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Cold atoms near magnetic and dielectric surfaces.
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posted on 2023-06-08, 09:00 authored by M.P.A. Jones, C.J. Vale, D Sahagun, B. V. Hall, B.E. Sauer, E.A. Hinds, Claudia Eberlein, K . Furusawa, D. RichardsonWe describe experiments in which ultracold rubidium atoms held by a microscopic magnetic trap near a room temperature metal wire are used to study the magnetic fields above the wire. By studying the density distribution of the atoms we detect a weak static magnetic field component ?Bz parallel to the wire. This field is proportional to the current in the wire and is approximately periodic along the wire with period ? = 230 µm. We find that the decrease of this field with distance from the centre of the wire is well described by the Bessel function K1(2py/?), as one would expect for the far field of a transversely oscillating current within the wire. We have also studied the lifetime for the atoms to remain in the microtrap over distances down to 27 µm from the surface of the metal. We observe the loss of atoms from the microtrap due to spin flips. These are induced by radio-frequency thermal fluctuations of the magnetic field near the surface, as predicted but not previously observed.
History
Publication status
- Published
Publisher
World ScientificExternal DOI
Pages
8.0Presentation Type
- paper
Event name
Proceedings of the 16th Conference on Laser Spectroscopy (World Scientific, Sinagpore 2004)Event location
Palm Cove, Far North Queensland, AustraliaEvent type
conferenceEvent date
13 – 18 July 2003ISBN
978-981-238-616-8Department affiliated with
- Physics and Astronomy Publications
Notes
Published in: LASER SPECTROSCOPY: Proceedings of the XVI International Conference. pp.223-230.Full text available
- No
Peer reviewed?
- Yes
Editors
H Bachor, A Sidorov, P Hannaford, K BaldwinLegacy Posted Date
2012-02-06Usage metrics
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