Velocimetry of cold atoms by matter-wave interferometry
Velocimetry of cold atoms by matter-wave interferometry
We present an elegant application of matterwave interferometry to the velocimetry of cold atoms whereby, in analogy to Fourier transform spectroscopy, the 1-D velocity distribution is manifest in the frequency domain of the interferometer output. By using stimulated Raman transitions between hyperfine ground states to perform a three-pulse interferometer sequence, we have measured the velocity distributions of clouds of freely-expanding $^{85}$Rb atoms with temperatures of 34 $\mu$K and 18 $\mu$K. Quadrature measurement of the interferometer output as a function of the temporal asymmetry yields velocity distributions with excellent fidelity. Our technique, which is particularly suited to ultracold samples, compares favourably with conventional Doppler and time-of-flight techniques, and reveals artefacts in standard Raman Doppler methods. The technique is related to, and provides a conceptual foundation of, interferometric matterwave accelerometry, gravimetry and rotation sensing.
1-10
Carey, Max
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Saywell, Jack Cameron
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Elcock, David Emanuel
03ce0d6c-6a49-4a4d-8caf-71b32b254ac4
Belal, Mohammad
33550de9-0df1-4c90-bae6-3eb65c62778a
Freegarde, Timothy
01a5f53b-d406-44fb-a166-d8da9128ea7d
28 February 2019
Carey, Max
c2b2911d-e3a9-4537-b16e-9bbfd3b68c6c
Saywell, Jack Cameron
da7a642a-ed67-4bd0-8959-e4c2874a8e67
Elcock, David Emanuel
03ce0d6c-6a49-4a4d-8caf-71b32b254ac4
Belal, Mohammad
33550de9-0df1-4c90-bae6-3eb65c62778a
Freegarde, Timothy
01a5f53b-d406-44fb-a166-d8da9128ea7d
Carey, Max, Saywell, Jack Cameron, Elcock, David Emanuel, Belal, Mohammad and Freegarde, Timothy
(2019)
Velocimetry of cold atoms by matter-wave interferometry.
Physical Review A, 99 (2), , [023631].
(doi:10.1103/PhysRevA.99.023631).
Abstract
We present an elegant application of matterwave interferometry to the velocimetry of cold atoms whereby, in analogy to Fourier transform spectroscopy, the 1-D velocity distribution is manifest in the frequency domain of the interferometer output. By using stimulated Raman transitions between hyperfine ground states to perform a three-pulse interferometer sequence, we have measured the velocity distributions of clouds of freely-expanding $^{85}$Rb atoms with temperatures of 34 $\mu$K and 18 $\mu$K. Quadrature measurement of the interferometer output as a function of the temporal asymmetry yields velocity distributions with excellent fidelity. Our technique, which is particularly suited to ultracold samples, compares favourably with conventional Doppler and time-of-flight techniques, and reveals artefacts in standard Raman Doppler methods. The technique is related to, and provides a conceptual foundation of, interferometric matterwave accelerometry, gravimetry and rotation sensing.
Text
velocimetry-final
- Accepted Manuscript
More information
Accepted/In Press date: 1 February 2019
Published date: 28 February 2019
Additional Information:
Version of record copyright © 2019 American Physical Society
Physical Review A 99, 023631 (2019)
Identifiers
Local EPrints ID: 428684
URI: http://eprints.soton.ac.uk/id/eprint/428684
ISSN: 2469-9926
PURE UUID: 34750f3b-021d-4974-9622-648567d06050
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Date deposited: 06 Mar 2019 17:30
Last modified: 16 Mar 2024 03:58
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Author:
Max Carey
Author:
Jack Cameron Saywell
Author:
David Emanuel Elcock
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