A Lippmann-Schwinger based scheme with Hermite recursion efficiently computes converged spectra for three/four 1D bosons and three 1D fermions with zero-range interactions, validated by Bose-Fermi mapping and free-space binding energies.
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Efficient determination of eigenenergies and eigenstates of $N$ ($N=3$--$4$) identical 1D bosons and fermions under external harmonic confinement
A Lippmann-Schwinger based scheme with Hermite recursion efficiently computes converged spectra for three/four 1D bosons and three 1D fermions with zero-range interactions, validated by Bose-Fermi mapping and free-space binding energies.