Exact decay and tunnelling dynamics of interacting few-boson systems

Axel U J Lode, Alexej I Streltsov, Ofir E Alon, Hans-Dieter Meyer, Lorenz S Cederbaum
2009 Journal of Physics B: Atomic, Molecular and Optical Physics  
The decay and tunnelling dynamics of repulsive few-boson systems through a one-dimensional potential barrier is studied from first principles. To this end, we solve the numerically exact time-dependent few-boson Schrödinger equation by utilizing the successful multiconfiguration time-dependent Hartree method. Benchmark results for a wide range of interactions are reported. Deviations from the time-dependent Gross-Pitaevskii approach are identified. Counterintuitively, the mean-field approach
more » ... n-field approach can overestimate the tunnelling times even for relatively weakly-interacting few-boson systems. Implications are discussed.
doi:10.1088/0953-4075/42/4/044018 fatcat:cujehrcqaffafgphx4avy3n7lu