The Moment of Inertia and the Scissors Mode of a Bose-condensed Gas

C.J. Foot; E. Hodby; G. Hechenblaikner; O.M. Marago'; S.A. Hopkins

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The Moment of Inertia and the Scissors Mode of a Bose-condensed Gas

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arxiv cond-mat/0109193 v1 pith:GOUZGGHP submitted 2001-09-11 cond-mat.stat-mech

O.M. Marago' , G. Hechenblaikner , E. Hodby , S.A. Hopkins , C.J. Foot This is my paper

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keywords inertiamomentmodescissorstemperaturebosefrequencytrapped

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abstract

We relate the frequency of the scissors mode to the moment of inertia of a trapped Bose gas at finite temperature in a semi-classical approximation. We apply these theoretical results to the data obtained in our previous study of the properties of the scissors mode of a trapped Bose-Einstein condensate of $^{87}$Rb atoms as a function of the temperature. The frequency shifts that we measured show quenching of the moment of inertia of the Bose gas at temperatures below the transition temperature - the system has a lower moment of inertia that of a rigid body with the same mass distribution, because of superfluidity.

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