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arXiv · 1208.2907

Universal four-body states in heavy-light mixtures with positive scattering length

D. Blume
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Abstract

The number of four-body states known to behave universally is small. This work adds a new class of four-body states to this relatively short list. We predict the existence of a universal four-body bound state for heavy-light mixtures consisting of three identical heavy fermions and a fourth distinguishable lighter particle with mass ratio $κ\gtrsim 9.5$ and short-range interspecies interaction characterized by a positive s-wave scattering length. The structural properties of these universal states are discussed and finite-range effects are analyzed. The bound states can be experimentally realized and probed utilizing ultracold atom mixtures.

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D. Blume. 2012-08-14. Universal four-body states in heavy-light mixtures with positive scattering length. https://doi.org/10.1103/physrevlett.109.230404

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