Bosonic Monocluster Expansion

Details Bosonic Monocluster Expansion Bosonic Monocluster Expansion

2000-02-28

arxiv.org/abs/math-ph/0002053v1

Commun.Math.Phys. 229 (2002) 183-207

Physics

Mathematical Physics

30 pages, 1 figure

Scientific paper

10.1007/s002200200654

We compute connected 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.

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