<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Tunneling Dynamics in Open Ultracold Bosonic Systems"^^ . "This thesis explores the quantum many-body tunneling dynamics of open ultracold bosonic systems with the recently developed multiconfigurational time-dependent Hartree for bosons (MCTDHB) method. The capabilities of MCTDHB to provide solutions to the full time-dependent many-body problem are assessed in a benchmark using the analytically solvable harmonic interaction Hamiltonian\r\nand a generalization of it with time-dependent both one- and two-body potentials. In a comparison with numerically exact MCTDHB results, it is shown that e.g. lattice methods fail qualitatively to describe the tunneling dynamics. A\r\nmodel assembling the many-body physics of the process from basic simultaneously happening single-particle processes is derived and verified with a numerically exact MCTDHB description. The generality of the model is demonstrated\r\neven for strong interactions and large particle numbers. The ejection of the bosons from the source occurs with characteristic velocities. These velocities are\r\ndefined by the chemical potentials of systems with different particle numbers which are converted to kinetic energy. The tunneling process is accompanied by fragmentation: the ejected bosons lose their coherence with the source and among each other. It is shown that the various aspects of the tunneling dynamics’ can be controlled well with the interaction and the potential threshold."^^ . "2013-06" . . . . . . . . "Axel U. J."^^ . "Lode"^^ . "Axel U. J. Lode"^^ . . . . . . "Tunneling Dynamics in Open Ultracold Bosonic Systems (PDF)"^^ . . . "dissertation_aujl.pdf"^^ . . . "Tunneling Dynamics in Open Ultracold Bosonic Systems (Compressed Archive)"^^ . . . . "e_thesis.zip"^^ . . . "Tunneling Dynamics in Open Ultracold Bosonic Systems (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Tunneling Dynamics in Open Ultracold Bosonic Systems (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Tunneling Dynamics in Open Ultracold Bosonic Systems (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Tunneling Dynamics in Open Ultracold Bosonic Systems (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Tunneling Dynamics in Open Ultracold Bosonic Systems (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #15049 \n\nTunneling Dynamics in Open Ultracold Bosonic Systems\n\n" . "text/html" . . . "500 Naturwissenschaften und Mathematik"@de . "500 Natural sciences and mathematics"@en . . . "510 Mathematik"@de . "510 Mathematics"@en . . . "530 Physik"@de . "530 Physics"@en . .