Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 24: Ultra-cold atoms, ions and BEC IV (with Q)

A 24.4: Vortrag

Mittwoch, 20. März 2013, 11:45–12:00, F 428

Dynamics of Bose-Einstein condensates in PT-symmetric double-well potentials — •Daniel Haag, Dennis Dast, Holger Cartarius, and Günter Wunner — 1. Institut für Theoretische Physik, Universität Stuttgart

The study of non-Hermitian Hamiltonians has attracted large attention in recent years. A special class of such systems are described by non-Hermitian but PT-symmetric Hamiltonians that can have entirely real spectra. In general, non-Hermitian systems do not conserve the norm of a wave packet, which has a severe effect on the dynamics of nonlinear systems such as Bose-Einstein condensates described by the Gross-Pitaevskii equation. We investigate the stability of the eigenstates and solve the time-dependent GPE for a PT-symmetric double well, where in one well particles are removed while particles are coherently injected into the other.