公开(公告)号：US10693566B2

公开(公告)日：2020-06-23

申请号：US15567198

申请日：2016-04-15

Applicant: Yale University

Inventor： Katrina Sliwa ,  Michael Hatridge ,  Anirudh Narla ,  Shyam Shankar ,  Luigi Frunzio ,  Robert J. Schoelkopf, III ,  Michel Devoret

IPC: H04B10/90 ,  G06N99/00 ,  H04B10/70 ,  H01L27/18 ,  H03D7/00 ,  H01L39/02 ,  H01L39/04 ,  H01L39/22 ,  H01P3/12 ,  H03F19/00 ,  H03D9/06 ,  H01P5/08 ,  G06N10/00 ,  H01P5/02 ,  H01P5/103

Abstract: A wireless Josephson-junction-based parametric converter is described. The converter may be formed on a substrate with antennas that pump are configured to wirelessly receive pump, signal and idler frequencies and couple the received frequencies to the converter's circuitry. Capacitors may also be fabricated on the same substrate and sized to tune operation of the converter to desired frequencies. The converter may be coupled directly to microwave waveguides, and may be tuned to different signal frequencies by applying magnetic flux to the converter circuitry.

公开(公告)号：US10541659B2

公开(公告)日：2020-01-21

申请号：US15029666

申请日：2014-10-15

Applicant: Yale University

Inventor： Baleegh Abdo ,  Katrina Sliwa ,  Luigi Frunzio ,  Robert J. Schoelkopf, III ,  Michel Devoret

IPC: H03F7/04 ,  H01L39/22 ,  H01P5/18 ,  H03F7/00 ,  H03F3/195 ,  H03F3/60 ,  H03F1/26

Abstract: A low-noise directional amplifier includes a first port, a second port, a first coupler and a second coupler. The first port is coupled to a first coupler. The low-noise directional amplifier also includes at least two phase preserving amplifiers, a first phase preserving amplifier connected to the first coupler and a second coupler, and the second phase preserving amplifier connected to the first coupler and the second coupler.

公开(公告)号：US10468740B2

公开(公告)日：2019-11-05

申请号：US15553012

申请日：2016-02-26

Applicant: Yale University

Inventor： Zlatko Minev ,  Kyle Serniak ,  Ioan Pop ,  Yiwen Chu ,  Teresa Brecht ,  Luigi Frunzio ,  Michel Devoret ,  Robert J. Schoelkopf, III

IPC: H01P7/06 ,  G06N10/00 ,  H01L39/02

Abstract: According to some aspects, a quantum mechanical system is provided, comprising a resonator having a plurality of superconducting surfaces and configured to support at least one electromagnetic oscillation mode within a three-dimensional region, wherein the plurality of superconducting surfaces include a first superconducting surface that defines a first plane, and a physical qubit comprising at least one planar component that is planar within the first plane and borders the three-dimensional region.

公开(公告)号：US10424712B2

公开(公告)日：2019-09-24

申请号：US14761914

申请日：2014-01-17

Applicant: Yale University

Inventor： Robert J. Schoelkopf, III ,  Luigi Frunzio ,  Michel Devoret ,  Teresa Brecht

IPC: H01L39/24 ,  H01L39/02 ,  H01L27/18 ,  H01L39/04

Abstract: Some embodiments are directed to a device including multiple substrates comprising one or more troughs. The substrates are disposed such that the one or more troughs form at least one enclosure. At least one superconducting layer covers at least a portion of the at least one enclosure. Other embodiments are directed to a method for manufacturing a superconducting device. The method includes acts of forming at least one trough in at least a first substrate; covering at least a portion of the first substrate with a superconducting material; covering at least a portion of a second substrate with the superconducting material; and bonding the first substrate and the second substrate to form at least one enclosure comprising the at least one trough and the superconducting material.

公开(公告)号：US20190049495A1

公开(公告)日：2019-02-14

申请号：US16076411

申请日：2017-02-10

Applicant: Yale University

Inventor： Nissim Ofek ,  Luigi Frunzio ,  Michel Devoret ,  Robert J. Schoelkopf, III

IPC: G01R23/16 ,  G06N99/00 ,  G01R33/20 ,  G06F17/14 ,  G06F15/16 ,  G06F9/50 ,  G06F9/38

Abstract: According to some aspects, a waveform processor is provided for control of quantum mechanical systems. Some embodiments of the waveform processor may be used to control quantum systems used in quantum computation, such as qubits. According to some embodiments, a waveform processor may include 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 may be applied to a quantum system. In some embodiments, the waveform processor may further include a waveform analyzer configured to integrate analog waveforms received from a quantum system and output results of said integration to the first sequencer.

公开(公告)号：US20180032895A1

公开(公告)日：2018-02-01

申请号：US15553047

申请日：2016-02-26

Applicant: Yale University

Inventor： Liang Jiang ,  Robert J. Schoelkopf, III ,  Michel Devoret ,  Victor V. Albert ,  Stefan Krastanov ,  Chao Shen

IPC: G06N99/00 ,  H04B10/70

CPC classification number: G06N10/00 ,  H04B10/70

Abstract: 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.

公开(公告)号：US20250169377A1

公开(公告)日：2025-05-22

申请号：US18872628

申请日：2023-06-09

Applicant: Yale University

Inventor： Rodrigo G. Cortiñas ,  Jayameenakshi Venkatraman ,  Xu Xiao ,  Nicholas Frattini ,  Michel Devoret

IPC: H10N60/12 ,  G06N10/40 ,  H10N60/80

Abstract: Techniques are describing for designing and operating a quantum oscillator. In contrast with conventional approaches to operating a quantum oscillator, the present techniques relate to an oscillator design that has less bare nonlinearity than is conventionally thought to be necessary for efficient operation. Moreover, the oscillator may be driven at a frequency that is detuned away from the frequency at which a nonlinear oscillator is typically driven. In particular, the detuned drive frequency may be substantially different from the typical drive frequency, and furthermore may be a frequency that may be expected to produce a low coherence time without also engineering the reduced nonlinearity described above. As a result, the combination of an engineered reduced nonlinearity combined with a detuned drive may result in a well behaved oscillator with a strong effective nonlinearity that exhibits significantly longer coherence times than conventional quantum oscillators.

公开(公告)号：US20210390444A9

公开(公告)日：2021-12-16

申请号：US17253460

申请日：2019-06-28

Applicant: Yale University

Inventor： Shruti Puri ,  Alexander Grimm ,  Philippe Campagne-lbarcq ,  Steven M. Girvin ,  Michel Devoret

IPC: G06N10/00 ,  H04L1/04

Abstract: 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.

公开(公告)号：US11184006B2

公开(公告)日：2021-11-23

申请号：US16068405

申请日：2017-01-13

Applicant: Yale University

Inventor： Chen Wang ,  Yvonne Gao ,  Luigi Frunzio ,  Michel Devoret ,  Robert J. Schoelkopf, III

IPC: H03K19/195 ,  B82Y10/00 ,  G06N10/00 ,  H04B10/70 ,  H03B5/18

Abstract: 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.

公开(公告)号：US20210258010A9

公开(公告)日：2021-08-19

申请号：US16711002

申请日：2019-12-11

Applicant: Yale University

Inventor： W. Clarke Smith ,  Jayameenakshi Venkatraman ,  Xu Xiao ,  Lucas Verney ,  Luigi Frunzio ,  Shyam Shankar ,  Mazyar Mirrahimi ,  Michel Devoret

IPC: H03K17/92 ,  H01L27/18

Abstract: 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.