Optimal control of mirror pulses for cold-atom interferometry
Optimal control of mirror pulses for cold-atom interferometry
Atom matterwave interferometry requires mirror and beamsplitter pulses that are robust to inhomogeneities in field intensity, magnetic environment, atom velocity and Zeeman sub-state. We present theoretical results which show that pulse shapes determined using quantum control methods can significantly improve interferometer performance by allowing broader atom distributions, larger interferometer areas and higher contrast. We have applied gradient ascent pulse engineering (GRAPE) to optimise the design of phase-modulated mirror pulses for a Mach-Zehnder light-pulse atom interferometer, with the aim of increasing fringe contrast when averaged over atoms with an experimentally relevant range of velocities, beam intensities, and Zeeman states. Pulses were found to be highly robust to variations in detuning and coupling strength, and offer a clear improvement in robustness over the best established composite pulses. The peak mirror fidelity in a cloud of ∼ 80 µK 85Rb atoms is predicted to be improved by a factor of 2 compared with standard rectangular π pulses.
1-9
Saywell, Jack Cameron
da7a642a-ed67-4bd0-8959-e4c2874a8e67
Kuprov, Ilya
bb07f28a-5038-4524-8146-e3fc8344c065
Goodwin, David
349b642d-bc15-4a8d-b1d7-98691a39e069
Carey, Max
c2b2911d-e3a9-4537-b16e-9bbfd3b68c6c
Freegarde, Timothy
01a5f53b-d406-44fb-a166-d8da9128ea7d
August 2018
Saywell, Jack Cameron
da7a642a-ed67-4bd0-8959-e4c2874a8e67
Kuprov, Ilya
bb07f28a-5038-4524-8146-e3fc8344c065
Goodwin, David
349b642d-bc15-4a8d-b1d7-98691a39e069
Carey, Max
c2b2911d-e3a9-4537-b16e-9bbfd3b68c6c
Freegarde, Timothy
01a5f53b-d406-44fb-a166-d8da9128ea7d
Saywell, Jack Cameron, Kuprov, Ilya, Goodwin, David, Carey, Max and Freegarde, Timothy
(2018)
Optimal control of mirror pulses for cold-atom interferometry.
Physical Review A, 98, , [023625].
(doi:10.1103/PhysRevA.98.023625).
Abstract
Atom matterwave interferometry requires mirror and beamsplitter pulses that are robust to inhomogeneities in field intensity, magnetic environment, atom velocity and Zeeman sub-state. We present theoretical results which show that pulse shapes determined using quantum control methods can significantly improve interferometer performance by allowing broader atom distributions, larger interferometer areas and higher contrast. We have applied gradient ascent pulse engineering (GRAPE) to optimise the design of phase-modulated mirror pulses for a Mach-Zehnder light-pulse atom interferometer, with the aim of increasing fringe contrast when averaged over atoms with an experimentally relevant range of velocities, beam intensities, and Zeeman states. Pulses were found to be highly robust to variations in detuning and coupling strength, and offer a clear improvement in robustness over the best established composite pulses. The peak mirror fidelity in a cloud of ∼ 80 µK 85Rb atoms is predicted to be improved by a factor of 2 compared with standard rectangular π pulses.
Text
optimal_control_grape_saywell
- Accepted Manuscript
Text
PhysRevA.98.023625
- Version of Record
More information
Accepted/In Press date: 7 July 2018
e-pub ahead of print date: 22 August 2018
Published date: August 2018
Identifiers
Local EPrints ID: 422910
URI: http://eprints.soton.ac.uk/id/eprint/422910
ISSN: 2469-9926
PURE UUID: 3350ba85-19c6-48ed-96cb-4d7e69672dc0
Catalogue record
Date deposited: 07 Aug 2018 16:31
Last modified: 16 Mar 2024 04:11
Export record
Altmetrics
Contributors
Author:
Jack Cameron Saywell
Author:
David Goodwin
Author:
Max Carey
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
