Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 34: Poster: Ultra-cold atoms, ions and BEC (with Q)
A 34.7: Poster
Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais
Classical scattering of charged particles confined on an inhomogeneous helix — •Alexandra Zampetaki1, Jan Stockhofe1, Sven Krönke1, and Peter Schmelcher1,2 — 1Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
We explore the effects arising due to the coupling of the centre of mass and relative motion of two charged particles confined on an inhomogeneous helix with a locally modified radius. It can be proven that a separation of the centre of mass and the relative motion is provided if and only if the confining manifold represents a homogeneous helix. In this case, bound states of repulsively Coulomb interacting particles occur.
For an inhomogeneous helix, the coupling of the centre of mass and relative motion induces an energy transfer between the collective and relative motion, leading to dissociation of initially bound states in a scattering process. Due to the time reversal symmetry, a binding of the particles out of the scattering continuum is thus equally possible. We identify the regimes of dissociation for different initial conditions and provide an analysis of the underlying phase space via Poincare surfaces of section.