Patents by Inventor Chad T. Rigetti

Chad T. Rigetti 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: 10352992
    Abstract: A quantum error-correction technique includes applying a first set of two-qubit gates to qubits in a lattice cell, and applying a second, different set of two-qubit gates to the qubits in the lattice cell. The qubits in the lattice cell include data qubits and ancilla qubits, and the ancilla qubits reside between respective nearest-neighbor pairs of the data qubits. After the first and second sets of two-qubit gates have been applied, measurement outcomes of the ancilla qubits are obtained, and the parity of the measurement outcomes is determined.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: July 16, 2019
    Assignee: Rigetti & Co, Inc.
    Inventors: William J. Zeng, Eyob A. Sete, Chad T. Rigetti
  • Patent number: 10140404
    Abstract: In a general aspect, a quantum information processing circuit is analyzed. In some implementations, a linear response function of a quantum information processing circuit is generated. A linear circuit model is generated based on the linear response function. A composite circuit model is generated by combining the linear circuit model and a nonlinear circuit model. An operating parameter of the quantum information processing circuit is computed by solving the composite circuit model. In some implementations, an electromagnetic structure solver determines the linear response function based on a circuit specification, a quantum circuit analysis tool calculates the operating parameters, and the circuit specification is modified based on the operating parameters.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: November 27, 2018
    Assignee: Rigetti & Co, Inc.
    Inventors: Chad T. Rigetti, Eyob A. Sete
  • Patent number: 10068181
    Abstract: A quantum computing system that includes a quantum circuit device having at least one operating frequency; a first substrate having a first surface on which the quantum circuit device is disposed; a second substrate having a first surface that defines a recess of the second substrate, the first and second substrates being arranged such that the recess of the second substrate forms an enclosure that houses the quantum circuit device; and an electrically conducting layer that covers at least a portion of the recess of the second substrate.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: September 4, 2018
    Assignee: Rigetti & Co, Inc.
    Inventors: Chad T. Rigetti, Mehmoosh Vahidpour, Dane Christoffer Thompson, Alexei N. Marchenokov, Eyob Alebachew Sete, Jean-Luc Fran├žois-Xavier Orgiazzi
  • Publication number: 20180232653
    Abstract: In a general aspect, a microwave quantum circuit includes an on-chip impedance matching circuit. In some cases, a microwave quantum circuit includes a dielectric substrate, a quantum circuit device on the substrate, and an impedance matching circuit device on the substrate. The quantum circuit device includes a Josephson junction, and the impedance matching circuit device is coupled to the quantum circuit device on the substrate.
    Type: Application
    Filed: December 13, 2016
    Publication date: August 16, 2018
    Applicant: RIGETTI & CO., INC.
    Inventors: Michael Karunendra Selvanayagam, Chad T. Rigetti, Eyob A. Sete, Matthew J. Reagor
  • Patent number: 10050630
    Abstract: In a general aspect, a qubit device includes two circuit loops. In some aspects, a first circuit loop includes a first Josephson junction, a second circuit loop includes a second Josephson junction, and the first and second loops are configured to receive a magnetic flux that defines a transition frequency of a qubit device. In some aspects, a quantum integrated circuit includes an inductor connected between a first circuit node and a second circuit node; the first Josephson junction connected in parallel with the inductor between the first circuit node and the second circuit node; and the second Josephson junction connected in parallel with the inductor between the first circuit node and the second circuit node.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: August 14, 2018
    Assignee: Rigetti & Co, Inc.
    Inventors: Matthew J. Reagor, Eyob A. Sete, Chad T. Rigetti
  • Patent number: 10008655
    Abstract: A qubit system includes a substrate layer, a qubit circuit suspended above the substrate layer and fine structure disposed between the qubit circuit and the substrate layer.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: June 26, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Josephine B. Chang, George A Keefe, Chad T. Rigetti, Mary E. Rothwell
  • Patent number: 9971970
    Abstract: A quantum computing system includes a quantum circuit device, a substrate having a first surface on which the quantum processing device is disposed, and one or more vias each extending through the substrate. The vias include a material that is a superconducting material during operation of the quantum computing system.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: May 15, 2018
    Assignee: Rigetti & Co, Inc.
    Inventors: Chad T. Rigetti, Mehrnoosh Vahidpour, Dane Christoffer Thompson, Alexei N. Marchenokov, Eyob Alebachew Sete, Matthew J. Reagor
  • Publication number: 20180054201
    Abstract: In a general aspect, a qubit device includes two circuit loops. In some aspects, a first circuit loop includes a first Josephson junction, a second circuit loop includes a second Josephson junction, and the first and second loops are configured to receive a magnetic flux that defines a transition frequency of a qubit device. In some aspects, a quantum integrated circuit includes an inductor connected between a first circuit node and a second circuit node; the first Josephson junction connected in parallel with the inductor between the first circuit node and the second circuit node; and the second Josephson junction connected in parallel with the inductor between the first circuit node and the second circuit node.
    Type: Application
    Filed: August 19, 2016
    Publication date: February 22, 2018
    Applicant: RIGETTI & CO., INC.
    Inventors: Matthew J. Reagor, Eyob A. Sete, Chad T. Rigetti
  • Publication number: 20170228483
    Abstract: In a general aspect, a quantum information processing circuit is analyzed. In some implementations, a linear response function of a quantum information processing circuit is generated. A linear circuit model is generated based on the linear response function. A composite circuit model is generated by combining the linear circuit model and a nonlinear circuit model. An operating parameter of the quantum information processing circuit is computed by solving the composite circuit model. In some implementations, an electromagnetic structure solver determines the linear response function based on a circuit specification, a quantum circuit analysis tool calculates the operating parameters, and the circuit specification is modified based on the operating parameters.
    Type: Application
    Filed: November 6, 2015
    Publication date: August 10, 2017
    Applicant: RIGETTI & CO., INC.
    Inventors: Chad T. Rigetti, Eyob A. Sete
  • Patent number: 9716219
    Abstract: A qubit system includes a substrate layer, a qubit circuit suspended above the substrate layer and fine structure disposed between the qubit circuit and the substrate layer.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: July 25, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Josephine B. Chang, George A. Keefe, Chad T. Rigetti, Mary E. Rothwell
  • Patent number: 9432024
    Abstract: A device includes a housing, at least two qubits disposed in the housing and a resonator disposed in the housing and coupled to the at least two qubits, wherein the at least two qubits are maintained at a fixed frequency and are statically coupled to one another via the resonator, wherein energy levels |03> and |12> are closely aligned, wherein a tuned microwave signal applied to the qubit activates a two-qubit phase interaction.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: August 30, 2016
    Assignee: International Business Machines Corporation
    Inventors: Jerry M. Chow, Jay M. Gambetta, Seth T. Merkel, Chad T. Rigetti, Matthias Steffen
  • Patent number: 9385294
    Abstract: A mechanism relates to a superconducting quantum system. A diamond substrate layer is included. A superconducting quantum device is disposed on the diamond substrate layer. The superconducting quantum device includes a superconducting quantum circuit formed on top a surface of the diamond substrate layer.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: July 5, 2016
    Assignees: INTERNATIONAL BUSINESS MACHINES CORPORATION, BROOKLYN QUANTUM WORKS
    Inventors: Chad T. Rigetti, Lafe Spietz
  • Patent number: 9379303
    Abstract: A quantum information processing system includes a first composite quantum system, a second composite quantum system, a plurality of electromagnetic field sources coupled to the system and an adjustable electromagnetic coupling between the first composite quantum system and the second composite quantum system.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: June 28, 2016
    Assignee: GLOCBALFOUNDRIES INC.
    Inventors: Jay M. Gambetta, Mark B. Ketchen, Chad T. Rigetti, Matthias Steffen
  • Publication number: 20160093790
    Abstract: A mechanism relates to a superconducting quantum system. A diamond substrate layer is included. A superconducting quantum device is disposed on the diamond substrate layer. The superconducting quantum device includes a superconducting quantum circuit formed on top a surface of the diamond substrate layer.
    Type: Application
    Filed: September 26, 2014
    Publication date: March 31, 2016
    Inventors: Chad T. Rigetti, Lafe Spietz
  • Publication number: 20150340584
    Abstract: A qubit system includes a substrate layer, a qubit circuit suspended above the substrate layer and fine structure disposed between the qubit circuit and the substrate layer.
    Type: Application
    Filed: July 29, 2015
    Publication date: November 26, 2015
    Inventors: Josephine B. Chang, George A. Keefe, Chad T. Rigetti, Mary E. Rothwell
  • Patent number: 9177814
    Abstract: A qubit system includes a substrate layer, a qubit circuit suspended above the substrate layer and fine structure disposed between the qubit circuit and the substrate layer.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 3, 2015
    Assignee: International Business Machines Corporation
    Inventors: Josephine B. Chang, George A. Keefe, Chad T. Rigetti, Mary E. Rothwell
  • Publication number: 20150311422
    Abstract: A qubit system includes a substrate layer, a qubit circuit suspended above the substrate layer and fine structure disposed between the qubit circuit and the substrate layer.
    Type: Application
    Filed: August 19, 2013
    Publication date: October 29, 2015
    Applicant: International Business Machines Corporation
    Inventors: Josephine B. Chang, George A. Keefe, Chad T. Rigetti, Mary E. Rothwell
  • Patent number: 9059707
    Abstract: A quantum information processing system includes a waveguide having an aperture, a non-linear quantum circuit disposed in the waveguide and an electromagnetic control signal source coupled to the aperture.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: June 16, 2015
    Assignee: International Business Machines Corporation
    Inventors: Jay M. Gambetta, Chad T. Rigetti
  • Patent number: 9041427
    Abstract: A quantum information processing system includes a waveguide having an aperture, a non-linear quantum circuit disposed in the waveguide and an electromagnetic control signal source coupled to the aperture.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: May 26, 2015
    Assignee: International Business Machines Corporation
    Inventors: Jay M. Gambetta, Chad T. Rigetti
  • Publication number: 20140368234
    Abstract: A device includes a housing, at least two qubits disposed in the housing and a resonator disposed in the housing and coupled to the at least two qubits, wherein the at least two qubits are maintained at a fixed frequency and are statically coupled to one another via the resonator, wherein energy levels |03> and |12> are closely aligned, wherein a tuned microwave signal applied to the qubit activates a two-qubit phase interaction.
    Type: Application
    Filed: September 2, 2014
    Publication date: December 18, 2014
    Inventors: Jerry M. Chow, Jay M. Gambetta, Seth T. Merkel, Chad T. Rigetti, Matthias Steffen