128 citations · 2.3k across the 102 of their papers we have counts for
8 papers · 1 filter
Nonexponential decay of Bose-Einstein condensates: a numerical study based on the complex scaling method
Peter Schlagheck, Sandro Wimberger
We study the decay dynamics of an interacting Bose-Einstein condensate in the presence of a metastable trapping potential from which the condensate can escape via tunneling through…
Multifractal fluctuations in the survival probability of an open quantum system
Angelo Facchini, Andrea Tomadin, Sandro M. Wimberger
We predict a multifractal behaviour of transport in the deep quantum regime for the opened kicked rotor model. Our analysis focuses on intermediate and large scale correlations…
Driven Macroscopic Quantum Tunneling of Ultracold Atoms in Engineered Optical Lattices
Ramaz Khomeriki, Stefano Ruffo, Sandro Wimberger
Coherent macroscopic tunneling of a Bose-Einstein condensate between two parts of an optical lattice separated by an energy barrier is theoretically investigated. We show that by a…
Bose-Einstein condensates in accelerated double-periodic optical lattices: Coupling and Crossing of resonances
D. Witthaut, E. M. Graefe, S. Wimberger +1
We study the properties of coupled linear and nonlinear resonances. The fundamental phenomena and the level crossing scenarios are introduced for a nonlinear two-level system with…
Transient localization in the kicked Rydberg atom
E. Persson, S. Fürthauer, S. Wimberger +1
We investigate the long-time limit of quantum localization of the kicked Rydberg atom. The kicked Rydberg atom is shown to possess in addition to the quantum localization time $τ_L…
Resonance-assisted decay of nondispersive wave packets
Sandro Wimberger, Peter Schlagheck, Christopher Eltschka +1
We present a quantitative semiclassical theory for the decay of nondispersive electronic wave packets in driven, ionizing Rydberg systems. Statistically robust quantities are extra…