Patents by Inventor David John Worrall

David John Worrall 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).

  • Amplifying, generating, or certifying randomness
    Patent number: 11334322
    Abstract: A security test logic system can include a non-transitory memory configured to store measurements from a measurement apparatus, the measurement outputs comprising indications of presence or absence of coincidences where particles are detected at more than one detector at substantially the same time, the detectors being at the end of different channels from a particle source and having substantially the same length. The system can include a processor configured to compute a test statistic from the stored measurements. The test statistic may express a Bell inequality, and the system can compare the test statistic with a threshold. The processor can be configured to generate and output a certificate certifying that the measurements are from a quantum system if the value of the computed test statistic passes the threshold.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: May 17, 2022
    Assignee: Cambridge Quantum Computing Limited
    Inventors: Fernando Guadalupe dos Santos Lins Brandão, David John Worrall, Simone Severini
  • Amplifying, generating, or certifying randomness
    Patent number: 11256477
    Abstract: A security test logic system can include a non-transitory memory configured to store measurements from a measurement apparatus, the measurement outputs comprising indications of presence or absence of coincidences where particles are detected at more than one detector at substantially the same time, the detectors being at the end of different channels from a particle source and having substantially the same length. The system can include a processor configured to compute a test statistic from the stored measurements. The test statistic may express a Bell inequality, and the system can compare the test statistic with a threshold. The processor can be configured to generate and output a certificate certifying that the measurements are from a quantum system if the value of the computed test statistic passes the threshold.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: February 22, 2022
    Assignee: Cambridge Quantum Computing Limited
    Inventors: Fernando Guadalupe dos Santos Lins Brandão, David John Worrall, Simone Severini
  • AMPLIFYING, GENERATING, OR CERTIFYING RANDOMNESS
    Publication number: 20210326119
    Abstract: A security test logic system can include a non-transitory memory configured to store measurements from a measurement apparatus, the measurement outputs comprising indications of presence or absence of coincidences where particles are detected at more than one detector at substantially the same time, the detectors being at the end of different channels from a particle source and having substantially the same length. The system can include a processor configured to compute a test statistic from the stored measurements. The test statistic may express a Bell inequality, and the system can compare the test statistic with a threshold. The processor can be configured to generate and output a certificate certifying that the measurements are from a quantum system if the value of the computed test statistic passes the threshold.
    Type: Application
    Filed: June 28, 2021
    Publication date: October 21, 2021
    Inventors: Fernando Guadalupe dos Santos Lins Brandão, David John Worrall, Simone Severini
  • AMPLIFYING, GENERATING, OR CERTIFYING RANDOMNESS
    Publication number: 20210326120
    Abstract: A security test logic system can include a non-transitory memory configured to store measurements from a measurement apparatus, the measurement outputs comprising indications of presence or absence of coincidences where particles are detected at more than one detector at substantially the same time, the detectors being at the end of different channels from a particle source and having substantially the same length. The system can include a processor configured to compute a test statistic from the stored measurements. The test statistic may express a Bell inequality, and the system can compare the test statistic with a threshold. The processor can be configured to generate and output a certificate certifying that the measurements are from a quantum system if the value of the computed test statistic passes the threshold.
    Type: Application
    Filed: June 28, 2021
    Publication date: October 21, 2021
    Inventors: Fernando Guadalupe dos Santos Lins Brandão, David John Worrall, Simone Severini
  • Amplifying, generating, or certifying randomness
    Patent number: 11080021
    Abstract: A security test logic system can include a non-transitory memory configured to store measurements from a measurement apparatus, the measurement outputs comprising indications of presence or absence of coincidences where particles are detected at more than one detector at substantially the same time, the detectors being at the end of different channels from a particle source and having substantially the same length. The system can include a processor configured to compute a test statistic from the stored measurements. The test statistic may express a Bell inequality, and the system can compare the test statistic with a threshold. The processor can be configured to generate and output a certificate certifying that the measurements are from a quantum system if the value of the computed test statistic passes the threshold.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: August 3, 2021
    Assignee: Cambridge Quantum Computing Limited
    Inventors: Fernando Guadalupe dos Santos Lins Brandão, David John Worrall, Simone Severini
  • AMPLIFYING, GENERATING, OR CERTIFYING RANDOMNESS
    Publication number: 20190250889
    Abstract: A security test logic system can include a non-transitory memory configured to store measurements from a measurement apparatus, the measurement outputs comprising indications of presence or absence of coincidences where particles are detected at more than one detector at substantially the same time, the detectors being at the end of different channels from a particle source and having substantially the same length. The system can include a processor configured to compute a test statistic from the stored measurements. The test statistic may express a Bell inequality, and the system can compare the test statistic with a threshold. The processor can be configured to generate and output a certificate certifying that the measurements are from a quantum system if the value of the computed test statistic passes the threshold.
    Type: Application
    Filed: November 30, 2018
    Publication date: August 15, 2019
    Inventors: Fernando Guadalupe dos Santos Lins Brandão, David John Worrall