https://doi.org/10.1051/epjconf/20100302006
Functional renormalization group approach to the four-body problem
1
Physik Department, Technische Universität München,
James-Franck-Strasse, D-85748
Garching,
Germany
2
Institut für Theoretische Physik, Universität Heidelberg,
Philosophenweg 16, D-69120
Heidelberg,
Germany
a e-mail: richard.schmidt@ph.tum.de
We present a renormalization group analysis of the non-relativistic four-boson problem by means of a simple model with pointlike three- and four-body interactions. We investigate in particular the unitarity point where the scattering length is infinite and all energies are at the atom threshold. We find that the four-body problem behaves truly universally, independent of any four-body parameter confirming the findings of Platter et al. and von Stecher et al. [1–3].
© Owned by the authors, published by EDP Sciences, 2010
