Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 48: Quantum Gases: Effects of Interactions

Q 48.8: Talk

Thursday, March 17, 2011, 12:15–12:30, SCH 251

Multi-shooting algorithm for the calculation of the bounce trajectory in Bose-Einstein condensates with attractive 1/r- interaction — •Kai Marquardt, Jörg Main, and Günter Wunner — 1. Institut für Theoretische Physik, Universität Stuttgart

Bose-Einstein condensates of cold dilute atomic gases with attractive 1/r-interaction are well described by the Gross-Pitaevskii equation (GP). We solve the GP by a time-dependent variational principle using an ansatz of superimposed Gaussians. The condensates can decay from the metastable ground state into a collapsing state due to macroscopic quantum tunneling. To determine the tunneling rates we calculate the bounce trajectory in imaginary time by a multi-shooting algorithm.