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 Rb-87 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 than that of a rigid body with the same mass distribution, because of superfluidity.
The moment of inertia and the scissors mode of a Bose-condensed gas
2002
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 Rb-87 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 than that of a rigid body with the same mass distribution, because of superfluidity.File in questo prodotto:
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