Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster: Quantum Optics and Photonics I

Q 15.1: Poster

Montag, 23. März 2015, 17:00–19:00, C/Foyer

From short-time diffusive to long-time ballistic dynamics: the unusual center-of-mass motion of quantum bright solitons — •Christoph Weiss¹, Simon Gardiner¹, and Heinz-Peter Breuer² — ¹Joint Quantum Centre (JQC) Durham–Newcastle, Department of Physics, Durham University, Durham DH1 3LE, United Kingdom — ²Physikalisches Institut, Universität Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany

Brownian motion is ballistic on short time scales and diffusive on long time scales. Our theoretical investigations indicate that one can observe the exact opposite — initially diffusive motion that becomes ballistic on longer time scales — in an ultracold atom system with a size comparable to macromolecules. This system is a quantum matter-wave bright soliton subject to decoherence via three-particle losses for which we investigate the center-of-mass motion. Our simulations show that such unusual center-of-mass dynamics should be observable on experimentally accessible time scales.