Volume 73, Number 3, February 2006
|Page(s)||321 - 327|
|Published online||23 December 2005|
Enhanced quantum reflection of matter-wave solitons
Max Planck Institute for the Physics of Complex Systems Nöthnitzer Straße 38, 01187 Dresden, Germany
2 Nonlinear Physics Centre and ARC Centre of Excellence for Quantum-Atom Optics Research School of Physical Sciences and Engineering, Australian National University Canberra ACT 0200, Australia
Accepted: 5 December 2005
Matter-wave bright solitons are predicted to reflect from a purely attractive potential well although they are macroscopic objects with classical particle-like properties. The non-classical reflection occurs at small velocities and a pronounced switching to almost perfect transmission above a critical velocity is found, caused by nonlinear mean-field interactions. Full numerical results from the nonlinear Schrödinger equation are complimented by a two-mode variational calculation to explain the predicted effect, which can be used for velocity filtering of solitons. The experimental realization with laser-induced potentials or two-component Bose-Einstein condensates is suggested.
PACS: 03.75.Lm – Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices and topological excitations / 03.75.Mn – Multicomponent condensates; spinor condensates / 03.65.-w – Quantum mechanics
© EDP Sciences, 2006
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