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公开(公告)号：US11853849B2
公开(公告)日：2023-12-26
申请号：US17449578
申请日：2021-09-30
Applicant: IonQ, Inc.
Inventor： Jason Madjdi Amini
CPC classification number: G06N10/00 , F04B15/08 , F04B37/08 , F25D19/006 , B82Y10/00 , F04B2015/081
Abstract: The disclosure describes various aspects of a vibrationally isolated cryogenic shield for local high-quality vacuum. More specifically, the disclosure describes a cryogenic vacuum system replicated in a small volume in a mostly room temperature ultra-high vacuum (UHV) system by capping the volume with a suspended cryogenic cold finger coated with a high surface area sorption material to produce a localized extreme high vacuum (XHV) or near-XHV region. The system is designed to ensure that all paths from outgassing materials to the control volume, including multiple bounce paths off other warm surfaces, require at least one bounce off of the high surface area sorption material on the cold finger. The outgassing materials can therefore be pumped before reaching the control volume. To minimize vibrations, the cold finger is only loosely, mechanically connected to the rest of the chamber, and the isolated along with the cryogenic system via soft vacuum bellows.
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公开(公告)号：US11334811B2
公开(公告)日：2022-05-17
申请号：US16450779
申请日：2019-06-24
Applicant: IonQ, Inc.
Inventor： Jason Madjdi Amini
IPC: G06N10/00
Abstract: The disclosure describes various aspects of techniques for cooling a chain of ions to near the combined ground state that does not grow with the number of ions in the chain. By addressing each ion individually and using each ion to cool a different motional mode, it is possible to cool the motional modes concurrently. In an example, a third of the total motional modes can be cooled at the same time. In an aspect, the techniques include generating a sideband cooling laser beam for each ion in the ion chain, concurrently cooling two or more motional modes associated with the ions in the ion chain using the respective sideband cooling laser beam until each of the two or more motional modes reaches a motional ground state, and performing a quantum computation using the ion chain after the two or more motional modes have reached the motional ground state.
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公开(公告)号：US11033981B2
公开(公告)日：2021-06-15
申请号：US16515508
申请日：2019-07-18
Applicant: University of Maryland, College Park , IonQ, Inc.
Inventor： Jason Madjdi Amini , Jonathan Mizrahi , Kai Hudek , Michael Goldman
IPC: B23K26/064 , G06N10/00 , G02F1/33 , B82Y10/00
Abstract: The disclosure describes various aspects of acousto-optic modulator (AOM) configurations for quantum processing. A method is described including generating, by a first AOM from a laser beam, first and second diffracted laser beams at different angles based on first and second radio frequency (RF) tones. An optical component focuses the diffracted laser beams onto a second AOM, which generates third and fourth diffracted laser beams based on the first RF tone and a third RF tone and the second RF tone and a fourth RF tone respectively, wherein the third and fourth diffracted laser beams are substantially parallel when incident on a respective ion in a chain of ions in a trap. Quantum information in the ion is controlled to perform quantum processing based on the third and fourth diffracted laser beams. Another method is described including generating, by an AOM, a small polarization rotation of an undiffracted laser beam.
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Patent Agency Ranking
公开(公告)号：US12265433B2
公开(公告)日：2025-04-01
申请号：US17357323
申请日：2021-06-24
Applicant: IonQ, Inc.
Inventor： Jason Madjdi Amini , Kenneth Wright , Kristin Marie Beck
Abstract: Aspects of the present disclosure describe techniques for cooling motional states in an ion trap for quantum computers. In an aspect, a method includes performing Doppler cooling and sideband cooling to sweep motional states associated with a motional mode to a zero motional state; applying a gate interaction on a red sideband; detecting, a population of non-zero motional states of the motional mode that remains after performing the Doppler cooling and the sideband cooling; and removing at least part of the population. In another aspect, a method includes performing a Doppler cooling; applying a gate interaction on a red sideband; detecting whether a population of non-zero motional states of the motional mode remains after performing the Doppler cooling; and redistributing the population of the non-zero motional states by Doppler cooling when a population is detected. A quantum information processing (QIP) system that performs these methods is also described.
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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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公开(公告)号：US11373852B2
公开(公告)日：2022-06-28
申请号：US16909669
申请日：2020-06-23
Applicant: IonQ, Inc.
Inventor： Jonathan Albert Mizrahi , Kenneth Wright , Jason Madjdi Amini
Abstract: Aspects of the present disclosure describe techniques for mitigating charging on optical windows. For example, a device for mitigating charges inside a chamber of a trapped ion system is described that includes an array of parallel wires formed from a single, conductive plate by cutting elongated gaps through an entire thickness of the conductive plate that separate the wires, an outer portion of the conductive plate to which the wires are attached is configured to position the wires to run parallel to one or more trapped ions in the chamber and to position the wires between a dielectric component of the chamber and the one or more trapped ions. A chamber with such an array of parallel wires and a method of using such an array of parallel wires are also described.
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公开(公告)号：US11205133B2
公开(公告)日：2021-12-21
申请号：US16242328
申请日：2019-01-08
Applicant: IonQ, Inc.
Inventor： Jason Madjdi Amini
Abstract: Aspects of a vibrationally isolated cryogenic shield for local high-quality vacuum are described. More specifically, a cryogenic vacuum system is described that is replicated in a small volume in a mostly room temperature ultra-high vacuum (UHV) system by capping the volume with a suspended cryogenic cold finger coated with a high surface area sorption material to produce a localized extreme high vacuum (XHV) or near-XHV region. The system ensures that paths from outgassing materials to the control volume, including bounce paths off other warm surfaces, require at least one bounce off of the high surface area sorption material on the cold finger. The outgassing materials can be pumped before reaching the control volume. To minimize vibrations, the cold finger is only loosely, mechanically connected to the rest of the chamber, and isolated along with the cryogenic system via soft vacuum bellows.
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公开(公告)号：US20190220770A1
公开(公告)日：2019-07-18
申请号：US16242328
申请日：2019-01-08
Applicant: IonQ, Inc.
Inventor： Jason Madjdi Amini
Abstract: The disclosure describes various aspects of a vibrationally isolated cryogenic shield for local high-quality vacuum. More specifically, the disclosure describes a cryogenic vacuum system replicated in a small volume in a mostly room temperature ultra-high vacuum (UHV) system by capping the volume with a suspended cryogenic cold finger coated with a high surface area sorption material to produce a localized extreme high vacuum (XHV) or near-XHV region. The system is designed to ensure that all paths from outgassing materials to the control volume, including multiple bounce paths off other warm surfaces, require at least one bounce off of the high surface area sorption material on the cold finger. The outgassing materials can therefore be pumped before reaching the control volume. To minimize vibrations, the cold finger is only loosely, mechanically connected to the rest of the chamber, and the isolated along with the cryogenic system via soft vacuum bellows.
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