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Formation of dynamical Schrödinger cats in low-dimensional ultracold attractive Bose gases
Alexej I. Streltsov, Ofir E. Alon, Lorenz S. Cederbaum
Dynamical Schrödinger cats can be formed when a one-dimensional attractive Bose-gas cloud is scattered off a potential barrier. Once formed, these objects are stable in time. The p…
Reduced density matrices and coherence of trapped interacting bosons
Kaspar Sakmann, Alexej I. Streltsov, Ofir E. Alon +1
The first- and second-order correlation functions of trapped, interacting Bose-Einstein condensates are investigated numerically on a many-body level from first principles. Correla…
Build-up of coherence between initially-independent subsystems: The case of Bose-Einstein condensates
O. E. Alon, A. I. Streltsov, L. S. Cederbaum
When initially-independent subsystems are made to contact, {\it coherence} can develop due to interaction between them. We exemplify and demonstrate this paradigm through several s…
Formation and dynamics of many-boson fragmented states in attractive one-dimensional ultra-cold gases
Alexej I. Streltsov, Ofir E. Alon, Lorenz S. Cederbaum
Dynamics of attractive ultra-cold bosonic clouds in one dimension are studied by solving the many-particle time-dependent Schrödinger equation. The initially coherent wave-packet c…
On-top fragmentation stabilizes atom-rich attractive Bose-Einstein condensates
Lorenz S. Cederbaum, Alexej I. Streltsov, Ofir E. Alon
It is well known that attractive condensates do not posses a stable ground state in three dimensions. The widely used Gross-Pitaevskii theory predicts the existence of metastable s…
The multi-configurational time-dependent Hartree method for bosons: Many-body dynamics of bosonic systems
Ofir E. Alon, Alexej I. Streltsov, Lorenz S. Cederbaum
The evolution of Bose-Einstein condensates is amply described by the time-dependent Gross-Pitaevskii mean-field theory which assumes all bosons to reside in a single time-dependent…