Scaling properties of universal tetramers

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2011-09-23

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Hadizadeh, M. R. [UNESP]
Yamashita, M. T. [UNESP]
Tomio, Lauro [UNESP]
Delfino, A.
Frederico, T.

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We evidence the existence of a universal correlation between the binding energies of successive four-boson bound states (tetramers), for large two-body scattering lengths (a), related to an additional scale not constrained by three-body Efimov physics. Relevant to ultracold atom experiments, the atom-trimer relaxation peaks for |a|→∞ when the ratio between the tetramer and trimer energies is 4.6 and a new tetramer is formed. The new scale is also revealed for a<0 by the prediction of a correlation between the positions of two successive peaks in the four-atom recombination process. © 2011 American Physical Society.

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Physical Review Letters, v. 107, n. 13, 2011.