Regensburg 2010 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 15: MLT: Quantum Liquids, Bose-Einstein Condensates, Ultra-cold Atoms, ... 1

TT 15.7: Vortrag

Dienstag, 23. März 2010, 15:45–16:00, H18

Numerical analysis of dissipation-induced correlations in 1D bosonic systems — •Martin Kiffner and Michael Hartmann — Technische Universität München, Physik-Department I, James-Franck-Straße, 85748 Garching, Germany

In one-dimensional systems, bosons can behave with respect to many observables as if they were fermions. This strongly correlated regime of a Tonks-Girardeau (TG) gas regime can be reached for strong repulsive interactions between the particles. Recently, an experiment [1] with cold molecules showed that not only elastic interactions, but even two-particle losses alone are able to create a TG gas. Theoretical work [2] suggests that a dissipation induced TG gas could also be realized with polaritons. The molecular and the polariton system are both described by a master equation for bosons in a one-dimensional setting that experience inelastic two-particle interactions.

Here we present a numerical analysis of this master equation via a time-evolving block-decimation (TEBD) algorithm. In particular, we address the preparation of the strongly correlated regime starting from an uncorrelated state and discuss the time evolution of local as well as non-local observables.

[1] N. Syassen, D. M. Bauer, M. Lettner, T. Volz, D. Dietze, J. J. Garcia-Ripoll, J. I. Cirac, G. Rempe, S. Dürr, Science 320, 1329 (2009).

[2] M. Kiffner and M. J. Hartmann, arXiv:0908.2055.