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公开(公告)号：US20230213988A1
公开(公告)日：2023-07-06
申请号：US18148052
申请日：2022-12-29
Applicant: IonQ, Inc.
Inventor： Shantanu DEBNATH , Jason Hieu Van Nguyen , Peter Lukas Wilhelm Maunz , Kevin Antony Landsman , Hermann Uys
Abstract: A system and method is provided for use in the implementation and/or operation of quantum information processing (QIP) systems, and more particularly, to design or configure an optimal side-band cooling operation for trapped ions. A method is described that involves applying a first cooling operation on the trapped ion chain and subsequently applying a second cooling operation on the trapped ion chain that includes applying to each cooling ion in the trapped ion chain, as part of a side-band cooling pulse sequence, at least one analysis pulse followed by a corresponding batch with one or more side-band cooling pulses, wherein each analysis pulse is configured to determine a detuning and pulse duration of the one or more side-band cooling pulses of the corresponding batch. A quantum computer or QIP system is also described that enables the operation of the method described above.
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公开(公告)号：US20230120170A1
公开(公告)日：2023-04-20
申请号：US18047874
申请日：2022-10-19
Applicant: IonQ, Inc.
Inventor： Shantanu DEBNATH , Aleksey Blinov , Coleman Collins , Kenneth Wright , Neal C. Pisenti , Kristin M. Beck , Jwo-Sy Chen , Jason Hieu Van Nguyen , Kevin Antony Landsman , Hemann Uys , Matthew Keesan
Abstract: Systems and methods for use in the implementation and/or operation of quantum information processing (QIP) systems or quantum computers, and more particularly, to benchmark-driven automation for tuning quantum computers are described. A method includes identifying a set of quantum gates and a number of experimental shots to perform a benchmark algorithm for active stabilization of one or more observables of the set of quantum gates and executing the benchmarking algorithm based on the set of quantum gates and the number of experimental shots. Moreover, in response to the benchmarking algorithm being successful, executing an algorithm on the quantum computer, and in response to the benchmarking algorithm being unsuccessful, iterating the benchmarking algorithm by adjusting the set of quantum gates until the benchmarking algorithm is successful or a preset number of iterations is reached.
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公开(公告)号：US20200373917A1
公开(公告)日：2020-11-26
申请号：US16990108
申请日：2020-08-11
Applicant: IONQ, INC.
Inventor： Shantanu DEBNATH , Jason M. AMINI , Jwo-Sy CHEN , Neal PISENTI
IPC: H03K3/38 , G06N10/00 , H03K19/195
Abstract: A method of performing a computational process using a quantum computer includes generating a laser pulse sequence comprising a plurality of laser pulse segments used to perform an entangling gate operation on 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 trapped ions having two frequency-separated states defining a qubit, and applying the generated laser pulse sequence to the first and second trapped ions. Each of the plurality of laser pulse segments has a pulse shape with ramps formed using a spline at a start and an end of each of the plurality of laser pulse segments.
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公开(公告)号：US20240127091A1
公开(公告)日：2024-04-18
申请号：US18394560
申请日：2023-12-22
Applicant: IonQ, Inc.
Inventor： Shantanu DEBNATH
CPC classification number: G06N10/00 , H01J49/0072 , G06F1/20
Abstract: Aspects of the present disclosure describe techniques for fast cooling of ion motion in a long chain using local motional modes. For example, a method is described for cooling down ions in a chain of ions that includes performing a cooling down sequence in which phonons are removed from the ions in the chain of ions by exciting and de-exciting local motional modes associated with individual ions, wherein sideband transitions that are part of the cooling down sequence are driven faster for the local motional modes than for collective motional modes for the same chain of ions; and completing the cooling down sequence when the local motional modes reach a ground state. A corresponding system and computer-readable storage medium for fast cooling of ion motion in a long chain using local motional modes are also described.
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公开(公告)号：US20230304927A1
公开(公告)日：2023-09-28
申请号：US18147311
申请日：2022-12-28
Applicant: IonQ, Inc.
Inventor： Jason Hieu Van NGUYEN , Kevin Antony LANDSMAN , Hermann UYS , Shantanu DEBNATH , Peter Lukas Wilhelm MAUNZ
CPC classification number: G01N21/39 , G06N10/20 , G06N10/40 , G06N10/60 , G01N2021/393
Abstract: Aspects of the present disclosure relate generally to systems and methods for use in the implementation and/or operation of quantum information processing (QIP) systems, and more particularly, to a fast single-mode spectroscopy technique that may be used in trapped-ion QIP systems. A method is described that includes performing a first measurement scan (full scan) across all motional modes of an ion chain in a trap followed by a second measurement scan on a single motional mode of the motional modes (single-mode scan). The second measurement scan determines a frequency shift associated with the single motional mode, which is applied to adjust the frequencies of all the motional modes. An implementation of two-qubit gates for quantum computations is based on the adjusted frequencies. A quantum computer or QIP system is also described that is configured to implement and perform the method described above.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20240353679A1
公开(公告)日：2024-10-24
申请号：US18640530
申请日：2024-04-19
Applicant: IonQ, Inc.
Inventor： Shantanu DEBNATH , Tan LIU
CPC classification number: G02B27/0025 , G06T7/0002 , G06T7/80 , G06T2207/30168
Abstract: Aspects of the present disclosure relate generally to systems and methods for use in the implementation and/or operation of quantum information processing (QIP) systems, and more particularly, to calibrate compact optical imaging systems that use single atom imaging. A QIP system includes an optical system including an optical relay that receives a beam of light, a housing, and at least one aperture plate. The optical relay includes at least one lens, at least one mirror to fold the beam of light, and a camera sensor to capture at least one image of the beam of light. The housing accommodates the optical relay and includes a slot mechanically referenced to at least one of the lens(es) and the mirror(s). The aperture plate is receivable in the slot. The aperture plate includes an aperture alignable with an optical axis of the optical relay when the aperture plate is received in the slot.
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公开(公告)号：US20230162074A1
公开(公告)日：2023-05-25
申请号：US17969258
申请日：2022-10-19
Applicant: University of Maryland, College Park , IonQ, Inc.
Inventor： Shantanu DEBNATH , Norbert M. LINKE , Christopher R. MONROE , Caroline FIGGATT
Abstract: Aspects of the present disclosure describe techniques for controlling quantum states of ions in an ion chain for a quantum operation. For example, a method is described that includes providing, from a first direction, a global optical beam to the ions in the ion chain, and providing, from a second direction different from the first direction, to each ion in a subset of the ions in the ion chain, a respective addressing optical beam. The method further includes dynamically controlling each of the addressing optical beams being provided by using a respective channel in a multi-channel acousto-optic modulator (AOM) to implement, with the ion chain, one or more quantum gates in a sequence of quantum gates of the quantum operation. Aspects of a quantum information processing (QIP) system that includes the multi-channel AOM for performing the method are also described.
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公开(公告)号：US20210133616A1
公开(公告)日：2021-05-06
申请号：US17069120
申请日：2020-10-13
Applicant: IonQ, Inc.
Inventor： Shantanu DEBNATH
Abstract: Aspects of the present disclosure describe techniques for fast cooling of ion motion in a long chain using local motional modes. For example, a method is described for cooling down ions in a chain of ions that includes performing a cooling down sequence in which phonons are removed from the ions in the chain of ions by exciting and de-exciting local motional modes associated with individual ions, wherein sideband transitions that are part of the cooling down sequence are driven faster for the local motional modes than for collective motional modes for the same chain of ions; and completing the cooling down sequence when the local motional modes reach a ground state. A corresponding system and computer-readable storage medium for fast cooling of ion motion in a long chain using local motional modes are also described.
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公开(公告)号：US20240110876A1
公开(公告)日：2024-04-04
申请号：US18540391
申请日：2023-12-14
Applicant: IonQ, Inc.
Inventor： Shantanu DEBNATH , Vandiver CHAPLIN
Abstract: Aspects of the present disclosure relate generally to systems and methods for use in the implementation and/or operation of quantum information processing (QIP) systems, and more particularly, to the correction of light-shift effects in trapped-ion quantum gates. Techniques are described for light-shift correction of single qubit gates when the gates are implemented using counter-propagating Raman laser beams and when the gates are implemented using co-propagating Raman laser beams. Moreover, techniques are also described for light-shift correction of two-qubit gates.
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公开(公告)号：US20230132301A1
公开(公告)日：2023-04-27
申请号：US18048300
申请日：2022-10-20
Applicant: IonQ, Inc.
Inventor： Shantanu DEBNATH , Vandiver CHAPLIN
Abstract: Aspects of the present disclosure relate generally to systems and methods for use in the implementation and/or operation of quantum information processing (QIP) systems, and more particularly, to the correction of light-shift effects in trapped-ion quantum gates. Techniques are described for light-shift correction of single qubit gates when the gates are implemented using counter-propagating Raman laser beams and when the gates are implemented using co-propagating Raman laser beams. Moreover, techniques are also described for light-shift correction of two-qubit gates.
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