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1.发明授权公开(公告)号：US12086691B2
公开(公告)日：2024-09-10
申请号：US18181393
申请日：2023-03-09
Applicant: IonQ, Inc.
Inventor： Jwo-Sy Chen , Neal Pisenti , Yunseong Nam
Abstract: The disclosure describes various techniques to control of small angle Mølmer-Sørensen (MS) gates and to handle asymmetric errors. A technique is described that implements a two-qubit calibration circuit with two MS gates, where a parameter θ represents an amount of entanglement of the MS gate. The calibration circuit is run for several values of θ to measure observed parity signals that are direct measurements of the values of θ. Calibration information is generated that describes the relationship between θ and the parity signals, and such calibration information is then provided to arbitrarily calibrate one or more MS gates in a quantum simulation. Another technique is described for using the calibration information in quantum simulations, including for quantum chemistry simulations. Yet another technique is described for handling system-based asymmetric errors in the measurements of different qubit states in different types of quantum circuits, including, for example, the calibration circuit mentioned above.
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2.发明授权公开(公告)号：US12237641B2
公开(公告)日：2025-02-25
申请号：US18506744
申请日：2023-11-10
Applicant: IonQ, Inc.
Inventor： Jonathan Albert Mizrahi , Neal Pisenti
Abstract: Aspects of the present disclosure describe techniques for fast stabilization of multiple controller beams with continuous integrating filter. For example, a method is described for intensity stabilization of laser beams (e.g., ion controller beams) in a trapped ion system, where the method includes applying a linear array of laser beams to respective ions in a linear array of ions in a trap, performing, in response to the laser beams being applied, parallel measurements on the ions, the parallel measurements including multiple, separate measurements on each of the ions to identify fluctuations in intensity in the respective laser beams at each ion, and adjusting the intensity of one or more of the laser beams in response to fluctuations being identified from the parallel measurements. A corresponding system for intensity stabilization of laser beams in a trapped ion system is also described.
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公开(公告)号：US11152925B2
公开(公告)日：2021-10-19
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: G06N99/00 , 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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4.发明公开公开(公告)号：US20240185114A1
公开(公告)日：2024-06-06
申请号：US18543790
申请日：2023-12-18
Applicant: IonQ, Inc.
Inventor： Jwo-Sy Chen , Neal Pisenti , Yunseong Nam
CPC classification number: G06N10/70 , G06F11/1004 , G06F30/20 , G06N10/20 , G06N10/40
Abstract: The disclosure describes various techniques to control of small angle Mølmer-Sørensen (MS) gates and to handle asymmetric errors. A technique is described for handling asymmetric errors in quantum information processing (QIP) systems. An exemplary method includes implementing a quantum circuit in the QIP system that has first and second qubit lines, with a first qubit state having a greater measurement error than a second qubit state; swapping the roles of the first and second qubit states at a quantum circuit level in response to at least one of the first qubit line and the second qubit line being expected to be at the first qubit state at a measurement; and enabling a quantum simulation using the quantum circuit with the first and second qubit states reassigned in at least one of the first qubit line and the second qubit line after the swapping of the respective roles.
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5.发明授权公开(公告)号：US11855407B2
公开(公告)日：2023-12-26
申请号：US16995642
申请日：2020-08-17
Applicant: IonQ, Inc.
Inventor： Jonathan Albert Mizrahi , Neal Pisenti
CPC classification number: H01S3/1306 , H01S3/1307 , H01S3/1308 , H01S3/09707
Abstract: Aspects of the present disclosure describe techniques for fast stabilization of multiple controller beams with continuous integrating filter. For example, a method is described for intensity stabilization of laser beams (e.g., ion controller beams) in a trapped ion system, where the method includes applying a linear array of laser beams to respective ions in a linear array of ions in a trap, performing, in response to the laser beams being applied, parallel measurements on the ions, the parallel measurements including multiple, separate measurements on each of the ions to identify fluctuations in intensity in the respective laser beams at each ion, and adjusting the intensity of one or more of the laser beams in response to fluctuations being identified from the parallel measurements. A corresponding system for intensity stabilization of laser beams in a trapped ion system is also described.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20230222373A1
公开(公告)日：2023-07-13
申请号：US18181393
申请日：2023-03-09
Applicant: IonQ, Inc.
Inventor： Jwo-Sy CHEN , Neal Pisenti , Yunseong Nam
Abstract: The disclosure describes various techniques to control of small angle Mølmer-Sørensen (MS) gates and to handle asymmetric errors. A technique is described that implements a two-qubit calibration circuit with two MS gates, where a parameter θ represents an amount of entanglement of the MS gate. The calibration circuit is run for several values of θ to measure observed parity signals that are direct measurements of the values of θ. Calibration information is generated that describes the relationship between θ and the parity signals, and such calibration information is then provided to arbitrarily calibrate one or more MS gates in a quantum simulation. Another technique is described for using the calibration information in quantum simulations, including for quantum chemistry simulations. Yet another technique is described for handling system-based asymmetric errors in the measurements of different qubit states in different types of quantum circuits, including, for example, the calibration circuit mentioned above.
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公开(公告)号：US10790807B1
公开(公告)日：2020-09-29
申请号：US16817482
申请日：2020-03-12
Applicant: IONQ, INC.
Inventor： Shantanu Debnath , Jason M. Amini , Jwo-Sy Chen , Neal Pisenti
IPC: G06N99/00 , 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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8.发明授权公开(公告)号：US11886956B2
公开(公告)日：2024-01-30
申请号：US17887003
申请日：2022-08-12
Applicant: IonQ, Inc.
Inventor： Jwo-Sy Chen , Neal Pisenti , Yunseong Nam
CPC classification number: G06N10/00 , G06F11/1004 , G06F30/20 , G06N10/20 , G06N10/40
Abstract: The disclosure describes various techniques to control of small angle Mølmer-Sørensen (MS) gates and to handle asymmetric errors. A technique is described for handling asymmetric errors in quantum information processing (QIP) systems. An exemplary method includes implementing a quantum circuit in the QIP system that has first and second qubit lines, with a first qubit state having a greater measurement error than a second qubit state; swapping the roles of the first and second qubit states at a quantum circuit level in response to at least one of the first qubit line and the second qubit line being expected to be at the first qubit state at a measurement; and enabling a quantum simulation using the quantum circuit with the first and second qubit states reassigned in at least one of the first qubit line and the second qubit line after the swapping of the respective roles.
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9.发明授权公开(公告)号：US11645568B2
公开(公告)日：2023-05-09
申请号：US16708207
申请日：2019-12-09
Applicant: IonQ, Inc.
Inventor： Jwo-Sy Chen , Neal Pisenti , Yunseong Nam
CPC classification number: G06N10/00 , G06F11/1004 , G06F30/20
Abstract: The disclosure describes various techniques to control of small angle Mølmer-Sørensen (MS) gates and to handle asymmetric errors. A technique is described that implements a two-qubit calibration circuit with two MS gates, where a parameter θ represents an amount of entanglement of the MS gate. The calibration circuit is run for several values of θ to measure observed parity signals that are direct measurements of the values of θ. Calibration information is generated that describes the relationship between θ and the parity signals, and such calibration information is then provided to arbitrarily calibrate one or more MS gates in a quantum simulation. Another technique is described for using the calibration information in quantum simulations, including for quantum chemistry simulations. Yet another technique is described for handling system-based asymmetric errors in the measurements of different qubit states in different types of quantum circuits, including, for example, the calibration circuit mentioned above.
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公开(公告)号：US11561148B2
公开(公告)日：2023-01-24
申请号：US17072916
申请日：2020-10-16
Applicant: IonQ, Inc.
Inventor： Neal Pisenti , Kenneth Wright , Jason Madjdi Amini , Jwo-Sy Chen
Abstract: Aspects of the present disclosure describe techniques for measuring collision rate with spatial filtering of scattered light. For example, a method for characterizing vacuum in a chamber is described that includes generating, inside the chamber, a potential well having a single, shallow potential region within which an ion is trapped, the shallow potential region having a lowest potential of the potential well, optically monitoring the ion within the potential well, detecting, based on the optically monitoring, a movement of the ion away from the shallow potential region in response to a collision with a background gas, and determining a pressure inside the chamber based on a rate of detected movements of the ion.
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