Heavy-Light Few Fermion Clusters at Unitarity

Details Heavy-Light Few Fermion Clusters at Unitarity Heavy-Light Few Fermion Clusters at Unitarity

2010-06-27

arxiv.org/abs/1006.5186v1

Physics

Condensed Matter

Quantum Gases

4 pages, 2 figures

Scientific paper

We examine the physics of two, three, and four heavy fermions interacting with a single light fermion via short-range interactions. Four-particle bosonic Efimov states have proven important experimentally and also been the subject of significant theoretical effort. Similar fermionic systems are just now being investigated. We find that with some simple interactions the four- and five-particle states collapse to the interaction range at smaller mass ratios than the three-body state, and also before larger clusters can collapse. These states and their excitations can be studied in cold atom experiments, providing unique insights into the role of few-body systems in many-body physics.

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