Generic regimes of quantum many-body dynamics of trapped bosonic systems with strong repulsive interactions

Abstract

Two generically different but universal dynamical quantum many-body behaviors are discovered by probing the stability of trapped fragmented bosonic systems with strong repulsive finite/long range inter-particle interactions. We use different time-dependent processes to destabilize the systems -- a sudden displacement of the trap is accompanied by a sudden quench of the strength of the inter-particle repulsion. A rather moderate non-violent evolution of the density in the first "topology-preserved" scenario is contrasted with a highly-non-equilibrium dynamics characterizing an explosive changes of the density profiles in the second scenario. The many-body physics behind is identified and interpreted in terms of self-induced time-dependent barriers governing the respective under- and over-a-barrier dynamical evolutions. The universality of the discovered scenarios is explicitly confirmed in 1D, 2D and 3D many-body computations in (a)symmetric traps and repulsive finite/long range inter-particle interaction potentials of different shapes. Implications are briefly discussed.