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Harmonically trapped four-boson system
2018
Physical Review A
Four identical spinless bosons with purely attractive two-body short-range interactions and repulsive three-body interactions under external spherically symmetric harmonic confinement are considered. The repulsive three-body potential prevents the formation of deeply-bound states with molecular character. The low-energy spectrum with vanishing orbital angular momentum and positive parity for infinitely large two-body s-wave scattering length is analyzed in detail. Using the three-body contact,
doi:10.1103/physreva.97.033621
fatcat:7zi5kvqcc5eejdchhirlstw6ue