2018/07/31 by Andrea Richaud, Vittorio Penna · 1 citation
Physics and Astronomy · #cond-mat.quant-gas
paper · pdf · doi:10.1088/1367-2630/aae73e
published as New Journal of Physics, 20 (10), 105008 (2018) · 21 pages, 9 figures
arxiv created 2018/09/24 · arxiv updated 2018/12/04
We investigate several dynamical regimes characterizing a bosonic binary mixture loaded in a ring trimer, with particular reference to the persistence of demixing. The degree of phase separation is evaluated by means of the "Entropy of mixing", an indicator borrowed from Statistical Thermodynamics. Three classes of demixed stationary configurations are identified and their energetic and linear stability carefully analyzed. An extended set of trajectories originating in the vicinity of fixed points are explicitly simulated and chaos is shown to arise according to three different mechanisms. In many dynamical regimes, we show that chaos is not able to disrupt the order imposed by phase separation, i.e. boson populations, despite evolving in a chaotic fashion, do not mix. This circumstance can be explained either with energetic considerations or in terms of dynamical restrictions.