68 citations · 219 across the 7 of their papers we have counts for
7 papers
The two-body random spin ensemble and a new type of quantum phase transition
Iztok Pizorn, Tomaz Prosen, Stefan Mossmann +1
We study the properties of a two-body random matrix ensemble for distinguishable spins. We require the ensemble to be invariant under the group of local transformations and analyze…
Oscillation dynamics of multi-well condensates
S. Mossmann, C. Jung
We propose a new approach to the macroscopic dynamics of three-well Bose-Einstein condensates, giving particular emphasis to self-trapping and Josephson oscillations. Although thes…
Semiclassical approach to Bose-Einstein condensates in a triple well potential
S. Mossmann, C. Jung
We present a new approach for the analysis of Bose-Einstein condensates in a few mode approximation. This method has already been used to successfully analyze the vibrational modes…
Chaotic Quantum Decay in Driven Biased Optical Lattices
S. Mossmann, C. Schumann, H. J. Korsch
Quantum decay in an ac driven biased periodic potential modeling cold atoms in optical lattices is studied for a symmetry broken driving. For the case of fully chaotic classical dy…
Bloch oscillations of Bose-Einstein condensates: Breakdown and revival
D. Witthaut, M. Werder, S. Mossmann +1
We investigate the dynamics of Bose-Einstein condensates (BEC) in a tilted one-dimensional periodic lattice within the mean-field (Gross-Pitaevskii) description. Unlike in the line…
Bound and resonance states of the nonlinear Schroedinger equation in simple model systems
D. Witthaut, S. Mossmann, H. J. Korsch
The stationary nonlinear Schroedinger equation, or Gross-Pitaevskii equation, is studied for the cases of a single delta potential and a delta-shell potential. These model systems…