Patents by Inventor Parsa Bonderson
Parsa Bonderson 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).
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Patent number: 12217131Abstract: 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: GrantFiled: June 15, 2023Date of Patent: February 4, 2025Assignee: Microsoft Technology Licensing, LLCInventors: Parsa Bonderson, David Alexander Aasen, Christina Paulsen Knapp, Roman Bela Bauer
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Publication number: 20240419999Abstract: 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: ApplicationFiled: June 15, 2023Publication date: December 19, 2024Applicant: Microsoft Technology Licensing, LLCInventors: Parsa BONDERSON, David Alexander AASEN, Christina Paulsen KNAPP, Roman Bela BAUER
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Publication number: 20240412092Abstract: 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: ApplicationFiled: June 9, 2023Publication date: December 12, 2024Inventors: Matthew Benjamin HASTINGS, Parsa BONDERSON, Zhenghan WANG, Jeongwan HAAH, David Alexander AASEN
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Publication number: 20240415028Abstract: 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: ApplicationFiled: June 9, 2023Publication date: December 12, 2024Applicant: Microsoft Technology Licensing, LLCInventors: Parsa BONDERSON, Christina Paulsen KNAPP, Roman Bela BAUER, Emily Anne TOOMEY, David Alexander AASEN
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Publication number: 20240378481Abstract: 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: ApplicationFiled: May 5, 2023Publication date: November 14, 2024Applicant: Microsoft Technology Licensing, LLCInventors: Parsa BONDERSON, David Alexander AASEN, Christina Paulsen KNAPP
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Publication number: 20240378477Abstract: 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: ApplicationFiled: May 5, 2023Publication date: November 14, 2024Applicant: Microsoft Technology Licensing, LLCInventors: Parsa BONDERSON, David Alexander AASEN, Christina Paulsen KNAPP
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Publication number: 20240249174Abstract: 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: ApplicationFiled: January 25, 2023Publication date: July 25, 2024Applicant: Microsoft Technology Licensing, LLCInventors: Parsa BONDERSON, David Alexander AASEN, Roman Bela BAUER, Christina Paulsen KNAPP
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Publication number: 20240119331Abstract: 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: ApplicationFiled: August 26, 2022Publication date: April 11, 2024Inventors: Parsa BONDERSON, David Alexander AASEN, Christina Paulsen KNAPP
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Patent number: 11839167Abstract: 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: GrantFiled: December 28, 2020Date of Patent: December 5, 2023Assignee: Microsoft Technology Licensing, LLCInventors: Parsa Bonderson, Chetan Nayak, David Reilly, Andrea Franchini Young, Michael Zaletel
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Publication number: 20230309418Abstract: 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: ApplicationFiled: May 5, 2023Publication date: September 28, 2023Applicant: Microsoft Technology Licensing, LLCInventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
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Patent number: 11751493Abstract: 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: GrantFiled: December 28, 2020Date of Patent: September 5, 2023Assignee: Microsoft Technology Licensing, LLCInventors: Parsa Bonderson, Chetan Nayak, David Reilly, Andrea Franchini Young, Michael Zaletel
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Patent number: 11707000Abstract: A quantum device is fabricated by forming a network of nanowires oriented in a plane of a substrate to produce a Majorana-based topological qubit. The nanowires are formed from combinations of selective-area-grown semiconductor material along with regions of a superconducting material. The selective-area-grown semiconductor material is grown by etching trenches to define the nanowires and depositing the semiconductor material in the trenches. A side gate is formed in an etched trench and situated to control a topological segment of the qubit.Type: GrantFiled: June 27, 2018Date of Patent: July 18, 2023Assignee: Microsoft Technology Licensing, LLCInventors: Dmitry Pikulin, Michael H. Freedman, Roman Lutchyn, Peter Krogstrup Jeppesen, Parsa Bonderson
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Patent number: 11696516Abstract: 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: GrantFiled: September 11, 2020Date of Patent: July 4, 2023Assignee: Microsoft Technology Licensing, LLCInventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
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Patent number: 11507875Abstract: A quantum device includes a syndrome measurement circuit that implements an correction code using a plurality of Majorana qubit islands. The syndrome measurement circuit is adapted to effect a syndrome measurement by performing a sequence of measurement-only operations, where each one of the measurement-only operations involves at most two of the Majorana qubit islands.Type: GrantFiled: June 30, 2020Date of Patent: November 22, 2022Assignee: Microsoft Technology Licensing, LLCInventors: Roman Bela Bauer, Parsa Bonderson, Alan D Tran
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Publication number: 20220069219Abstract: 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: ApplicationFiled: December 28, 2020Publication date: March 3, 2022Applicant: Microsoft Technology Licensing, LLCInventors: Parsa Bonderson, Chetan Nayak, David Reilly, Andrea Franchini Young, Michael Zaletel
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Publication number: 20220067563Abstract: 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: ApplicationFiled: December 28, 2020Publication date: March 3, 2022Applicant: Microsoft Technology Licensing, LLCInventors: Parsa Bonderson, Chetan Nayak, David Reilly, Andrea Franchini Young, Michael Zaletel
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Publication number: 20210279627Abstract: A quantum device includes a syndrome measurement circuit that implements an correction code using a plurality of Majorana qubit islands. The syndrome measurement circuit is adapted to effect a syndrome measurement by performing a sequence of measurement-only operations, where each one of the measurement-only operations involves at most two of the Majorana qubit islands.Type: ApplicationFiled: June 30, 2020Publication date: September 9, 2021Inventors: Roman Bela BAUER, Parsa BONDERSON, Alan D TRAN
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Publication number: 20210005661Abstract: 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: ApplicationFiled: September 11, 2020Publication date: January 7, 2021Applicant: Microsoft Technology Licensing, LLCInventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
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Patent number: 10777605Abstract: 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: GrantFiled: November 11, 2019Date of Patent: September 15, 2020Assignee: Microsoft Technology Licensing, LLCInventors: Michael Freedman, Chetan Nayak, Roman Lutchyn, Torsten Karzig, Parsa Bonderson
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Publication number: 20200287120Abstract: The disclosure concerns fabricating a quantum device. In an embodiment, a method is disclosed comprising: providing a substrate and an insulator formed on the substrate; from combinations of selective-area-grown semiconductor material along with regions of a superconducting material, forming a network of nanowires oriented in a plane of the substrate which can be used to produce a Majorana-based topological qubit; and fabricating a side gate for controlling a topological segment of the qubit; wherein the selective-area-grown semiconductor material is grown on the substrate, by etching trenches in the insulator formed on the substrate to define the nanowires and depositing the semiconductor material in the trenches defining the nanowires; and wherein the fabricating of the side gate comprises etching the dielectric to create a trench for the side gate and depositing the side gate in the trench for the side gate.Type: ApplicationFiled: June 27, 2018Publication date: September 10, 2020Applicant: Microsoft Technology Licensing, LLCInventors: Dmitry Pikulin, Michael H. Freedman, Roman Lutchyn, Peter Krogstrup Jeppesen, Parsa Bonderson