Patents by Inventor Chetan Nayak

Chetan Nayak 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: 11839167
    Abstract: Apparatus, methods, and systems are disclosed for robust scalable topological quantum computing. Quantum dots are fabricated as van der Waals heterostructures, supporting localized topological phases and non-Abelian anyons (quasiparticles). Large bandgaps provide noise immunity. Three-dot structures include an intermediate quantum dot between two computational quantum dots. With the intermediate quantum dot in an OFF state, quasiparticles at the computational quantum dots can be isolated, with long lifetimes. Alternatively, the intermediate quantum dot can be controlled to decrease the quasiparticle tunneling barrier, enabling fast computing operations. A computationally universal suite of operations includes quasiparticle initialization, braiding, fusion, and readout of fused quasiparticle states, with, optionally, transport or tunable interactions—all topologically protected. Robust qubits can be operated without error correction.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: December 5, 2023
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Parsa Bonderson, Chetan Nayak, David Reilly, Andrea Franchini Young, Michael Zaletel
  • Publication number: 20230309418
    Abstract: Various embodiments of a modular unit for a topologic qubit and of scalable quantum computing architectures using such modular units are disclosed herein. For example, one example embodiment is a modular unit for a topological qubit comprising 6 Majorana zero modes (MZMs) on a mesoscopic superconducting island. These units can provide the computational MZMs with protection from quasiparticle poisoning. Several possible realizations of these modular units are described herein. Also disclosed herein are example designs for scalable quantum computing architectures comprising the modular units together with gates and reference arms (e.g., quantum dots, Majorana wires, etc.) configured to enable joint parity measurements to be performed for various combinations of two or four MZMs associated with one or two modular units, as well as other operations on the states of MZMs.
    Type: Application
    Filed: May 5, 2023
    Publication date: September 28, 2023
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
  • Patent number: 11751493
    Abstract: Apparatus, methods, and systems are disclosed for robust scalable topological quantum computing. Quantum dots are fabricated as van der Waals heterostructures, supporting localized topological phases and non-Abelian anyons (quasiparticles). Large bandgaps provide noise immunity. Three-dot structures include an intermediate quantum dot between two computational quantum dots. With the intermediate quantum dot in an OFF state, quasiparticles at the computational quantum dots can be isolated, with long lifetimes. Alternatively, the intermediate quantum dot can be controlled to decrease the quasiparticle tunneling barrier, enabling fast computing operations. A computationally universal suite of operations includes quasiparticle initialization, braiding, fusion, and readout of fused quasiparticle states, with, optionally, transport or tunable interactions—all topologically protected. Robust qubits can be operated without error correction.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: September 5, 2023
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Parsa Bonderson, Chetan Nayak, David Reilly, Andrea Franchini Young, Michael Zaletel
  • Patent number: 11696516
    Abstract: Various embodiments of a modular unit for a topologic qubit and of scalable quantum computing architectures using such modular units are disclosed herein. For example, one example embodiment is a modular unit for a topological qubit comprising 6 Majorana zero modes (MZMs) on a mesoscopic superconducting island. These units can provide the computational MZMs with protection from quasiparticle poisoning. Several possible realizations of these modular units are described herein. Also disclosed herein are example designs for scalable quantum computing architectures comprising the modular units together with gates and reference arms (e.g., quantum dots, Majorana wires, etc.) configured to enable joint parity measurements to be performed for various combinations of two or four MZMs associated with one or two modular units, as well as other operations on the states of MZMs.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: July 4, 2023
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
  • Publication number: 20220069219
    Abstract: Apparatus, methods, and systems are disclosed for robust scalable topological quantum computing. Quantum dots are fabricated as van der Waals heterostructures, supporting localized topological phases and non-Abelian anyons (quasiparticles). Large bandgaps provide noise immunity. Three-dot structures include an intermediate quantum dot between two computational quantum dots. With the intermediate quantum dot in an OFF state, quasiparticles at the computational quantum dots can be isolated, with long lifetimes. Alternatively, the intermediate quantum dot can be controlled to decrease the quasiparticle tunneling barrier, enabling fast computing operations. A computationally universal suite of operations includes quasiparticle initialization, braiding, fusion, and readout of fused quasiparticle states, with, optionally, transport or tunable interactions—all topologically protected. Robust qubits can be operated without error correction.
    Type: Application
    Filed: December 28, 2020
    Publication date: March 3, 2022
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Parsa Bonderson, Chetan Nayak, David Reilly, Andrea Franchini Young, Michael Zaletel
  • Publication number: 20220067563
    Abstract: Apparatus, methods, and systems are disclosed for robust scalable topological quantum computing. Quantum dots are fabricated as van der Waals heterostructures, supporting localized topological phases and non-Abelian anyons (quasiparticles). Large bandgaps provide noise immunity. Three-dot structures include an intermediate quantum dot between two computational quantum dots. With the intermediate quantum dot in an OFF state, quasiparticles at the computational quantum dots can be isolated, with long lifetimes. Alternatively, the intermediate quantum dot can be controlled to decrease the quasiparticle tunneling barrier, enabling fast computing operations. A computationally universal suite of operations includes quasiparticle initialization, braiding, fusion, and readout of fused quasiparticle states, with, optionally, transport or tunable interactions—all topologically protected. Robust qubits can be operated without error correction.
    Type: Application
    Filed: December 28, 2020
    Publication date: March 3, 2022
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Parsa Bonderson, Chetan Nayak, David Reilly, Andrea Franchini Young, Michael Zaletel
  • Publication number: 20210005661
    Abstract: Various embodiments of a modular unit for a topologic qubit and of scalable quantum computing architectures using such modular units are disclosed herein. For example, one example embodiment is a modular unit for a topological qubit comprising 6 Majorana zero modes (MZMs) on a mesoscopic superconducting island. These units can provide the computational MZMs with protection from quasiparticle poisoning. Several possible realizations of these modular units are described herein. Also disclosed herein are example designs for scalable quantum computing architectures comprising the modular units together with gates and reference arms (e.g., quantum dots, Majorana wires, etc.) configured to enable joint parity measurements to be performed for various combinations of two or four MZMs associated with one or two modular units, as well as other operations on the states of MZMs.
    Type: Application
    Filed: September 11, 2020
    Publication date: January 7, 2021
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
  • Patent number: 10777605
    Abstract: Various embodiments of a modular unit for a topologic qubit and of scalable quantum computing architectures using such modular units are disclosed herein. For example, one example embodiment is a modular unit for a topological obit comprising 6 Majorana zero modes (MZMs) on a mesoscopic superconducting island. These units can provide the computational MZMs with protection from quasiparticle poisoning. Several possible realizations of these modular units are described herein. Also disclosed herein are example designs for scalable quantum computing, architectures comprising the modular units together with gates and reference arms (e.g., quantum dots, Majorana wires, etc.) configured to enable joint parity measurements to be performed for various combinations of two or four MZMs associated with one or two modular units, as well as other operations on the states of MZMs.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: September 15, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
  • Patent number: 10692010
    Abstract: The disclosure relates to a quantum device and method of fabricating the same. The device comprises one or more semiconductor-superconductor nanowires, each comprising a length of semiconductor material and a coating of superconductor material coated on the semiconductor material. The nanowires may be formed over a substrate. In a first aspect at least some of the nanowires are full-shell nanowires with superconductor material being coated around a full perimeter of the semiconductor material along some or all of the length of the wire, wherein the device is operable to induce at least one Majorana zero mode, MZM, in one or more active ones of the full-shell nanowires. In a second aspect at least some of the nanowires are arranged vertically relative to the plane of the substrate in the finished device.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: June 23, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Michael Hartley Freedman, Bernard van Heck, Georg Wolfgang Winkler, Torsten Karzig, Roman Lutchyn, Peter Krogstrup Jeppesen, Chetan Nayak, Charles Masamed Marcus, Saulius Vaitiekenas
  • Patent number: 10679138
    Abstract: A fusion outcome quasiparticle may be trapped in a potential well of a topological segment. The fusion outcome quasiparticle may be the product of fusion of a first quasiparticle and a second quasiparticle, where the first and the second quasiparticles are localized at ends of a topological segment. The potential well having the fusion outcome quasiparticle trapped therein and a third quasiparticle may be moved relative to each other such that the potential well and the third quasiparticle are brought toward each other. The quasiparticles may be Majorana modes of a nanowire.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: June 9, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Michael H. Freedman, Zhenghan Wang, Roman M. Lutchyn, Chetan Nayak, Parsa Bonderson
  • Patent number: 10665701
    Abstract: The disclosure relates to a quantum device and method of fabricating the same. The device comprises one or more semiconductor-superconductor nanowires, each comprising a length of semiconductor material and a coating of superconductor material coated on the semiconductor material. The nanowires may be formed over a substrate. In a first aspect at least some of the nanowires are full-shell nanowires with superconductor material being coated around a full perimeter of the semiconductor material along some or all of the length of the wire, wherein the device is operable to induce at least one Majorana zero mode, MZM, in one or more active ones of the full-shell nanowires. In a second aspect at least some of the nanowires are arranged vertically relative to the plane of the substrate in the finished device.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: May 26, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Michael Hartley Freedman, Bernard van Heck, Georg Wolfgang Winkler, Torsten Karzig, Roman Lutchyn, Peter Krogstrup Jeppesen, Chetan Nayak, Charles Masamed Marcus, Saulius Vaitiekėnas
  • Patent number: 10635988
    Abstract: Embodiments of the disclosed technology comprise methods and/or devices for performing measurements and/or manipulations of the collective state of a set of Majorana quasiparticles/Majorana zero modes (MZMs). Example methods/devices utilize the shift of the combined energy levels due to coupling multiple quantum systems (e.g., in a Stark-effect-like fashion). The example methods can be used for performing measurements of the collective topological charge or fermion parity of a group of MZMs (e.g., a pair of MZMs or a group of 4 MZMs). The example devices can be utilized in any system supporting MZMs.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: April 28, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Roman Lutchyn, Parsa Bonderson, Michael Freedman, Torsten Karzig, Chetan Nayak, Jason Alicea, Christina Knapp
  • Publication number: 20200098821
    Abstract: Various embodiments of a modular unit for a topologic qubit and of scalable quantum computing architectures using such modular units are disclosed herein. For example, one example embodiment is a modular unit for a topological obit comprising 6 Majorana zero modes (MZMs) on a mesoscopic super-conducting island. These units can provide the computational MZMs with protection from quasiparticle poisoning. Several possible realizations of these modular units are described herein. Also disclosed herein are example designs for scalable quantum computing, architectures comprising the modular units together with gates and reference arms (e.g., quantum dots, Majorana wires, etc.) configured to enable joint parity measurements to be performed for various combinations of two or four MZMs associated with one or two modular units, as well as other operations on the states of MZMs.
    Type: Application
    Filed: November 11, 2019
    Publication date: March 26, 2020
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
  • Publication number: 20200027971
    Abstract: The disclosure relates to a quantum device and method of fabricating the same. The device comprises one or more semiconductor-superconductor nanowires, each comprising a length of semiconductor material and a coating of superconductor material coated on the semiconductor material. The nanowires may be formed over a substrate. In a first aspect at least some of the nanowires are full-shell nanowires with superconductor material being coated around a full perimeter of the semiconductor material along some or all of the length of the wire, wherein the device is operable to induce at least one Majorana zero mode, MZM, in one or more active ones of the full-shell nanowires. In a second aspect at least some of the nanowires are arranged vertically relative to the plane of the substrate in the finished device.
    Type: Application
    Filed: September 3, 2018
    Publication date: January 23, 2020
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Michael Hartley Freedman, Bernard van Heck, Georg Wolfgang Winkler, Torsten Karzig, Roman Lutchyn, Peter Krogstrup Jeppesen, Chetan Nayak, Charles Masamed Marcus, Saulius Vaitiekenas
  • Publication number: 20200027030
    Abstract: The disclosure relates to a quantum device and method of fabricating the same. The device comprises one or more semiconductor-superconductor nanowires, each comprising a length of semiconductor material and a coating of superconductor material coated on the semiconductor material. The nanowires may be formed over a substrate. In a first aspect at least some of the nanowires are full-shell nanowires with superconductor material being coated around a full perimeter of the semiconductor material along some or all of the length of the wire, wherein the device is operable to induce at least one Majorana zero mode, MZM, in one or more active ones of the full-shell nanowires. In a second aspect at least some of the nanowires are arranged vertically relative to the plane of the substrate in the finished device.
    Type: Application
    Filed: September 3, 2018
    Publication date: January 23, 2020
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Michael Hartley Freedman, Bernard van Heck, Georg Wolfgang Winkler, Torsten Karzig, Roman Lutchyn, Peter Krogstrup Jeppesen, Chetan Nayak, Charles Masamed Marcus, Saulius Vaitiekenas
  • Patent number: 10490600
    Abstract: Various embodiments of a modular unit for a topologic qubit and of scalable quantum computing architectures using such modular units are disclosed herein. For example, one example embodiment is a modular unit for a topological qubit comprising 6 Majorana zero modes (MZMs) on a mesoscopic superconducting island. These units can provide the computational MZMs with protection from quasiparticle poisoning. Several possible realizations of these modular units are described herein. Also disclosed herein are example designs for scalable quantum computing architectures comprising the modular units together with gates and reference arms (e.g., quantum dots, Majorana wires, etc.) configured to enable joint parity measurements to be performed for various combinations of two or four MZMs associated with one or two modular units, as well as other operations on the states of MZMs.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: November 26, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
  • Patent number: 10346348
    Abstract: Among the embodiments disclosed herein are example methods for generating all Clifford gates for a system of Majorana Tetron qubits (quasiparticle poisoning protected) given the ability to perform certain 4 Majorana zero mode measurements. Also disclosed herein are example designs for scalable quantum computing architectures that enable the methods for generating the Clifford gates, as well as other operations on the states of MZMs. These designs are configured in such a way as to allow the generation of all the Clifford gates with topological protection and non-Clifford gates (e.g. a ?/8-phase gate) without topological protection, thereby producing a computationally universal gate set. Several possible realizations of these architectures are disclosed.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: July 9, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Matthew Hastings, Torsten Karzig, Parsa Bonderson, Michael Freedman, Roman Lutchyn, Chetan Nayak
  • Patent number: 10204305
    Abstract: Measurement-only topological quantum computation using both projective and interferometrical measurement of topological charge is described. Various issues that would arise when realizing it in fractional quantum Hall systems are discussed.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: February 12, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Michael Freedman, Chetan Nayak, Parsa Bonderson
  • Publication number: 20180052806
    Abstract: Among the embodiments disclosed herein are example methods for generating all Clifford gates for a system of Majorana Tetron qubits (quasiparticle poisoning protected) given the ability to perform certain 4 Majorana zero mode measurements. Also disclosed herein are example designs for scalable quantum computing architectures that enable the methods for generating the Clifford gates, as well as other operations on the states of MZMs. These designs are configured in such a way as to allow the generation of all the Clifford gates with topological protection and non-Clifford gates (e.g. a ?/8-phase gate) without topological protection, thereby producing a computationally universal gate set. Several possible realizations of these architectures are disclosed.
    Type: Application
    Filed: June 28, 2017
    Publication date: February 22, 2018
    Applicant: Microsof Technology Licensing, LLC
    Inventors: Matthew Hastings, Torsten Karzig, Parsa Bonderson, Michael Freedman, Roman Lutchyn, Chetan Nayak
  • Publication number: 20180053809
    Abstract: Various embodiments of a modular unit for a topologic qubit and of scalable quantum computing architectures using such modular units are disclosed herein. For example, one example embodiment is a modular unit for a topological qubit comprising 6 Majorana zero modes (MZMs) on a mesoscopic superconducting island. These units can provide the computational MZMs with protection from quasiparticle poisoning. Several possible realizations of these modular units are described herein. Also disclosed herein are example designs for scalable quantum computing architectures comprising the modular units together with gates and reference arms (e.g., quantum dots, Majorana wires, etc.) configured to enable joint parity measurements to be performed for various combinations of two or four MZMs associated with one or two modular units, as well as other operations on the states of MZMs.
    Type: Application
    Filed: June 28, 2017
    Publication date: February 22, 2018
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson