Heidelberg 2015 – scientific programme

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A: Fachverband Atomphysik

A 15: Ultra-cold atoms, ions and BEC II (with Q)

A 15.7: Talk

Tuesday, March 24, 2015, 16:00–16:15, C/HSW

Controlling a PT-symmetric double well by an additional well — •Daniel Haag, Dennis Dast, Holger Cartarius, and Günter Wunner — 1. Institut für Theoretische Physik, Universität Stuttgart

Non-Hermitian Hamiltonians provide an efficient way to describe in- and outcoupling of atoms in Bose-Einstein condensates. Of special interest are PT-symmetric Hamiltonians which often provide PT-symmetric eigenstates with real eigenvalues. These states are truly stationary even though the particles are removed and injected at different locations. We implement such a Hamiltonian for a three-mode system, where one additional well is coupled to a PT-symmetric double well. The influences of the third well on the well known behaviour of the two-well system is studied.