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Observation of dipole-dipole interaction in a degenerate quantum gas

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arxiv cond-mat/0508228 v2 pith:5FPXIQTL submitted 2005-08-09 cond-mat.other

Observation of dipole-dipole interaction in a degenerate quantum gas

classification cond-mat.other
keywords anisotropiccr-becdipolardipole-dipolegasesinteractionmagneticquantum
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We have investigated the expansion of a Bose-Einstein condensate (BEC) of strongly magnetic chromium atoms. The long-range and anisotropic magnetic dipole-dipole interaction leads to an anisotropic deformation of the expanding Cr-BEC which depends on the orientation of the atomic dipole moments. Our measurements are consistent with the theory of dipolar quantum gases and show that a Cr-BEC is an excellent model system to study dipolar interactions in such gases.

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