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Alexej I. Streltsov
Researcher at Heidelberg University
Publications - 84
Citations - 3159
Alexej I. Streltsov is an academic researcher from Heidelberg University. The author has contributed to research in topics: Boson & Bose–Einstein condensate. The author has an hindex of 34, co-authored 83 publications receiving 2962 citations. Previous affiliations of Alexej I. Streltsov include University of Kassel.
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Multiconfigurational time-dependent Hartree method for bosons: Many-body dynamics of bosonic systems
TL;DR: In this paper, a multiconfigurational time-dependent Hartree (MCTDHB) model was proposed for the Bose-Einstein condensates, where the permanents (orbitals) were constructed from orthogonal one-particle functions and the expansion coefficients were determined by a standard timedependent variational principle.
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Role of excited states in the splitting of a trapped interacting Bose-Einstein condensate by a time-dependent barrier.
TL;DR: A "counterintuitive" regime is found in which the evolution of the condensate when the splitting is sufficiently slow is not to the fragmented ground state, but to a low-lying excited state which is a coherent state.
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Exact Quantum Dynamics of a Bosonic Josephson Junction
TL;DR: The quantum dynamics of a one-dimensional bosonic Josephson junction is studied by solving the time-dependent many-boson Schrödinger equation numerically exactly and exhibits rich many-body dynamics such as enhanced tunneling and a novel equilibration phenomenon of the junction depending on the interaction.
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Unified view on multiconfigurational time propagation for systems consisting of identical particles.
TL;DR: It is shown that the successful and formally exact multiconfigurational time-dependent Hartree method (MCTDH) takes on a unified and compact form when specified for systems of identical particles.
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Reduced Density Matrices and Coherence of Trapped Interacting Bosons
TL;DR: In this article, the first and second-order correlation functions of trapped interacting Bose-Einstein condensates are investigated numerically on a many-body level from first principles.