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公开(公告)号：US12048256B2
公开(公告)日：2024-07-23
申请号：US17241688
申请日：2021-04-27
发明人： Miguel Comparan , Adam James Muff , Indranil Sen , Paul D Berndt
摘要： Embodiments of the present disclosure include techniques for interfacing with superconducting circuits and systems. In one embodiment, the present disclosure includes interface circuitry, including driver circuits and/or receiver circuits to send/receive signals with a superconducting circuit. In another embodiment, the present disclosure includes superconducting circuits and techniques for generating a trigger signal from and external clock that is based on a superconducting resonator. In yet another embodiment, the present disclosure includes superconducting data capture circuits that may be used to couple external data to and/or from superconducting logic.
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公开(公告)号：US12047063B2
公开(公告)日：2024-07-23
申请号：US18047792
申请日：2022-10-19
发明人： Timothy Phung
IPC分类号： H03K17/92 , G06F30/394 , G06N10/00 , H10N69/00
CPC分类号： H03K17/92 , G06F30/394 , G06N10/00 , H10N69/00
摘要： Techniques for designing, creating, and utilizing a current biased tunable qubit are presented. A qubit device can comprise a first Josephson junction (JJ) located along a first current path of the device, and a second JJ and third JJ coupled in series along a second current path in parallel with the first current path, wherein the second and third JJs facilitate controlling frequency of the device. The first JJ can be larger in area than each of the second and third JJs, wherein a current splitting ratio between the first current path and second current path can be increased thereby. The device can comprise a capacitor with a first terminal associated with the second and third JJs, and a second terminal associated with ground. Alternatively, a high kinetic inductance wire can be used in the first current path, instead of the JJ.
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公开(公告)号：US12045743B2
公开(公告)日：2024-07-23
申请号：US17030610
申请日：2020-09-24
摘要： A low-cost solution for performing a quantum operation provides for defining a target unitary that rotates a single qubit by a target rotation to place the qubit in a target state. The method further provides for identifying multiple projective rotation circuits that each implement an approximation of the target rotation upon successful measurement and assigning a selection probability to each of the multiple identified projective rotation circuits, the selection probability being defined by a metric that increases in value in proportion to a proximity between a qubit state resulting from the approximation and the target qubit state. The method further provides for probabilistically selecting one of the multiple projective rotation circuits according to the assigned selection probabilities and outputting a circuit definition that includes the selected projective rotation circuit.
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公开(公告)号：US12039306B1
公开(公告)日：2024-07-16
申请号：US18059839
申请日：2022-11-29
CPC分类号： G06F8/443 , G06F8/74 , G06F11/3409 , G06N10/00 , G06N20/00
摘要： Various methods are provided for quantum computing (QC) based code-optimization. One example method may comprise receiving an indication of one or more runtime hotspots in executed code based on one or more QC algorithms, testing a portion of the executed code associated with at least one of the one or more identified runtime hotspots; generating a plurality of performance information indicators comprising information resulting from the testing of the portion of the code; selecting, based on the plurality of performance information indicators, one QC algorithm for the at least one of the one or more identified runtime hotspots; and utilizing the selected QC algorithm for the at least one of the one or more identified runtime hotspots to optimize the at least one of the one or more identified runtime hotspots.
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公开(公告)号：US20240219951A1
公开(公告)日：2024-07-04
申请号：US18309559
申请日：2023-04-28
发明人： Christopher MONROE , Jiehang ZHANG , David WONG-CAMPOS , Antonios KYPRIANIDIS , Patrick Michael BECKER
CPC分类号： G06E3/005 , B82Y10/00 , B82Y40/00 , G01J1/42 , H01L29/66977 , G01J2001/4247 , G01N21/6458 , G06N10/00
摘要： The disclosure describes an adaptive and optimal imaging of individual quantum emitters within a lattice or optical field of view for quantum computing. Advanced image processing techniques are described to identify individual optically active quantum bits (qubits) with an imager. Images of individual and optically-resolved quantum emitters fluorescing as a lattice are decomposed and recognized based on fluorescence. Expected spatial distributions of the quantum emitters guides the processing, which uses adaptive fitting of peak distribution functions to determine the number of quantum emitters in real time. These techniques can be used for the loading process, where atoms or ions enter the trap one-by-one, for the identification of solid-state emitters, and for internal state-detection of the quantum emitters, where each emitter can be fluorescent or dark depending on its internal state. This latter application is relevant to efficient and fast detection of optically active qubits in quantum simulations and quantum computing.
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公开(公告)号：US12028448B2
公开(公告)日：2024-07-02
申请号：US17418236
申请日：2019-12-19
申请人： VERIQLOUD
发明人： Marc Kaplan
CPC分类号： H04L9/0852 , G06N10/00 , H04L2209/04
摘要： The present invention is related to a method for delegation by a client of the creation of an unknown quantum state to a quantum server, the client having a simplified architecture based on a beam splitter, and the delegation method comprising in particular steps of activating an interaction through the beam splitter and masking by means of delays.
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公开(公告)号：US12026586B2
公开(公告)日：2024-07-02
申请号：US17531652
申请日：2021-11-19
发明人： Alexey Vyacheslavovich Gorshkov , Adam Micah Kaufman , Jeremy Thomas Young , Przemyslaw D. Bienias , Ron Belyansky
摘要： Preparing a metrologically-relevant entangled state includes: providing a plurality of atoms in a regular lattice, wherein each atom is in an initial quantum state of a first state in a ground state manifold; initializing a central atom in the regular lattice to a (|0+|1)/√2 state while all other atoms remain in the first state |0 as remaining atoms; and proceeding, starting with the central atom, to propagate preparation of Greenberger-Horne-Zeilinger (GHZ) states in a nonlinear progression by increasing a number of GHZ states in each iteration through the remaining atoms in a recursive manner, to produce an intermediate GHZ state, such that the intermediate GHZ state acts as an initial GHZ state for a next iteration, until a final GHZ state is formed to prepare the metrologically-relevant entangled state of the atoms.
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公开(公告)号：US12021507B2
公开(公告)日：2024-06-25
申请号：US16551004
申请日：2019-08-26
摘要： A coupled storage qubit nanomechanical resonator in a processing qubit superconducting circuit is provided that includes a phononic crystal resonator (PCR) film disposed on a substrate, where the PCR film includes a defect mode in a bandgap of the PCR film where a storage qubit is encoded, a pair of electrodes generate voltages within the PCR film, where the defect is dimensioned to support a unique electrical potential generated by a local mechanical phonon mode of the PCR film, where a unique resonance frequency that is dependent on the defect dimensions is output from the PCR film, a coupling capacitor that is coupled to the PCR film, where the coupling capacitor is disposed to receive the output unique resonance frequency, and a processing qubit, where the processing qubit is capacitively coupled to the PCR film by the coupling capacitor, where the storage qubits are connected to the processing qubits.
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公开(公告)号：US20240204386A1
公开(公告)日：2024-06-20
申请号：US18449349
申请日：2023-08-14
IPC分类号： H01P11/00 , G06N10/00 , H01B12/02 , H01P1/20 , H01P1/203 , H01P1/22 , H01P1/30 , H01P3/00 , H05K7/20
CPC分类号： H01P11/001 , G06N10/00 , H01B12/02 , H01P1/20 , H01P1/203 , H01P1/30 , H01P3/003 , H01P11/007 , H05K7/20372 , H01P1/222
摘要： An architecture for, and techniques for fabricating, a thermal decoupling device are provided. In some embodiments, thermal decoupling device can be included in a thermally decoupled cryogenic microwave filter. In some embodiments, the thermal decoupling device can comprise a dielectric material and a conductive line. The dielectric material can comprise a first channel that is separated from a second channel by a wall of the dielectric material. The conductive line can comprise a first segment and a second segment that are separated by the wall. The wall can facilitate propagation of a microwave signal between the first segment and the second segment and can reduce heat flow between the first segment and the second segment of the conductive line.
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公开(公告)号：US12008433B2
公开(公告)日：2024-06-11
申请号：US16967339
申请日：2019-08-07
申请人： Google LLC
发明人： Ryan Babbush , Ian David Kivlichan
摘要： Methods, systems and apparatus for performing quantum state preparation. In one aspect, a method includes the actions of defining a target quantum state of a quantum system, wherein time evolution of the quantum system is governed by a target Hamiltonian, and defining a total Hamiltonian that interpolates between an initial Hamiltonian and the target Hamiltonian, wherein the total Hamiltonian is equal to the initial Hamiltonian at an initial time and is equal to the target Hamiltonian at a final time; approximating the time evolution of the total Hamiltonian using a truncated linear combination of unitary simulations to generate a truncated time evolution operator; evolving a ground state of the initial Hamiltonian according to the truncated time evolution operator for a truncated number of time steps to generate an intermediate state; and variationally adjusting the intermediate state to determine a wavefunction that approximates the target quantum state of the quantum system.
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