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The European Physical Journal C

, Volume 69, Issue 1–2, pp 119–132 | Cite as

Exact flow equation for bound states

  • S. FloerchingerEmail author
Regular Article - Theoretical Physics

Abstract

We develop a formalism to describe the formation of bound states in quantum field theory using an exact renormalization group flow equation. As a concrete example we investigate a nonrelativistic field theory with instantaneous interaction where the flow equations can be solved exactly. However, the formalism is more general and can be applied to relativistic field theories, as well. We also discuss expansion schemes that can be used to find approximate solutions of the flow equations including the essential momentum dependence.

Keywords

Renormalization Group Yukawa Coupling Cutoff Function Momentum Dependence Composite Boson 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2010

Authors and Affiliations

  1. 1.Institut für Theoretische PhysikUniversität HeidelbergHeidelbergGermany

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