Double Delta Expansions — an Open Problem

  • Miloslav Znojil
Part of the NATO ASI Series book series (NSSB, volume 361)


According to Bender et al (Phys. Rev. Lett. 58, 2615 (1987)), it is possible to treat coupling constants non-perturbatively, using an ad hoc new parameter δ. Inspiration: The formalism uses parametric differentiation of functional integrals. Question: Could the formalism of functional integrals also provide a similar recipe which would use a doublet of the expansion parameters? Hint: My preliminary, second-order study with δ replaced by (ρ, η) (Phys. Lett. A 164, 145 (1992)).

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Miloslav Znojil
    • 1
  1. 1.Ústav jaderné fyziky AV ČRŘežCzech Republic

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