Mainz 2017 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 14: Quantum Gases: Bosons II
Q 14.4: Talk
Monday, March 6, 2017, 17:45–18:00, P 204
Many-particle quantum dynamics after an interaction quench for ground state quantum bright solitons — •Christoph Weiss1 and Lincoln Carr2 — 1Joint Quantum Centre (JQC) Durham-Newcastle, Department of Physics, Durham University, United Kingdom — 2Colorado School of Mines, Golden, USA
We investigate attractively interacting bosons in a (quasi-)one-dimensional waveguide initially prepared in the ground state of an additional harmonic potential, a quantum bright soliton. An interaction quench that increases the interaction by a factor of four combined with switching off the potential leads to a higher-order soliton for which the mean-field description via the Gross-Pitaevskii equation predicts oscillations of the variance of the single particle density. By combining numerical investigations using TEBD with analytical Lieb-Liniger results, we show that the soliton breaks apart. This behaviour is visible when measuring the relative distance between particles.