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公开(公告)号：US11121301B1
公开(公告)日：2021-09-14
申请号：US16012708
申请日：2018-06-19
申请人： Rigetti & Co, Inc.
发明人： Jayss Daniel Marshall , Chih-Yang Li , Biswajit Sur , Nagesh Vodrahalli , Mehrnoosh Vahidpour , William Austin O'Brien, IV , Andrew Joseph Bestwick , Chad Tyler Rigetti , James Russell Renzas
摘要： In a general aspect, an integrated quantum circuit includes a first substrate and a second substrate. The first substrate includes a first surface and a recess formed in the first substrate along the first surface. The recess has a recess surface and is configured to enclose a quantum circuit element. The first substrate includes a first electrically-conductive layer disposed on the first surface and covering at least a portion of the recess surface. The first electrically-conductive layer includes a first superconducting material. The second substrate includes a second surface and a quantum circuit element. The second substrate includes a second electrically-conductive layer on the second surface that includes a second superconducting material. The first substrate is adjacent the second substrate to enclose the quantum circuit device within the recess. The first electrically-conductive layer of the first substrate is electrically-coupled to the second electrically-coupled layer of the second substrate.
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公开(公告)号：US20200280316A1
公开(公告)日：2020-09-03
申请号：US16783603
申请日：2020-02-06
申请人： Rigetti & Co, Inc.
IPC分类号： H03K19/195 , G06N10/00
摘要： In a general aspect, a qubit device includes two circuit loops. In some aspects, a first circuit loop includes a first Josephson junction, a second circuit loop includes a second Josephson junction, and the first and second loops are configured to receive a magnetic flux that defines a transition frequency of a qubit device. In some aspects, a quantum integrated circuit includes an inductor connected between a first circuit node and a second circuit node; the first Josephson junction connected in parallel with the inductor between the first circuit node and the second circuit node; and the second Josephson junction connected in parallel with the inductor between the first circuit node and the second circuit node.
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公开(公告)号：US20200050958A1
公开(公告)日：2020-02-13
申请号：US16390964
申请日：2019-04-22
申请人： Rigetti & Co, Inc.
发明人： Benjamin Jacob Bloom , Shane Arthur Caldwell , Michael James Curtis , Matthew J. Reagor , Chad Tyler Rigetti , Eyob A. Sete , William J. Zeng , Peter Jonathan Karalekas , Nikolas Anton Tezak , Nasser Alidoust
IPC分类号： G06N10/00 , H03K19/195
摘要： In a general aspect, calibration is performed in a quantum computing system. In some cases, domains of a quantum computing system are identified, where the domains include respective domain control subsystems and respective subsets of quantum circuit devices in a quantum processor of the quantum computing system. Sets of measurements are obtained from one of the domains and stored in memory. Device characteristics of the quantum circuit devices of the domain are obtained based on the set of measurements, and the device characteristics are stored in a memory of the control system. Quantum logic control parameters for the subset of quantum circuit devices of the domain are obtained based on the set of measurements and stored in memory.
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公开(公告)号：US10332024B2
公开(公告)日：2019-06-25
申请号：US15902739
申请日：2018-02-22
申请人： Rigetti & Co., Inc.
IPC分类号： G06N10/00 , G06N5/00 , H03K19/195 , G06F15/82 , G01R33/035 , H01L39/22 , G06F17/21 , H01L27/18 , G06F17/50
摘要： In a general aspect, a superconducting quantum circuit system is modeled. In some aspects, a graph representing a quantum circuit system is generated. The graph includes vertices and edges; the edges represent circuit elements of the quantum circuit system, and the vertices represent physical connections between the circuit elements. Inverse inductances, conductances, capacitances, and junction inverse inductances are assigned to respective edges of the graph based on a lumped-element approximation of the quantum circuit system. A coordinate system is determined based on the graph, and a matrix representation of the system is determined based on the coordinate system. A Hamiltonian for the quantum circuit system is determined using the matrix representation, and the quantum circuit system is simulated based on the Hamiltonian.
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公开(公告)号：US10255555B2
公开(公告)日：2019-04-09
申请号：US15348226
申请日：2016-11-10
申请人： RIGETTI & CO., INC.
发明人： Michael J. Curtis , William J. Zeng , Eyob A. Sete
摘要： In a general aspect, a quantum logic control sequence is generated for a quantum information processor. In some aspects, a quantum computation to be performed by a quantum information processor is identified. The quantum information processor includes data qubits and is configured to apply entangling quantum logic operations to respective pairs of the data qubits. A graph representing the quantum information processor is defined. The graph includes vertices and edges; the vertices represent the data qubits, and the edges represent the entangling quantum logic operations. A quantum logic control sequence is generated based on the graph. The quantum logic control sequence includes a sequence of quantum logic operations configured to perform the quantum computation when executed by the quantum information processor.
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公开(公告)号：US10127499B1
公开(公告)日：2018-11-13
申请号：US14822317
申请日：2015-08-10
申请人： Rigetti & Co., Inc.
摘要： In some aspects, a heterogeneous computing system includes a quantum processor unit and a classical processor unit. In some instances, variables defined by a computer program are stored in a classical memory in the heterogeneous computing system. The computer program is executed in the heterogeneous computing system by operation of the quantum processor unit and the classical processor unit. Instructions are generated for the quantum processor by a host processor unit based on values of the variables stored in the classical memory. The instructions are configured to cause the quantum processor unit to perform a data processing task defined by the computer program. The values of the variables are updated in the classical memory based on output values generated by the quantum processor unit. The classical processor unit processes the updated values of the variables.
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公开(公告)号：US20180260732A1
公开(公告)日：2018-09-13
申请号：US15916367
申请日：2018-03-09
申请人： Rigetti & Co, Inc.
发明人： Benjamin Jacob Bloom , Shane Arthur Caldwell , Michael James Curtis , Matthew J. Reagor , Chad Tyler Rigetti , Eyob A. Sete , William J. Zeng , Peter Jonathan Karalekas , Nikolas Anton Tezak , Nasser Alidoust
IPC分类号： G06N99/00 , H03K19/195
CPC分类号： G06N99/002 , H03K19/195
摘要： In a general aspect, calibration is performed in a quantum computing system. In some cases, domains of a quantum computing system are identified, where the domains include respective domain control subsystems and respective subsets of quantum circuit devices in a quantum processor of the quantum computing system. Sets of measurements are obtained from one of the domains and stored in memory. Device characteristics of the quantum circuit devices of the domain are obtained based on the set of measurements, and the device characteristics are stored in a memory of the control system. Quantum logic control parameters for the subset of quantum circuit devices of the domain are obtained based on the set of measurements and stored in memory.
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8.发明授权公开(公告)号：US09979400B1
公开(公告)日：2018-05-22
申请号：US15335846
申请日：2016-10-27
申请人： RIGETTI & CO., INC.
IPC分类号： H03K19/195 , G06N99/00
CPC分类号： H03K19/195 , G06N99/002
摘要： In a general aspect, control of a quantum superconducting circuit is analyzed. In some implementation, a parameter set for a control signal for a superconducting quantum circuit is received. The parameters set can include initial voltage amplitudes for respective time segments of the control signal. A first subset of time segments is selected for improving a quality measure of a quantum logic operation produced by delivery of the control signal in the superconducting quantum circuit. New voltage amplitudes are calculated for one or more segments in the first subset, such that the new voltage amplitudes improve the quality measure. The parameter set is updated to include the new voltage amplitudes for the first subset while preserving the initial voltage amplitudes for a second subset of the time segments.
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公开(公告)号：US11494681B1
公开(公告)日：2022-11-08
申请号：US16219694
申请日：2018-12-13
申请人： Rigetti & Co, Inc.
摘要： A compiler for a gate-based superconducting quantum computer compiles hybrid classical/quantum algorithms for quantum processing cells with different configurations. The compiler inputs the algorithm and outputs code in a target language executable by a quantum processing cell of a quantum processing system that can execute the algorithm. The compiler includes various functionality, such as: parsing, analyzing control flows, addressing, compressing, and translating. The compiler optimizes algorithms in various manners using the functionality. Some optimizations include addressing efficiently, compressing based on simulations, and translating for efficient execution of parametric functions. The compiler may function in the environment of a cloud quantum computing system. The cloud quantum computing system may receive algorithms from remote access nodes for execution on local classical and quantum computing systems.
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公开(公告)号：US20210406752A1
公开(公告)日：2021-12-30
申请号：US17228290
申请日：2021-04-12
申请人： Rigetti & Co, Inc.
摘要： In a general aspect, user requests for access distributed quantum computing resources in a distributed quantum computing system are managed. In a general aspect, a job request for accessing a quantum computing resource is received. The job request includes a user id and a program. On authentication of a user associated with the job request, a job identifier is assigned to the job request, and a particular quantum computing resource is selected for the job request. The job request is individualized based on user permissions and pushed onto a queue to be processed for execution by the quantum computing resource.
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