Optimal control of Raman pulse sequences for atom interferometry
Optimal control of Raman pulse sequences for atom interferometry
We present the theoretical design and experimental implementation of mirror and beamsplitter pulses that improve the fidelity of atom interferometry and increase its tolerance of systematic inhomogeneities. These pulses are designed using the GRAPE optimal control algorithm and demonstrated experimentally with a cold thermal sample of 85Rb atoms. We first show a stimulated Raman inversion pulse design that achieves a ground hyperfine state transfer efficiency of 99.8(3)%, compared with a conventional π pulse efficiency of 75(3)%. This inversion pulse is robust to variations in laser intensity and detuning, maintaining a transfer efficiency of 90% at detunings for which the π pulse fidelity is below 20%, and is thus suitable for large momentum transfer interferometers using thermal atoms or operating in non-ideal environments. We then extend our optimization to all components of a Mach-Zehnder atom interferometer sequence and show that with a highly inhomogeneous atomic sample the fringe visibility is increased threefold over that using conventional π and π/2 pulses.
1-10
Saywell, Jack Cameron
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Carey, Max
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Belal, Mohammad
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Kuprov, Ilya
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Freegarde, Tim
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23 March 2020
Saywell, Jack Cameron
da7a642a-ed67-4bd0-8959-e4c2874a8e67
Carey, Max
c2b2911d-e3a9-4537-b16e-9bbfd3b68c6c
Belal, Mohammad
33550de9-0df1-4c90-bae6-3eb65c62778a
Kuprov, Ilya
bb07f28a-5038-4524-8146-e3fc8344c065
Freegarde, Tim
01a5f53b-d406-44fb-a166-d8da9128ea7d
Saywell, Jack Cameron, Carey, Max, Belal, Mohammad, Kuprov, Ilya and Freegarde, Tim
(2020)
Optimal control of Raman pulse sequences for atom interferometry.
Journal of Physics B, 53 (8), , [085006].
(doi:10.1088/1361-6455/ab6df6).
Abstract
We present the theoretical design and experimental implementation of mirror and beamsplitter pulses that improve the fidelity of atom interferometry and increase its tolerance of systematic inhomogeneities. These pulses are designed using the GRAPE optimal control algorithm and demonstrated experimentally with a cold thermal sample of 85Rb atoms. We first show a stimulated Raman inversion pulse design that achieves a ground hyperfine state transfer efficiency of 99.8(3)%, compared with a conventional π pulse efficiency of 75(3)%. This inversion pulse is robust to variations in laser intensity and detuning, maintaining a transfer efficiency of 90% at detunings for which the π pulse fidelity is below 20%, and is thus suitable for large momentum transfer interferometers using thermal atoms or operating in non-ideal environments. We then extend our optimization to all components of a Mach-Zehnder atom interferometer sequence and show that with a highly inhomogeneous atomic sample the fringe visibility is increased threefold over that using conventional π and π/2 pulses.
Text
Saywell et al 2020 J. Phys. B At. Mol. Opt. Phys.
- Accepted Manuscript
Text
Saywell 202 J. Phys. B At. Mol. Opt. Phys. 53 085006
- Version of Record
More information
Accepted/In Press date: 21 January 2020
e-pub ahead of print date: 21 January 2020
Published date: 23 March 2020
Identifiers
Local EPrints ID: 437766
URI: http://eprints.soton.ac.uk/id/eprint/437766
ISSN: 0022-3700
PURE UUID: 40afe1a7-9c93-4e4c-ad5a-8aaa9567f2c3
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Date deposited: 14 Feb 2020 17:33
Last modified: 17 Mar 2024 03:28
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Author:
Jack Cameron Saywell
Author:
Max Carey
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