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Velocimetry of cold atoms by matter-wave interferometry

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.
2469-9926
1-10
Carey, Max Sebastian
9d637a1b-e432-4401-968a-5e6da40435ff
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 Sebastian
9d637a1b-e432-4401-968a-5e6da40435ff
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 Sebastian, 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), 1-10. (doi:10.1103/PhysRevA.99.023631).

Record type: Article

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.

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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: https://eprints.soton.ac.uk/id/eprint/428684
ISSN: 2469-9926
PURE UUID: 34750f3b-021d-4974-9622-648567d06050
ORCID for Max Sebastian Carey: ORCID iD orcid.org/0000-0001-5283-5972
ORCID for Mohammad Belal: ORCID iD orcid.org/0000-0001-5175-3158
ORCID for Timothy Freegarde: ORCID iD orcid.org/0000-0002-0680-1330

Catalogue record

Date deposited: 06 Mar 2019 17:30
Last modified: 16 Apr 2019 00:35

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