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31.发明公开公开(公告)号：US20230409950A1
公开(公告)日：2023-12-21
申请号：US18202270
申请日：2023-05-25
Applicant: IONQ, INC. , Duke University
Inventor： Mingyu KANG , Qiyao LIANG , Ming LI , Yunseong NAM
Abstract: A method of using an ion trap quantum computer includes performing a first measurement of bright-state population of each ion in an ion chain, the each ion coupled to one of motional modes of the ion chain, while varying laser coupling frequency, computing mode frequency of the one of the motional mode based on the measured bright-state population in the first measurement, performing a second measurement of bright-state population of each ion in the ion chain, and computing coupling strength of the each ion and the one of the motional mode by fitting the bright-state population of the each ion measured in the second measurement to a value of the bright-state population computed based on the computed mode frequency of the one of the motional modes and non-zero temperature effect of the motional modes.
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32.发明公开公开(公告)号：US20230169381A1
公开(公告)日：2023-06-01
申请号：US18148670
申请日：2022-12-30
Applicant: IonQ, Inc. , University of Maryland, College Park
Inventor： Qingfeng WANG , Ming LI , Yunseong NAM
CPC classification number: G06N10/00 , G06F9/5094 , G06F30/20
Abstract: Aspects of the present disclosure describe a method including predicting a first set of ansatz terms and a first plurality of amplitudes associated with the first set of ansatz terms; minimizing energy of the system based on the first set of ansatz terms and the first plurality of amplitudes; computing perturbative corrections using one or more ansatz wavefunctions; determining whether energy of the system converges; and predicting, in response to determining that the energy of the system does not converge, a second set of ansatz terms and a second plurality of amplitudes associated with the second set of ansatz terms.
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公开(公告)号：US20230042892A1
公开(公告)日：2023-02-09
申请号：US17863787
申请日：2022-07-13
Applicant: IONQ, INC. , University of Maryland
Inventor： Qingfeng WANG , Yunseong NAM
Abstract: Aspects of the present disclosure describe a method including compressing and uncompressing redundant quantum information encoded in quantum computers; processing quantum information in the compressed space; and computing, in response to determining the ansatz terms, a set of optimal transformations.
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公开(公告)号：US20230029117A1
公开(公告)日：2023-01-26
申请号：US17945610
申请日：2022-09-15
Applicant: IONQ, INC.
Inventor： Yunseong NAM , Reinhold BLUMEL , Nikodem GRZESIAK
Abstract: A method of performing a computation using a quantum computer includes generating a first laser pulse and a second laser pulse to cause entanglement interaction between a first trapped ion and a second trapped ion of a plurality of trapped ions that are aligned in a first direction, each of the plurality of trapped ions having two frequency- separated states defining a qubit, and applying the generated first laser pulse to the first trapped ion and the generated second laser pulse to the second trapped ion. Generating the first laser pulse and the second laser pulse includes stabilizing the entanglement interaction between the first and second trapped ions against fluctuations in frequencies of collective motional modes of the plurality of trapped ions in a second direction that is perpendicular to the first direction.
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35.发明申请公开(公告)号：US20220414513A1
公开(公告)日：2022-12-29
申请号：US17841511
申请日：2022-06-15
Applicant: IONQ, INC. , University of Maryland
Inventor： Pradeep NIROULA , Yunseong NAM
Abstract: A method of performing computation using a hybrid quantum-classical computing system comprising a classical computer, a system controller, and a quantum processor includes identifying, by use of the classical computer, a molecular dynamics system to be simulated, computing, by use of the classical computer, multiple energies associated with particles of the molecular dynamics system as part of the simulation, based on the Ewald summation method, the computing of the multiple energies comprising partially offloading the computing of the multiple energies to the quantum processor, and outputting, by use of the classical computer, a physical behavior of the molecular dynamics system determined from the computed multiple energies.
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Patent Agency Ranking
公开(公告)号：US20220253739A1
公开(公告)日：2022-08-11
申请号：US17732871
申请日：2022-04-29
Applicant: IonQ, Inc. , University of Maryland, College Park , Duke University
Inventor： Jungsang KIM , Yunseong NAM , Christopher MONROE
Abstract: The disclosure describes various aspects of a practical implementation of multi-qubit gate architecture. A method is described that includes enabling ions in the ion trap having three energy levels, enabling a low-heating rate motional mode (e.g., zig-zag mode) at a ground state of motion with the ions in the ion trap; and performing a Cirac and Zoller (CZ) protocol using the low-heating rate motional mode as a motional state of the CZ protocol and one of the energy levels as an auxiliary state of the CZ protocol, where performing the CZ protocol includes implementing the multi-qubit gate. The method also includes performing one or more algorithms using the multi-qubit gate, including Grover's algorithm, Shor's factoring algorithm, quantum approximation optimization algorithm (QAOA), error correction algorithms, and quantum and Hamiltonian simulations. A corresponding system that supports the implementation of a multi-qubit gate architecture is also described.
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公开(公告)号：US20220101166A1
公开(公告)日：2022-03-31
申请号：US17477107
申请日：2021-09-16
Applicant: IONQ, INC.
Inventor： Reinhold BLUMEL , Nikodem GRZESIAK , Yunseong NAM
Abstract: Embodiments described herein are generally related to a method and a system for constructing and delivering a pulse to perform an entangling gate operation between two trapped ions during a quantum computation, and more specifically, to a method of demodulating and spline interpolating a pulse that can be practically implemented in the system while increasing the fidelity of the entangling gate operation, or the probability that at least two ions are in the intended qubit state(s) after performing the entangling gate operation between the two ions.
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38.发明申请公开(公告)号：US20200372392A1
公开(公告)日：2020-11-26
申请号：US16854043
申请日：2020-04-21
Applicant: IONQ, INC.
Inventor： Yunseong NAM , Reinhold BLUMEL , Nikodem GRZESIAK
IPC: G06N10/00
Abstract: A method of performing a computation using a quantum computer includes generating a plurality of laser pulses used to be individually applied to each of a plurality of trapped ions that are aligned in a first direction, each of the trapped ions having two frequency-separated states defining a qubit, and applying the generated plurality of laser pulses to the plurality of trapped ions to perform simultaneous pair-wise entangling gate operations on the plurality of trapped ions. Generating the plurality of laser pulses includes adjusting an amplitude value and a detuning frequency value of each of the plurality of laser pulses based on values of pair-wise entanglement interaction in the plurality of trapped ions that is to be caused by the plurality of laser pulses.
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公开(公告)号：US20200372389A1
公开(公告)日：2020-11-26
申请号：US16578137
申请日：2019-09-20
Applicant: IONQ, INC.
Inventor： Yunseong NAM , Reinhold BLUMEL , Nikodem GRZESIAK
IPC: G06N10/00
Abstract: A method of performing simultaneous entangling gate operations in a trapped-ion quantum computer includes selecting a gate duration value and a detuning frequency of pulses to be individually applied to a plurality of participating ions in a chain of trapped ions to simultaneously entangle a plurality of pairs of ions among the plurality of participating ions by one or more predetermined values of entanglement interaction, determining amplitudes of the pulses, based on the selected gate duration value, the selected detuning frequency, and the frequencies of the motional modes of the chain of trapped ions, generating the pulses having the determined amplitudes, and applying the generated pulses to the plurality of participating ions for the selected gate duration value. Each of the trapped ions in the chain has two frequency-separated states defining a qubit, and motional modes of the chain of trapped ions each have a distinct frequency.
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40.发明申请公开(公告)号：US20190258757A1
公开(公告)日：2019-08-22
申请号：US16275030
申请日：2019-02-13
Applicant: IonQ, Inc.
Inventor： Yunseong NAM , Dmitri MASLOV
Abstract: The disclosure describes various aspects of techniques for optimal fault-tolerant implementations of controlled-Za gates and Heisenberg interactions. Improvements in the implementation of the controlled-Za gate can be made by using a clean ancilla and in-circuit measurement. Various examples are described that depend on whether the implementation is with or without measurement and feedforward. The implementation of the Heisenberg interaction can leverage the improved controlled-Za gate implementation. These implementations can cut down significantly the implementation costs associated with fault-tolerant quantum computing systems.
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