公开(公告)号：US20230403044A1

公开(公告)日：2023-12-14

申请号：US18449516

申请日：2023-08-14

Applicant: IonQ, Inc.

Inventor： Kristin Marie BECK ,  Vandiver Chaplin

IPC: H04B3/32 ,  H04B10/2575

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.

公开(公告)号：US20210406756A1

公开(公告)日：2021-12-30

申请号：US17357323

申请日：2021-06-24

Applicant: IonQ, Inc.

Inventor： Jason Madjdi AMINI ,  Kenneth WRIGHT ,  Kristin Marie BECK

IPC: G06N10/00 ,  G06N7/00

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：US20210399763A1

公开(公告)日：2021-12-23

申请号：US17349457

申请日：2021-06-16

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：US20240403678A1

公开(公告)日：2024-12-05

申请号：US17477148

申请日：2021-09-16

Applicant: IONQ, INC.

Inventor： Ming LI ,  Kenneth WRIGHT ,  Neal C. PISENTI ,  Kristin Marie BECK ,  Jason Hieu Van NGUYEN ,  Yunseong NAM

IPC: G06N10/20 ,  G06N10/40 ,  G06N10/70

Abstract: A method of performing a quantum gate operation in an ion trap quantum computing system includes identifying one or more error mechanisms that cause a quantum computational error in a quantum gate operation on a first trapped ion of an ion chain comprising a plurality of trapped ions, wherein the quantum gate operation is performed by applying a first Raman laser beam and a second Raman laser beam, computing a first amplitude of the first Raman laser beam, and a second amplitude of the second Raman laser beam such that the effect of the identified one or more error mechanisms is accounted for, and applying the first Raman laser beam having the computed first amplitude and the second Raman laser beam having the computed second amplitude on the first trapped ion to perform the quantum gate operation on the first trapped ion.

公开(公告)号：US20230039901A1

公开(公告)日：2023-02-09

申请号：US17880399

申请日：2022-08-03

Applicant: IonQ, Inc.

Inventor： Kevin Antony LANDSMAN ,  Aleksey BLINOV ,  Shantanu DEBNATH ,  Vandiver CHAPLIN ,  Kristin Marie BECK ,  Andrew Maps DUCORE ,  Melissa JAMESON ,  Jason Hieu Van NGUYEN ,  Felix TRIPIER

IPC: G06N10/40 ,  G06N5/00

Abstract: Techniques to address the problem of having micromotion and stray fields affect trapped ions and the operation of QIP systems based on trapped ions are described. For example, one technique or approach may involve collecting scattered photons off the ions using a resonant or near-resonant oscillating electric field (e.g., a laser beam or a microwave source) with some projection in the axis or direction of micromotion that one wishes to reduce. Another technique or approach may include raising and lowering the trapping potentials to see how the ion position changes. The information collected from these techniques may be used to provide appropriate adjustments. Accordingly, the present disclosure describes methods, scripts, or techniques that minimize the effects of micromotion.