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math-ph2005★ 19 cited
Mott transition in lattice boson models
Roberto Fernandez, Juerg Froehlich, Daniel Ueltschi
We use mathematically rigorous perturbation theory to study the transition between the Mott insulator and the conjectured Bose-Einstein condensate in a hard-core Bose-Hubbard model…
math-ph2004★ 1 cited
Statistical Mechanics of Thermodynamic Processes
Jürg Fröhlich, Marco Merkli, Simon Schwarz +1
In this note we describe some results concerning non-relativistic quantum systems at positive temperature and density confined to macroscopically large regions of physical space wh…
math-ph2003★ 3 cited
Cluster expansions and correlation functions
Daniel Ueltschi
A cluster expansion is proposed, that applies to both continuous and discrete systems. The assumption for its convergence involves an extension of the neat Kotecky-Preiss criterion…