Patents by Inventor Shantanu Mundhada

Shantanu Mundhada 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).

  • Josephson nonlinear circuit
    Patent number: 11791818
    Abstract: Parametrically pumped four-wave mixing is a key building block for many developments in the field of superconducting quantum information processing. However, undesired frequency shifts such as Kerr, cross-Ken and Stark shifts inherent with four-wave mixing, lead to difficulties in tuning up the desired parametric processes and, for certain applications, severely limit the fidelities of the resulting operations. Some embodiments include a Josephson four-wave mixing device consisting of a SQUID transmon coupled to a half-flux biased SNAIL transmon, a.k.a. capacitively shunted flux qubit. When the two transmon have matching frequencies, an interference effect cancels the negative Kerr of the SQUID transmon with the positive Kerr of the SNAIL transmon while preserving parametric four-wave mixing capabilities.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: October 17, 2023
    Assignee: Yale University
    Inventors: Shantanu Mundhada, Nicholas Frattini, Shruti Puri, Shyam Shankar, Steven M. Girvin, Michel Devoret
  • Techniques for error correction of a logical qubit and related systems and methods
    Patent number: 11782779
    Abstract: Techniques for quantum error correction of a multi-level system are provided and described. In some aspects, techniques for encoding a state of a multi-level quantum system include encoding a quantum information in a two-mode state of two quantum mechanical oscillators. Techniques for protecting the two-mode state against dephasing and energy loss are described.
    Type: Grant
    Filed: January 5, 2019
    Date of Patent: October 10, 2023
    Assignee: Yale University
    Inventors: Victor V. Albert, Shantanu Mundhada, Alexander Grimm, Steven Touzard, Michel Devoret, Liang Jiang
  • JOSEPHSON NONLINEAR CIRCUIT
    Publication number: 20220103172
    Abstract: Parametrically pumped four-wave mixing is a key building block for many developments in the field of superconducting quantum information processing. However, undesired frequency shifts such as Kerr, cross-Ken and Stark shifts inherent with four-wave mixing, lead to difficulties in tuning up the desired parametric processes and, for certain applications, severely limit the fidelities of the resulting operations. Some embodiments include a Josephson four-wave mixing device consisting of a SQUID transmon coupled to a half-flux biased SNAIL transmon, a.k.a. capacitively shunted flux qubit. When the two transmon have matching frequencies, an interference effect cancels the negative Kerr of the SQUID transmon with the positive Kerr of the SNAIL transmon while preserving parametric four-wave mixing capabilities.
    Type: Application
    Filed: January 15, 2020
    Publication date: March 31, 2022
    Applicant: Yale University
    Inventors: Shantanu Mundhada, Nicholas Frattini, Shruti Puri, Shyam Shankar, Steven M. Girvin, Michel Devoret
  • TECHNIQUES FOR ERROR CORRECTION OF A LOGICAL QUBIT AND RELATED SYSTEMS AND METHODS
    Publication number: 20200334101
    Abstract: Techniques for quantum error correction of a multi-level system are provided and described. In some aspects, techniques for encoding a state of a multi-level quantum system include encoding a quantum information in a two-mode state of two quantum mechanical oscillators. Techniques for protecting the two-mode state against dephasing and energy loss are described.
    Type: Application
    Filed: January 5, 2019
    Publication date: October 22, 2020
    Applicant: Yale University
    Inventors: Victor V. Albert, Shantanu Mundhada, Alexander Grimm, Steven Touzard, Michel Devoret, Liang Jiang