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Cold atoms near magnetic and dielectric surfaces.

presentation
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. Richardson
We 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 Scientific

Pages

8.0

Presentation Type

  • paper

Event name

Proceedings of the 16th Conference on Laser Spectroscopy (World Scientific, Sinagpore 2004)

Event location

Palm Cove, Far North Queensland, Australia

Event type

conference

Event date

13 – 18 July 2003

ISBN

978-981-238-616-8

Department 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 Baldwin

Legacy Posted Date

2012-02-06

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