Related Experiment Video
Updated: Aug 5, 2026

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Manifestation of superfluidity in an evolving Bose-Einstein condensed gas
1RRC Kurchatov Institute, Kurchatov Square 1, 123182 Moscow, Russia.
Abstract:
We study the generation of excitations due to an "impurity" (static perturbation) placed into an oscillating Bose-Einstein 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.
Related Concept Videos
Molecular Comparison of Gases, Liquids, and Solids
Phase Transitions: Vaporization and Condensation
Entropy
Kinetic Theory of an Ideal Gas
The number of molecules in one mole is called Avogadro's number...
Distribution of Molecular Speeds
Maxwell-Boltzmann Distribution: Problem Solving
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by

