A path-integral analysis of interacting Bose gases and loop gases

Friday, 31 January, 2020

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We review some recent results on interacting Bose gases in thermal equilibrium. In particular, we study the convergence of the grand-canonical equilibrium states of such gases to their mean-field limits, which are given by the Gibbs measures of classical field theories with quartic Hartree-type self-interaction, and to the Gibbs states of classical gases of point particles. We discuss various open problems and conjectures concerning, e.g., Bose-Einstein condensation, polymers and \vert \boldsymbol{\phi} \vert^{4}-theory.


Jürg Fröhlich
Antti Knowles
Benjamin Schlein
Vedran Sohinger