Consequence of superfluidity on the expansion of a rotating Bose-Einstein condensate

Abstract

We study the time evolution of a rotating condensate, that expands after being suddenly released from the confining trap, by solving the hydrodynamic equations of irrotational superfluids. For slow initial rotation speeds, ${\Omega }_0$, we find that the condensate's angular velocity increases rapidly to a maximum value and this is accompanied by a minimum in the deformation of the condensate in the rotating plane. During the expansion the sample makes a global rotation of approximately $\pi /2$, where the exact value depends on ${\Omega }_0$. This minimum deformation can serve as an easily detectable signature of superfluidity in a Bose--Einstein condensate.

4 pages, 3 figures, submitted to PRL

Cited by in corpus (17)

• Theory of ultracold Fermi gases
• Nearly Perfect Fluidity: From Cold Atomic Gases to Hot Quark Gluon Plasmas
• A two atomic species superfluid
• Emergence of turbulence in an oscillating Bose-Einstein condensate
• Shortcut to adiabaticity for an interacting Bose-Einstein condensate
• Two-Element Mixture of Bose and Fermi Superfluids
• Evidence of superfluidity in a dipolar supersolid from non-classical rotational inertia
• Shortcuts to adiabaticity for trapped ultracold gases
• Direct observation of irrotational flow and evidence of superfluidity in a rotating Bose-Einstein condensate
• Observation of a quenched moment of inertia in a rotating strongly interacting Fermi gas
• Dissipative fluid dynamics for the dilute Fermi gas at unitarity: Free expansion and rotation
• Scaling Flows and Dissipation in the Dilute Fermi Gas at Unitarity
• Enhancement of the scissors mode of an expanding Bose-Einstein condensate
• Self-similar expansion of the density profile in a turbulent Bose-Einstein condensate
• Efficient description of Bose-Einstein condensates in time-dependent rotating traps
• Efficient numerical description of the dynamics of interacting multispecies quantum gases
• Semi-classical analysis with new Galilean transformations for a Gross--Pitaevskii system with non-zero conditions at infinity