Stuttgart 2012 – wissenschaftliches Programm
Q 22.7: Vortrag
Dienstag, 13. März 2012, 12:15–12:30, V7.03
Macroscopic quantum tunnelling and bounce solutions of Bose-Einstein condensates with dipolar interactions — •Torsten Schwidder, Jörg Main, and Günter Wunner — 1. Institut für Theoretische Physik, Universität Stuttgart
Macroscopic quantum tunnelling is discussed for Bose-Einstein condensates with dipolar interaction. The decay of a metastable ground state into a collapsing wave function is investigated in a time-dependent variational approach to the nonlinear Gross-Pitaevskii equation. The bounce trajectory is computed in imaginary time using a multi-shooting algorithm, and tunnelling rates are calculated. The fluctuation prefactor is accessible using the monodromy matrix, and the relation to the Gelfand-Yaglom differential equation is shown.