Phys. Rev. E 60, 324–334 (1999)Dynamical ansatz for path integrals and nonperturbative trace formulasReceived 17 December 1998; published in the issue dated July 1999 It is shown that a recently discovered representation of the Green’s function is equivalent to a certain “dynamical ansatz” for the corresponding path integral, which brings about a convenient method of nonperturbative approximations. Based on this observation, a set of nonperturbative approximations to the trace of the Green’s function is established. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.60.324
DOI:
10.1103/PhysRevE.60.324
PACS:
05.45.Mt, 11.15.Tk, 03.65.Db
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