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Self-induced density modulations in the free expansion of Bose-Einstein condensates by Salasnich, L.; Manini, N.; Bonelli, F.; Korbman, M.; Parola, A. is a scholarly article available to read on EtoBox.

What is Self-induced density modulations in the free expansion of Bose-Einstein condensates about?

We simulate numerically the free expansion of a repulsive Bose-Einstein condensate with an initially Gaussian density profile. We find a self-similar expansion only for weak inter-atomic repulsion. In contrast, for strong repulsion we observe the spontaneous formation of a shock wave at the surface followed by a significant depletion inside the cloud. In the expansion, contrary to the case of a classical viscous gas, the quantum fluid can generate radial rarefaction density waves with several minima and maxima. These intriguing nonlinear effects, never observed yet in free-expansion experiments with ultra-cold alkali-metal atoms, can be detected with the available setups.

Author

Salasnich, L.; Manini, N.; Bonelli, F.; Korbman, M.; Parola, A.

Published

2007

Language

EN