    Publication date: September 9, 2021
    Inventors: Baleegh Abdo, Sarunya Bangsaruntip
  • Publication number: 20210271545
    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: Application
    Filed: February 28, 2020
    Publication date: September 2, 2021
    Inventor: BALEEGH ABDO
  • Publication number: 20210234084
    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: Application
    Filed: December 5, 2019
    Publication date: July 29, 2021
    Inventor: BALEEGH ABDO