Manifestation of superfluidity in an evolving Bose-condensed gas
arXiv:cond-mat/0008207 · doi:10.1103/PhysRevLett.85.3075
Abstract
We study the generation of excitations due to an ''impurity''(static perturbation) placed into an oscillating Bose-condensed gas in the time-dependent trapping field. It is shown that there are two regions for the position of the local perturbation. In the first region the condensate flows around the ''impurity'' without generation of excitations demonstrating superfluid properties. In the second region the creation of excitations occurs, at least within a limited time interval, revealing destruction of superfluidity. The phenomenon can be studied by measuring the damping of condensate oscillations at different positions of the ''impurity''.
References in corpus (3)
Cited by in corpus (5)
- Superfluid and Dissipative Dynamics of a Bose-Einstein Condensate in a Periodic Optical Potential
- Motion of a heavy impurity through a Bose-Einstein condensate
- Exact solutions and excitations for the Davey-Stewartson equations with nonlinear and gain terms
- Motion of an Impurity in a Bose-Einstein Condensate with Weyl Spin-Orbit Coupling: Non-collinear Drag Force and Anisotropic Critical Velocity
- Superfluidity and collective oscillations of trapped Bose-Einstein condensates in a periodical potential