This paper investigates the Efimov state near its critical point using coherent few-body spectroscopy in ⁷Li atoms. Contrary to expectations, the Efimov trimer doesn't immediately dissociate at the atom-dimer threshold but survives as a metastable state within the continuum. This behavior is attributed to a repulsive interaction in the atom-dimer channel reshaping three-body interactions, particularly relevant for systems with narrow Feshbach resonances. The findings shed light on ⁷Li Efimov states and related puzzling phenomena.
Publisher
Nature Communications
Published On
Mar 08, 2024
Authors
Yaakov Yudkin, Roy Elbaz, José P. D'Incao, Paul S. Julienne, Lev Khaykovich
Tags
Efimov state
coherent few-body spectroscopy
⁷Li atoms
metastable state
atom-dimer threshold
three-body interactions
Feshbach resonances
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