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

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.

14 pages, 5 figs

References in corpus (3)

• Vortices in a trapped dilute Bose-Einstein condensate
• Temperature Dependence of Damping and Frequency Shifts of the Scissors Mode of a trapped Bose-Einstein Condensate
• Finite-temperature simulations of the scissors mode in Bose-Einstein condensed gases

Cited by in corpus (3)

• Two-Element Mixture of Bose and Fermi Superfluids
• Observation of a quenched moment of inertia in a rotating strongly interacting Fermi gas
• Gyroscopic motion of superfluid trapped atomic condensates