Flow Equations and Normal Ordering

Details Flow Equations and Normal Ordering Flow Equations and Normal Ordering

2005-09-30

arxiv.org/abs/cond-mat/0509801v1

Physics

Condensed Matter

Statistical Mechanics

7 pages

Scientific paper

10.1088/0305-4470/39/6/001

In this paper we consider flow-equations where we allow a normal ordering
which is adjusted to the one-particle energy of the Hamiltonian. We show that
this flow converges nearly always to the stable phase. Starting out from the
symmetric Hamiltonian and symmetry-broken normal ordering nearly always yields
symmetry breaking below the critical temperature.

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