Bose gas beyond mean field
نویسندگان
چکیده
منابع مشابه
The Bose gas beyond mean field
We study a homogeneous Bose gas with purely repulsive forces. Using the Kac scaling of the binary potential we derive analytically the form of the thermodynamic functions of the gas for small but finite values of the scaling parameter in the low density regime. In this way we determine dominant corrections to the mean-field theory. It turns out that repulsive forces increase the pressure at fix...
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D. Witthaut,1,* F. Trimborn,2 H. Hennig,1 G. Kordas,3 T. Geisel,1 and S. Wimberger3 1Max Planck Institute for Dynamics and Self-Organization, D-37073 Göttingen, Germany 2Institut für Theoretische Physik, Leibniz Universität Hannover, D-30167 Hannover, Germany 3Institut für Theoretische Physik and Center for Quantum Dynamics, Universität Heidelberg, D-69120 Heidelberg, Germany (Received 23 June ...
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C. Bodet,1,3 J. Estève,2 M. K. Oberthaler,2,3 and T. Gasenzer1,3 1Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, D-69120 Heidelberg, Germany 2Kirchhoff Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, D-69120 Heidelberg, Germany 3ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Pla...
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We consider the ground state of a trapped Bose-Einstein condensate in two dimensions. In the mean-field approximation, the ground state density profile satisfies the Gross-Pitaevskii equation. We compute the leading quantum corrections to the density profile to second order in an expansion around the Thomas-Fermi limit. By summing the ladder diagrams,we are generalizing Schick’s result for the ...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2005
ISSN: 1539-3755,1550-2376
DOI: 10.1103/physreve.71.016109