Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 30: Matter At Low Temperature: Quantum Liquids, Bose-Einstein Condensates, Ultra-cold Atoms, ... 1

TT 30.7: Talk

Wednesday, March 28, 2012, 16:45–17:00, H 3005

Interaction Effects in One-Dimensional Many-Body Bosonic Transport — •Arturo Argüelles, Julien Dujardin, and Peter Schlagheck — Université de Liège, Liège, Belgium

We calculate the transport properties of an ultracold gas of Bose-Einstein condensed atoms that is coupled from a magnetic trap into a one-dimensional waveguide[1,2]. A central aim of such guided atom lasers[1] is to study the role of atom-atom interaction in many-body transport processes across finite scattering regions within the waveguide resembling tunnel junctions and quantum dots. Our numerical approach to solve this many-body scattering problem is based on the Matrix Product State ansatz where we adapt absorbing boundary conditions and a external source of particles. We discuss the current, the density profiles and the transmission coefficient in the steady-state regime as functions of the interaction for varous scattering geometries.
W. Guerin et al., PRL 97, 200402 (2006).
T. Ernst et al., PRA 81, 013631 (2010).