Frankfurt 2006 – scientific programme
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Q: Quantenoptik und Photonik
Q 33: Poster Nichtlineare Optik und Atomoptik
Q 33.3: Poster
Tuesday, March 14, 2006, 16:30–18:30, Labsaal
Enhanced Quantum Reflection of Matter-Wave Solitons — •Joachim Brand1 and Chaohong Lee1,2 — 1Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany — 2Nonlinear 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
Matter-wave bright solitons are predicted to reflect from a purely attractive potential well although they are macroscopic objects with classical particle-like properties[1]. 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.
[1] Ch. Lee and J. Brand. To be published in Europhys. Lett. cond-mat/0505697