Patents by Inventor Michel Devoret
Michel Devoret 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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Publication number: 20240095569Abstract: Techniques are described for detecting when background radiation has impacted a qubit without the need for additional hardware. In particular, a quantum system may operate readout hardware to read the state of a qubit in addition to operating the readout hardware to detect when an impact has occurred. Readouts from impacted qubits can then be ignored during error correction, and those qubits reset for subsequent operations. In some cases, a readout resonator coupled to a qubit can be implemented as a readout resonator with a high kinetic inductance.Type: ApplicationFiled: September 12, 2023Publication date: March 21, 2024Applicant: Yale UniversityInventors: Max Hays, Michel Devoret
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Patent number: 11791818Abstract: 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: GrantFiled: January 15, 2020Date of Patent: October 17, 2023Assignee: Yale UniversityInventors: Shantanu Mundhada, Nicholas Frattini, Shruti Puri, Shyam Shankar, Steven M. Girvin, Michel Devoret
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Patent number: 11782779Abstract: 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: GrantFiled: January 5, 2019Date of Patent: October 10, 2023Assignee: Yale UniversityInventors: Victor V. Albert, Shantanu Mundhada, Alexander Grimm, Steven Touzard, Michel Devoret, Liang Jiang
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Patent number: 11737376Abstract: A superconducting device includes two nodes and a Josephson junction coupled between the two nodes, wherein the Josephson junction is characterized by a superconducting phase difference, ?, wherein the superconducting device has a potential that varies as a function of the superconducting phase difference, ?, and has a single potential well. The potential has a non-zero cubic term and quartic term is zero. The Josephson junction may be a single small Josephson junction. The superconducting device may include a superconducting ring connected between the two nodes. The superconducting ring may include a first ring portion with a plurality of large Josephson junctions connected in series. The superconducting ring may also include a second ring portion that includes the single small Josephson junction in parallel with the plurality of large Josephson junctions between the two nodes.Type: GrantFiled: December 11, 2018Date of Patent: August 22, 2023Assignee: Yale UniversityInventors: Nicholas Frattini, Uri Vool, Shyam Shankar, Anirudh Narla, Katrina Sliwa, Michel Devoret, Volodymyr Sivak
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Patent number: 11635456Abstract: The present application describes a waveform processor for control of quantum mechanical systems. The waveform processor may be used to control quantum systems used in quantum computation, such as qubits. According to some embodiments, a waveform processor includes a first sequencer configured to sequentially execute master instructions according to a defined order and output digital values in response to the executed master instructions, and a second sequencer coupled to the first sequencer and configured to generate analog waveforms at least in part by transforming digital waveforms according to digital values received from the first sequencer. The analog waveforms are applied to a quantum system. In some embodiments, the waveform processor further includes a waveform analyzer configured to integrate analog waveforms received from a quantum system and output results of said integration to the first sequencer.Type: GrantFiled: February 10, 2017Date of Patent: April 25, 2023Assignee: Yale UniversityInventors: Nissim Ofek, Luigi Frunzio, Michel Devoret, Robert J. Schoelkopf, III
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Patent number: 11449384Abstract: Techniques for providing hardware-efficient fault-tolerant quantum operations are provided. In some aspects a cavity and an ancilla transmon are used to implement a quantum operation by encoding a logical qubit using more than two energy levels of the cavity, encoding information using more than two energy levels of the ancilla transmon, and creating an interaction between the cavity and the ancilla transmon that decouples at least one error type in the ancilla transmon from the cavity.Type: GrantFiled: January 5, 2019Date of Patent: September 20, 2022Assignee: Yale UniversityInventors: Serge Rosenblum, Philip Reinhold, Liang Jiang, Steven M. Girvin, Luigi Frunzio, Michel Devoret, Robert J. Schoelkopf, III
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Publication number: 20220103172Abstract: 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: ApplicationFiled: January 15, 2020Publication date: March 31, 2022Applicant: Yale UniversityInventors: Shantanu Mundhada, Nicholas Frattini, Shruti Puri, Shyam Shankar, Steven M. Girvin, Michel Devoret
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Patent number: 11271533Abstract: A wireless Josephson-junction-based amplifier is described that provides improved tunability and increased control over both a quality factor Q and participation ratio p of the amplifier. The device may be fabricated on a chip and mounted in a waveguide. No wire bonding between the amplifier and coaxial cables or a printed circuit board is needed. At least one antenna on the chip may be used to couple energy between the waveguide and wireless JBA. The amplifier is capable of gains greater than 25 dB.Type: GrantFiled: March 7, 2018Date of Patent: March 8, 2022Assignee: Yale UniversityInventors: Anirudh Narla, Katrina Sliwa, Michael Hatridge, Shyam Shankar, Luigi Frunzio, Robert J. Schoelkopf, III, Michel Devoret
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Patent number: 11263546Abstract: Techniques are described in which a qubit is far off-resonantly, or dispersively, coupled to a quantum mechanical oscillator. In particular, a dispersive coupling between a physical qubit and a quantum mechanical oscillator may be selected such that control of the combined qubit-oscillator system can be realized. The physical qubit may be driven with an electromagnetic pulse (e.g., a microwave pulse) and the quantum mechanical oscillator simultaneously driven with another electromagnetic pulse, the combination of which results in a change in state of the qubit-oscillator system.Type: GrantFiled: July 22, 2016Date of Patent: March 1, 2022Assignee: Yale UniversityInventors: Reinier Heeres, Philip Reinhold, Victor V. Albert, Liang Jiang, Luigi Frunzio, Michel Devoret, Robert J. Schoelkopf, III
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Patent number: 11223355Abstract: Techniques for modifying the Josephson potential of a transmon qubit by shunting the transmon with an inductance are described. The inclusion of this inductance may increase the confined potential of the qubit system compared with the conventional transmon, which may lead to a transmon qubit that is stable at much higher drive energies. The inductive shunt may serve the purpose of blocking some or all phase-slips between the electrodes of the qubit. As a result, the inductively shunted transmon may offer an advantage over conventional devices when used for applications involving high energy drives, whilst offering few to no drawbacks in comparison to conventional devices when used at lower drive energies.Type: GrantFiled: December 11, 2019Date of Patent: January 11, 2022Assignee: Yale UniversityInventors: W. Clarke Smith, Jayameenakshi Venkatraman, Xu Xiao, Lucas Verney, Luigi Frunzio, Shyam Shankar, Mazyar Mirrahimi, Michel Devoret
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Publication number: 20210390444Abstract: Techniques for performing quantum information processing using an asymmetric error channel are provided. According to some aspects, a quantum information processing includes a data qubit and an ancilla qubit, the ancilla qubit having an asymmetric error channel. The data qubit is coupled to the ancilla qubit. The ancilla qubit may be driven with a stabilizing microwave field to create the asymmetric error channel.Type: ApplicationFiled: June 28, 2019Publication date: December 16, 2021Applicant: Yale UniversityInventors: Shruti Puri, Alexander Grimm, Philippe Campagne-lbarcq, Steven M. Girvin, Michel Devoret
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Patent number: 11184006Abstract: According to some aspects, a method is provided of operating a system that includes a multi-level quantum system dispersively coupled to a first quantum mechanical oscillator and dispersively coupled to a second quantum mechanical oscillator, the method comprising applying a first drive waveform to the multi-level quantum system, applying one or more second drive waveforms to the first quantum mechanical oscillator, and applying one or more third drive waveforms to the second quantum mechanical oscillator.Type: GrantFiled: January 13, 2017Date of Patent: November 23, 2021Assignee: Yale UniversityInventors: Chen Wang, Yvonne Gao, Luigi Frunzio, Michel Devoret, Robert J. Schoelkopf, III
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Patent number: 11106991Abstract: Some aspects are directed to a method of operating an apparatus, the apparatus comprising a first quantum system having a plurality of coherent quantum states, the first quantum system being coupled to a second quantum system, the method comprising providing an input energy signal to the second quantum system that stimulates energy transfer between the first quantum system and the second quantum system and that causes net dissipation of energy to be output from the second quantum system, wherein the input energy signal includes at least two components having different frequencies and each having an amplitude and a phase, and adiabatically varying the amplitude and the phase of the at least two components of the input energy signal to cause a change in one or more of the plurality of coherent quantum states of the first quantum system.Type: GrantFiled: February 26, 2016Date of Patent: August 31, 2021Assignee: Yale UniversityInventors: Liang Jiang, Robert J. Schoelkopf, III, Michel Devoret, Victor V. Albert, Stefan Krastanov, Chao Shen
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Publication number: 20210258010Abstract: Techniques for modifying the Josephson potential of a transmon qubit by shunting the transmon with an inductance are described. The inclusion of this inductance may increase the confined potential of the qubit system compared with the conventional transmon, which may lead to a transmon qubit that is stable at much higher drive energies. The inductive shunt may serve the purpose of blocking some or all phase-slips between the electrodes of the qubit. As a result, the inductively shunted transmon may offer an advantage over conventional devices when used for applications involving high energy drives, whilst offering few to no drawbacks in comparison to conventional devices when used at lower drive energies.Type: ApplicationFiled: December 11, 2019Publication date: August 19, 2021Applicant: Yale UniversityInventors: W. Clarke Smith, Jayameenakshi Venkatraman, Xu Xiao, Lucas Verney, Luigi Frunzio, Shyam Shankar, Mazyar Mirrahimi, Michel Devoret
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Publication number: 20210125096Abstract: Techniques for performing quantum information processing using an asymmetric error channel are provided. According to some aspects, a quantum information processing includes a data qubit and an ancilla qubit, the ancilla qubit having an asymmetric error channel. The data qubit is coupled to the ancilla qubit. The ancilla qubit may be driven with a stabilizing microwave field to create the asymmetric error channel.Type: ApplicationFiled: June 28, 2019Publication date: April 29, 2021Applicant: Yale UniversityInventors: Shruti Puri, Alexander Grimm, Philippe Campagne-lbarcq, Steven M. Girvin, Michel Devoret
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Publication number: 20210021245Abstract: A superconducting device includes two nodes and a Josephson junction coupled between the two nodes, wherein the Josephson junction is characterized by a superconducting phase difference, ?, wherein the superconducting device has a potential that varies as a function of the superconducting phase difference, ?, and has a single potential well. The potential has a non-zero cubic term and quartic term is zero. The Josephson junction may be a single small Josephson junction. The superconducting device may include a superconducting ring connected between the two nodes. The superconducting ring may include a first ring portion with a plurality of large Josephson junctions connected in series. The superconducting ring may also include a second ring portion that includes the single small Josephson junction in parallel with the plurality of large Josephson junctions between the two nodes.Type: ApplicationFiled: December 11, 2018Publication date: January 21, 2021Applicant: Yale UniversityInventors: Nicholas Frattini, Uri Vool, Shyam Shankar, Anirudh Narla, Katrina Sliwa, Michel Devoret, Volodymyr Sivak
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Publication number: 20200334104Abstract: Techniques for providing hardware-efficient fault-tolerant quantum operations are provided. In some aspects a cavity and an ancilla transmon are used to implement a quantum operation by encoding a logical qubit using more than two energy levels of the cavity, encoding information using more than two energy levels of the ancilla transmon, and creating an interaction between the cavity and the ancilla transmon that decouples at least one error type in the ancilla transmon from the cavity.Type: ApplicationFiled: January 5, 2019Publication date: October 22, 2020Applicant: Yale UniversityInventors: Serge Rosenblum, Philip Reinhold, Liang Jiang, Steven M. Girvin, Luigi Frunzio, Michel Devoret, Robert J. Schoelkopf III
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Publication number: 20200334101Abstract: 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: ApplicationFiled: January 5, 2019Publication date: October 22, 2020Applicant: Yale UniversityInventors: Victor V. Albert, Shantanu Mundhada, Alexander Grimm, Steven Touzard, Michel Devoret, Liang Jiang
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Patent number: 10776709Abstract: According to some aspects, a quantum information system is provided that includes an ancilla qubit; a qudit coupled to the ancilla qubit, a detector configured to generate a detection result based on a quantum state of the ancilla qubit, and a driving source coupled to the qudit and the ancilla qubit and configured to apply at least one qudit driving signal to the qudit based on the detection result and at least one qubit driving signal to the qudit based on the detection result.Type: GrantFiled: November 10, 2017Date of Patent: September 15, 2020Assignee: Yale UniversityInventors: Chao Shen, Kyungjoo Noh, Victor V. Albert, Stefan Krastanov, Michel Devoret, Robert J. Schoelkopf, III, Steven M. Girvin, Liang Jiang
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Publication number: 20200287540Abstract: Techniques for modifying the Josephson potential of a transmon qubit by shunting the transmon with an inductance are described. The inclusion of this inductance may increase the confined potential of the qubit system compared with the conventional transmon, which may lead to a transmon qubit that is stable at much higher drive energies. The inductive shunt may serve the purpose of blocking some or all phase-slips between the electrodes of the qubit. As a result, the inductively shunted transmon may offer an advantage over conventional devices when used for applications involving high energy drives, whilst offering few to no drawbacks in comparison to conventional devices when used at lower drive energies.Type: ApplicationFiled: December 11, 2019Publication date: September 10, 2020Applicant: Yale UniversityInventors: W. Clarke Smith, Jayameenakshi Venkatraman, Xu Xiao, Lucas Verney, Luigi Frunzio, Shyam Shankar, Mazyar Mirrahimi, Michel Devoret