Patents by Inventor David Alexander AASEN

David Alexander AASEN 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: 12217131
    Abstract: A computing system including a quantum computing device. The quantum computing device includes a Majorana island, a quantum dot (QD), an electrical ground, and a capacitance sensor. The computing system further includes a controller configured to, in each of a plurality of sampling iterations, control the quantum computing device to electrically couple the Majorana island to the electrical ground, disconnect the Majorana island from the electrical ground, electrically couple the Majorana island to the QD, scan over values of a first plunger gate voltage applied to a first plunger gate and a second plunger gate voltage applied to a second plunger gate, and output quantum capacitance measurements. The controller is further configured to receive the quantum capacitance measurements and determine a measured distribution of resonance regions associated with the sampling iterations.
    Type: Grant
    Filed: June 15, 2023
    Date of Patent: February 4, 2025
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Parsa Bonderson, David Alexander Aasen, Christina Paulsen Knapp, Roman Bela Bauer
  • Publication number: 20240419999
    Abstract: A computing system including a quantum computing device. The quantum computing device includes a Majorana island, a quantum dot (QD), an electrical ground, and a capacitance sensor. The computing system further includes a controller configured to, in each of a plurality of sampling iterations, control the quantum computing device to electrically couple the Majorana island to the electrical ground, disconnect the Majorana island from the electrical ground, electrically couple the Majorana island to the QD, scan over values of a first plunger gate voltage applied to a first plunger gate and a second plunger gate voltage applied to a second plunger gate, and output quantum capacitance measurements. The controller is further configured to receive the quantum capacitance measurements and determine a measured distribution of resonance regions associated with the sampling iterations.
    Type: Application
    Filed: June 15, 2023
    Publication date: December 19, 2024
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Parsa BONDERSON, David Alexander AASEN, Christina Paulsen KNAPP, Roman Bela BAUER
  • Publication number: 20240415028
    Abstract: A computing system is presented. The computing system comprises a Majorana island at which a plurality of Majorana zero modes are instantiated, and a grounded region tunably coupled to one of the Majorana zero modes. The grounded region comprises at least a two-dimensional electron gas (2DEG) layer. A first dielectric layer is adjacent to the 2DEG layer. A grounded gate directly contacts the 2DEG layer through a via fill.
    Type: Application
    Filed: June 9, 2023
    Publication date: December 12, 2024
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Parsa BONDERSON, Christina Paulsen KNAPP, Roman Bela BAUER, Emily Anne TOOMEY, David Alexander AASEN
  • Publication number: 20240412092
    Abstract: Aspects of the disclosure include removing a faulty qubit in a quantum circuit. The faulty qubit is determined to be in the quantum circuit, the faulty qubit being associated with a plaquette having other qubits, where adjacent plaquettes are neighboring the plaquette. A route is determined to isolate the plaquette from the adjacent plaquettes. Measurements are caused to be performed on the quantum circuit for the route that isolates the plaquette having the faulty qubit and the other qubits.
    Type: Application
    Filed: June 9, 2023
    Publication date: December 12, 2024
    Inventors: Matthew Benjamin HASTINGS, Parsa BONDERSON, Zhenghan WANG, Jeongwan HAAH, David Alexander AASEN
  • Publication number: 20240378481
    Abstract: A computing system including a quantum computing device that includes Majorana islands at which Majorana zero modes (MZMs) are instantiated. The computing system further includes a controller configured to control the quantum computing device to perform a joint parity measurement at two or more MZMs. The controller is further configured to control the quantum computing device to perform quasiparticle poisoning (QPP) detection at the one or more Majorana islands to thereby generate error data. The error data includes one or more QPP indications associated with the one or more Majorana islands. The controller is further configured to receive the error data from the quantum computing device. The controller is further configured to update an accumulated error state of the one or more Majorana islands based at least in part on the error data, and to perform an update operation based at least in part on the accumulated error state.
    Type: Application
    Filed: May 5, 2023
    Publication date: November 14, 2024
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Parsa BONDERSON, David Alexander AASEN, Christina Paulsen KNAPP
  • Publication number: 20240378477
    Abstract: A computing system including a quantum computing device. The quantum computing device includes Majorana islands, quantum dots, and capacitance sensors. The computing system further includes a controller configured to, for an island-dot system including one or more Majorana islands and one or more quantum dots, control the quantum computing device to perform a joint parity measurement of two or more MZMs. Performing the joint parity measurement includes, at each of a plurality of candidate resonance regions corresponding to values of a change in a fermion number, setting Majorana island gate voltages and quantum dot gate voltages to respective candidate resonance values. The joint parity measurement further includes, at each of the candidate resonance regions, via a capacitance sensor, detecting a microwave response signal measured at the island-dot system. The joint parity measurement further includes outputting a joint parity value based at least in part on the microwave response signal.
    Type: Application
    Filed: May 5, 2023
    Publication date: November 14, 2024
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Parsa BONDERSON, David Alexander AASEN, Christina Paulsen KNAPP
  • Publication number: 20240354629
    Abstract: A method and apparatus for performing quantum error correction using an automorphism code related to the honeycomb code. The automorphism code is based on Kramers-Wannier (KW) duality. For embodiments on a hexagonal lattice using three repeated time steps, ? of the pixels are active in a given time steps. In a given time step r, a KW circuit is applied to plaquettes labeled r mod 3, transferring quantum information from the active qubits at the beginning to a new set of active qubits at the end of the time step. Each of the three plaquette types is associated with one stabilizer either given by a product of six Z operators or three X operators. The KW circuit maps the product of X operators to the product of Z operators and vice-versa. The stabilizer group of the superlattice toric code changes every round.
    Type: Application
    Filed: November 18, 2022
    Publication date: October 24, 2024
    Inventors: Matthew Benjamin HASTINGS, Zhenghan WANG, David Alexander AASEN
  • Publication number: 20240249174
    Abstract: A computing system including a quantum computing device. The quantum computing device includes a Majorana island at which Majorana zero modes (MZMs) are instantiated. The quantum computing device further includes a quantum dot electrically connectable to an MZM, a capacitance sensor capacitively coupled to the quantum dot, and a controller. The controller is configured to set a Majorana island gate voltage of the Majorana island and a quantum dot gate voltage of the quantum dot to a candidate resonance Majorana island voltage and a candidate resonance quantum dot voltage. The controller is further configured to receive a capacitance measurement of the quantum dot and the Majorana island and determine whether resonance occurs based on the capacitance measurement. The controller is further configured to reset the gate voltages. The controller is further configured to output a quasiparticle poisoning value indicated by the one or more determinations of whether resonance occurs.
    Type: Application
    Filed: January 25, 2023
    Publication date: July 25, 2024
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Parsa BONDERSON, David Alexander AASEN, Roman Bela BAUER, Christina Paulsen KNAPP
  • Publication number: 20240119331
    Abstract: Physical layouts of Majorana-based qubits for implementations of pentagonal tilings are described. An example quantum device comprises a set of tetrons for enabling Majorana-based qubits. The set of tetrons is arranged in a lattice to allow pentagonal tilings associated with the set of tetrons. The vertices of the pentagonal tilings relate to the qubits and single qubit operations, and the edges of the pentagonal tilings (connecting different vertices) relate to 2-qubit operations acting on a pair of qubits connected by a given edge. As an example, the 1-qubit Pauli measurements relate to the operations performed on the vertices associated with the pentagonal tilings and the 2-qubit measurements relate to the operations performed along the edges of the pentagonal tilings.
    Type: Application
    Filed: August 26, 2022
    Publication date: April 11, 2024
    Inventors: Parsa BONDERSON, David Alexander AASEN, Christina Paulsen KNAPP