Journal
COMPTES RENDUS PHYSIQUE
Volume 12, Issue 1, Pages 59-70Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.crhy.2010.11.011
Keywords
Universality; Effective theory; External confinement
Funding
- BMBF [06BN9006]
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Few-body systems with resonant short-range interactions display universal properties that do not depend on the details of their structure or their interactions at short distances. In the three-body system, these properties include the existence of a geometric spectrum of three-body Efimov states and a discrete scaling symmetry. Similar universal properties appear in 4-body and possibly higher-body systems as well. We set up an effective theory for few-body systems in a harmonic trap and study the modification of universal physics for 3- and 4-particle systems in external confinement. In particular, we focus on systems where the Efimov effect can occur and investigate the dependence of the 4-body spectrum on the experimental tuning parameters. (C) 2010 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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