Can optimised pulses improve the sensitivity of atom interferometers?
Can optimised pulses improve the sensitivity of atom interferometers?
The sensitivity of atom interferometers depends on the fidelity of the light pulses used as beamsplitters and mirrors. Atom interferometers typically employ pulses that affect €/2 and πfractional Rabi oscillations, the fidelities of which are reduced when there are variations in atomic velocity and laser intensity. We have previously demonstrated the application of optimal control theory to design pulses more robust to such errors; however, if these variations exhibit a time dependence over periods on the order of the interferometer duration then phase shifts can be introduced in the final fringe that potentially reduce the sensitivity. In this paper, we explain why care must be taken when optimising interferometer pulse sequences to ensure that phase shifts arising from inter-pulse variations are not significantly increased. We show that these phase shifts can in fact be minimised by choosing an appropriate measure of individual pulse fidelity.
atom interferometry, composite pulses, optimal control theory
Saywell, Jack
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Carey, Max
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Dedes, Nikolaos
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Kuprov, Ilya
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Freegarde, Tim
01a5f53b-d406-44fb-a166-d8da9128ea7d
6 October 2021
Saywell, Jack
bdee14ca-2df7-495b-8c38-91f539c6b7fd
Carey, Max
c2b2911d-e3a9-4537-b16e-9bbfd3b68c6c
Dedes, Nikolaos
aa6b8f4d-bd3a-4b1c-834d-14126ddba38f
Kuprov, Ilya
bb07f28a-5038-4524-8146-e3fc8344c065
Freegarde, Tim
01a5f53b-d406-44fb-a166-d8da9128ea7d
Saywell, Jack, Carey, Max, Dedes, Nikolaos, Kuprov, Ilya and Freegarde, Tim
(2021)
Can optimised pulses improve the sensitivity of atom interferometers?
Padgett, Miles J., Bongs, Kai, Fedrizzi, Alessandro and Politi, Alberto
(eds.)
In Quantum Technology: Driving Commercialisation of an Enabling Science II.
vol. 11881
(doi:10.1117/12.2598991).
Record type:
Conference or Workshop Item
(Paper)
Abstract
The sensitivity of atom interferometers depends on the fidelity of the light pulses used as beamsplitters and mirrors. Atom interferometers typically employ pulses that affect €/2 and πfractional Rabi oscillations, the fidelities of which are reduced when there are variations in atomic velocity and laser intensity. We have previously demonstrated the application of optimal control theory to design pulses more robust to such errors; however, if these variations exhibit a time dependence over periods on the order of the interferometer duration then phase shifts can be introduced in the final fringe that potentially reduce the sensitivity. In this paper, we explain why care must be taken when optimising interferometer pulse sequences to ensure that phase shifts arising from inter-pulse variations are not significantly increased. We show that these phase shifts can in fact be minimised by choosing an appropriate measure of individual pulse fidelity.
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Published date: 6 October 2021
Additional Information:
Funding Information:
The authors are grateful for funding from the UK Engineering and Physical Sciences Research Council under grant EP/T517859/1.
Publisher Copyright:
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
Keywords:
atom interferometry, composite pulses, optimal control theory
Identifiers
Local EPrints ID: 453453
URI: http://eprints.soton.ac.uk/id/eprint/453453
ISSN: 0277-786X
PURE UUID: 11d11de9-b4f0-42ae-8f4e-f804fe74994f
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Date deposited: 17 Jan 2022 17:51
Last modified: 17 Mar 2024 03:28
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Contributors
Author:
Jack Saywell
Author:
Max Carey
Editor:
Miles J. Padgett
Editor:
Kai Bongs
Editor:
Alessandro Fedrizzi
Editor:
Alberto Politi
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