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Cold atoms probe the magnetic field near a wire

Cold atoms probe the magnetic field near a wire
Cold atoms probe the magnetic field near a wire
A microscopic Ioffe-Pritchard trap is formed using a straight, current-carrying wire, together with suitable auxiliary magnetic fields. By measuring the distribution of cold rubidium atoms held in this trap, we detect a weak magnetic field component Delta.B(z) parallel to the wire. This is produced by the current in the wire and is approximately periodic along the wire with period lambda = 230 µm. We have measured this field at distances in the range y = 250-350 µm from the centre of the wire. Over this range we find that the decrease of the field is well described by the Bessel function K1(2.pi.y/lambda), as one would expect for the far field of a transversely oscillating current within the wire.
0953-4075
L15-L20
Jones, M.P.A.
93d1e1fc-1ed6-4b03-9ae7-78d0dece3777
Vale, C.J.
bef4b3ee-7ea4-40cd-954a-490724e5619a
Sahagun, D.
e43cc066-1a8b-4c90-9ece-685454db7a52
Hall, B.V.
2a12192a-9250-4fc3-afac-7dc2e4a61d3c
Eberlein, C.C.
e597654a-8a44-4e44-ac9b-1bc791f49d02
Sauer, B.E.
f2de29cb-9025-43ac-8ed2-80e0e4dbcac8
Furusawa, K.
f84c2a9c-89d8-41a1-9d7a-b196fc4ed60c
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Hinds, E.A.
a3f6858d-f3fc-460f-84d1-193257a88aac
Jones, M.P.A.
93d1e1fc-1ed6-4b03-9ae7-78d0dece3777
Vale, C.J.
bef4b3ee-7ea4-40cd-954a-490724e5619a
Sahagun, D.
e43cc066-1a8b-4c90-9ece-685454db7a52
Hall, B.V.
2a12192a-9250-4fc3-afac-7dc2e4a61d3c
Eberlein, C.C.
e597654a-8a44-4e44-ac9b-1bc791f49d02
Sauer, B.E.
f2de29cb-9025-43ac-8ed2-80e0e4dbcac8
Furusawa, K.
f84c2a9c-89d8-41a1-9d7a-b196fc4ed60c
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Hinds, E.A.
a3f6858d-f3fc-460f-84d1-193257a88aac

Jones, M.P.A., Vale, C.J., Sahagun, D., Hall, B.V., Eberlein, C.C., Sauer, B.E., Furusawa, K., Richardson, D.J. and Hinds, E.A. (2004) Cold atoms probe the magnetic field near a wire. Journal of Physics B: Atomic and Molecular Physics, 37 (2), L15-L20. (doi:10.1088/0953-4075/37/2/L01).

Record type: Article

Abstract

A microscopic Ioffe-Pritchard trap is formed using a straight, current-carrying wire, together with suitable auxiliary magnetic fields. By measuring the distribution of cold rubidium atoms held in this trap, we detect a weak magnetic field component Delta.B(z) parallel to the wire. This is produced by the current in the wire and is approximately periodic along the wire with period lambda = 230 µm. We have measured this field at distances in the range y = 250-350 µm from the centre of the wire. Over this range we find that the decrease of the field is well described by the Bessel function K1(2.pi.y/lambda), as one would expect for the far field of a transversely oscillating current within the wire.

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More information

Published date: January 2004

Identifiers

Local EPrints ID: 46956
URI: https://eprints.soton.ac.uk/id/eprint/46956
ISSN: 0953-4075
PURE UUID: 548fa904-7c0c-48ec-84c3-810e0c4ce167
ORCID for D.J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058

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Date deposited: 25 Jul 2007
Last modified: 10 Dec 2019 01:57

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