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).
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Patent number: 11940392Abstract: 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: GrantFiled: April 18, 2019Date of Patent: March 26, 2024Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Baleegh Abdo
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Patent number: 11888471Abstract: 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: GrantFiled: December 27, 2021Date of Patent: January 30, 2024Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Corrado P Mancini, Baleegh Abdo
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Patent number: 11758828Abstract: 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: GrantFiled: September 29, 2021Date of Patent: September 12, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Baleegh Abdo
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Patent number: 11728772Abstract: 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: GrantFiled: April 7, 2021Date of Patent: August 15, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Baleegh Abdo
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Publication number: 20230225224Abstract: 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: ApplicationFiled: November 15, 2022Publication date: July 13, 2023Inventor: Baleegh ABDO
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Publication number: 20230208419Abstract: 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: ApplicationFiled: December 27, 2021Publication date: June 29, 2023Inventors: Corrado P. Mancini, BALEEGH ABDO
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Publication number: 20230155593Abstract: 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: ApplicationFiled: November 13, 2021Publication date: May 18, 2023Inventors: Baleegh Abdo, Jerry M. Chow
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Patent number: 11599819Abstract: 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: GrantFiled: February 18, 2020Date of Patent: March 7, 2023Assignee: International Business Machines CorporationInventor: Baleegh Abdo
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Patent number: 11552239Abstract: 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: GrantFiled: November 27, 2019Date of Patent: January 10, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Baleegh Abdo
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Patent number: 11515461Abstract: 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: GrantFiled: December 27, 2019Date of Patent: November 29, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Baleegh Abdo, Sarunya Bangsaruntip
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Publication number: 20220360240Abstract: 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: ApplicationFiled: July 5, 2022Publication date: November 10, 2022Inventor: Baleegh Abdo
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Patent number: 11418162Abstract: 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: GrantFiled: January 22, 2020Date of Patent: August 16, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Baleegh Abdo
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Patent number: 11403168Abstract: 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: GrantFiled: February 28, 2020Date of Patent: August 2, 2022Assignee: International Business Machines CorporationInventor: Baleegh Abdo
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Publication number: 20220232710Abstract: 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: ApplicationFiled: April 7, 2022Publication date: July 21, 2022Inventors: Baleegh Abdo, Markus Brink
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Patent number: 11374537Abstract: 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: GrantFiled: January 25, 2021Date of Patent: June 28, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Baleegh Abdo
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Patent number: 11367012Abstract: 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: GrantFiled: December 21, 2020Date of Patent: June 21, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Baleegh Abdo
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Patent number: 11317519Abstract: 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: GrantFiled: October 15, 2018Date of Patent: April 26, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Baleegh Abdo, Markus Brink
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Patent number: 11264554Abstract: 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: GrantFiled: December 28, 2020Date of Patent: March 1, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Baleegh Abdo
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Publication number: 20220020912Abstract: 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: ApplicationFiled: September 29, 2021Publication date: January 20, 2022Inventor: Baleegh Abdo
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Patent number: 11201274Abstract: 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: GrantFiled: December 5, 2019Date of Patent: December 14, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Baleegh Abdo