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

IPC: G06F1/20 ,  G06N7/01 ,  G06N10/40

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.

公开(公告)号：US12231185B2

公开(公告)日：2025-02-18

申请号：US18449516

申请日：2023-08-14

Applicant: IonQ, Inc.

Inventor： Kristin Marie Beck ,  Vandiver Chaplin

IPC: H04B3/32 ,  H04B10/2575

Abstract: Aspects of the present disclosure describe controlling coherent crosstalk errors in multi-channel acousto-optic modulators (AOMs). A method, an AOM system, and a quantum information processing (QIP) system are described in which a separate radio-frequency (RF) signal is generated and applied to each of multiple channels of a multi-channel AOM using an arbitrary waveform generator (AWG) to turn on each of those channels, where each channel that is turned on interacts with one or more of the remaining channels that are not turned on to cause a combined crosstalk effect on those remaining channels. Each channel has a single respective AWG. Moreover, a correcting RF signal is generated and applied to the one or more of the remaining channels using a respective AWG to produce an acoustic wave that corrects for the combined crosstalk effect such that the one or more of the remaining channels are not unintentionally turned on.

公开(公告)号：US11764828B2

公开(公告)日：2023-09-19

申请号：US17349457

申请日：2021-06-16

Applicant: IONQ, INC.

Inventor： Kristin Marie Beck ,  Vandiver Chaplin

IPC: H04B10/2575 ,  H04B3/32

CPC classification number: H04B3/32 ,  H04B10/2575

Abstract: Aspects of the present disclosure describe controlling coherent crosstalk errors in multi-channel acousto-optic modulators (AOMs). A method, an AOM system, and a quantum information processing (QIP) system are described in which a separate radio-frequency (RF) signal is generated and applied to each of multiple channels of a multi-channel AOM using an arbitrary waveform generator (AWG) to turn on each of those channels, where each channel that is turned on interacts with one or more of the remaining channels that are not turned on to cause a combined crosstalk effect on those remaining channels. Each channel has a single respective AWG. Moreover, a correcting RF signal is generated and applied to the one or more of the remaining channels using a respective AWG to produce an acoustic wave that corrects for the combined crosstalk effect such that the one or more of the remaining channels are not unintentionally turned on.