Abstract
Using the mean-field GP equation, we study the dynamics of superfluid dilute Bose-Einstein condensates (BECs) in the regime where the flow velocity reaches a critical value above which stationary currents are impossible. We present results for two- and three-dimensional BECs in two different geometries: a toroidal and a waveguide configuration, and also discuss the behavior of the critical current, or critical velocity, establishing a general criterion for the breakdown of stationary superfluid flows.
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Piazza, F., Collins, L.A., Smerzi, A. (2013). Superfluid Instability and Critical Velocity in Two and Three Dimensions. In: Bramati, A., Modugno, M. (eds) Physics of Quantum Fluids. Springer Series in Solid-State Sciences, vol 177. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37569-9_12
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DOI: https://doi.org/10.1007/978-3-642-37569-9_12
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