Universality and the three-body parameter of 4He trimers

Pascal Naidon, Emiko Hiyama, Masahito Ueda

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


We consider a system of three 4He atoms, which is so far the simplest realistic three-body system exhibiting the Efimov effect, in order to analyze deviations from the universal Efimov three-body spectrum. We first calculate the bound states using a realistic two-body potential, and then analyze how they can be reproduced by simple effective models beyond Efimov's universal theory. We find that the nonuniversal variations of the ground and first excited states can be well reproduced by models parametrized with only three quantities: the scattering length and effective range of the original potential, and a small three-body force. Furthermore, the three-body parameter, which fixes the origin of the infinite set of three-body levels, is found to be consistent with recent experimental observations in other atomic species.

Original languageEnglish
Article number012502
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number1
Publication statusPublished - 2012 Jul 9


Dive into the research topics of 'Universality and the three-body parameter of 4He trimers'. Together they form a unique fingerprint.

Cite this