Bosonic Monocluster Expansion |
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| Authors: | A Abdesselam J Magnen V Rivasseau |
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| Institution: | (1) Département de Mathématiques, Université Paris XIII, Paris-Nord, Villetaneuse, Avenue J.B. Clément, 93430 Villetaneuse, France, FR;(2) Centre de Physique Théorique, CNRS UMR 7644, Ecole Polytechnique, 91128 Palaiseau Cedex, France, FR |
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| Abstract: | We compute Green's functions of a Bosonic field theory with cutoffs by means of a “minimal” expansion which in a single move,
interpolating a generalized propagator, performs the usual tasks of the cluster and Mayer expansion. In this way it allows
a direct construction of the infinite volume or thermodynamic limit and it brings constructive Bosonic expansions closer to
constructive Fermionic expansions and to perturbation theory.
Received: 18 May 2000 / Accepted: 21 March 2001 |
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