We demonstrate, both from a theoretical and an experimental point of view, the possibility of realizing a weak coupling between two Bose-Einstein condensates trapped in different Zeeman states. The weak coupling drives macroscopic quantum oscillations between the condensate populations and the observed current-phase dynamics is described by generalized Josephson equations. In order to highlight the superfluid nature of the oscillations, we investigate the response of a Rb-87 non-condensate (thermal) gas in the same conditions, showing that the thermal oscillations damp more quickly than those of the condensate.
Macroscopic oscillations between two weakly coupled Bose-Einstein condensates / Smerzi A.; Trombettoni A.; Lopez-Arias T.; Fort C.; Maddaloni P.; Minardi F.; Inguscio M.. - In: THE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS. - ISSN 1434-6028. - STAMPA. - 31:4(2003), pp. 457-461. [10.1140/epjb/e2003-00055-1]
Macroscopic oscillations between two weakly coupled Bose-Einstein condensates
Minardi F.;
2003
Abstract
We demonstrate, both from a theoretical and an experimental point of view, the possibility of realizing a weak coupling between two Bose-Einstein condensates trapped in different Zeeman states. The weak coupling drives macroscopic quantum oscillations between the condensate populations and the observed current-phase dynamics is described by generalized Josephson equations. In order to highlight the superfluid nature of the oscillations, we investigate the response of a Rb-87 non-condensate (thermal) gas in the same conditions, showing that the thermal oscillations damp more quickly than those of the condensate.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
