Many-Body Schrödinger Dynamics of Bose-Einstein Condensates
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Many-Body Schrödinger Dynamics of Bose-Einstein Condensates: (Springer Theses)

Many-Body Schrödinger Dynamics of Bose-Einstein Condensates: (Springer Theses)


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At extremely low temperatures, clouds of bosonic atoms form what is known as a Bose-Einstein condensate. Recently, it has become clear that many different types of condensates  -- so called fragmented condensates -- exist. In order to tell whether fragmentation occurs or not, it is necessary to solve the full many-body Schrödinger equation, a task that remained elusive for experimentally relevant conditions for many years. In this thesis the first numerically exact solutions of the time-dependent many-body Schrödinger equation for a bosonic Josephson junction are provided and compared to the approximate Gross-Pitaevskii and Bose-Hubbard theories. It is thereby shown that the dynamics of  Bose-Einstein condensates is far more intricate than one would anticipate based on these approximations. A special conceptual innovation in this thesis are optimal lattice models. It is shown how all quantum lattice models of condensed matter physics that are based on Wannier functions, e.g. the  Bose/Fermi Hubbard model, can be optimized variationally. This leads to exciting new physics.

Table of Contents:
General Theory.- General Methods for the Quantum Dynamics of Identical Bosons.- Lattice Models for the Quantum Dynamics of Identical Bosons.- Reduced Density Matrices and Coherence of Trapped Interacting Bosons.- Exact Quantum Dynamics of a Bosonic  Josephson Junction.- Quantum Dynamics of Attractive vs. Repulsive Bosonic Josephson Junctions: Bose-Hubbard and full-Hamiltonian Results.- Optimal Time-Dependent Lattice Models for Nonequilibrium Dynamics.-Final Remarks and Outlook.-Appendices.

Review :
From the reviews: “The work under the present review is a doctoral thesis of the well-known Heidelberg University. The topic treated in the 130-page thesis is of great value with several respects. … Final remarks and outlook complete the thesis together with 6 useful appendices. In addition to extensive references at the end of the first 8 chapters there is a brief bibliography and the Scholar’s biography. Colourful figures are very interesting and informative, indeed.” (Paninjukunnath Achuthan, Zentralblatt MATH, Vol. 1233, 2012)


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Product Details
  • ISBN-13: 9783642271052
  • Publisher: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
  • Publisher Imprint: Springer-Verlag Berlin and Heidelberg GmbH & Co. K
  • Height: 235 mm
  • No of Pages: 132
  • Returnable: Y
  • Width: 155 mm
  • ISBN-10: 3642271057
  • Publisher Date: 27 Nov 2013
  • Binding: Paperback
  • Language: English
  • Returnable: Y
  • Series Title: Springer Theses


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