J. Phys. II France
Volume 4, Numéro 11, November 1994
Page(s) 2029 - 2042
DOI: 10.1051/jp2:1994245
J. Phys. II France 4 (1994) 2029-2042

Magnetic coherences in atom interferometry

Jörg Schmiedmayer1, 2, Christopher R. Ekstrom1, Michael S. Chapman1, Troy D. Hammond1 and David E. Pritchard1

1  Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusets 02139, U.S.A.
2  Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck Austria

(Received 2 May 1994, accepted in final form 22 July 1994)

We have used a separated beam atom interferometer to investigate magnetically-induced phase shifts of the different magnetic substates of the sodium ground state. We have observed periodic rephasing of the 8 independent magnetic substates present in an unpolarized sodium beam as the differential magnetic field is increased on opposite sides of the interferometer. We have also demonstrated that two phase shifts with similar velocity dependences can be used to cancel each other, creating an interference pattern from one magnetic substate although an unpolarized beam is sent into the interferometer. Finally we discuss some applications of these techniques.

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