Signatures of universal four-body phenomena and their relation to the Efimov effect

By J. V. Stecher, J. D’Incao, C. Greene. 2009

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Universal few-body physics and cluster formation (2017, methodology): “A 4-body hyperspherical calculation was carried out (von Stecher et al., 2009) that was based on the use of correlated Gaussian basis functions(Suzuki and Varga, 1998) adapted to the adiabatic hyperspherical representation(Daily and Greene, 2014; Mitroy et al., 2013; Rakshit and Blume, 2012; von…”
Effective field theory description of halo nuclei (2017, unknown): “The universal behavior of Efimov tetramers was also found by calculations in shortrange potential models [286, 287, 288], and has been observed in experiments using ultracold atomic gases of (7)Li [289], (39)K [290], and (133)Cs [291].”
Feshbach resonances in ultracold gases (2008, background): “They observed a loss minimum in the same region where atom-dimer scattering shows a maximum (a ≃ 500 a0 at 30 G), which may be related to a universal connection between four- and three-body physics (Hammer and Platter, 2007; von Stecher et al., 2009).”
Observation of an Efimov spectrum in an atomic system (2009, background): “Finally, this scenario is further enriched by the presence of two universal four-body bound state”
Comparing and contrasting nuclei and cold atomic gases (2013, methodology): “Universal behavior of excited four-boson states was recently found in both variational (von Stecher et al. 2009) and zero-range models (Hammer & Platter 2007).”