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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-ph2001
Non-Gibbsianness of the invariant measures of non-reversible cellular automata with totally asymmetric noise
Roberto Fernandez, Andre Toom
We present a class of random cellular automata with multiple invariant measures which are all non-Gibbsian. The automata have configuration space {0,1}^{Z^d}, with d > 1, and they…