Plot of effective potential (in cm−1) as a function of hyper-radius, r, at dimer scattering length for N = 6, 5, 4, and 3 atoms. Blue line corresponds to ground state energy.
Plot of effective potential, ω0(r), as a function of hyper-radius, r, at the dimer scattering length for indicated cluster sizes.
Plot of the difference in two consecutive cluster energies, ΔE = E (N+1) − E (N), as a function of cluster size N.
Plot of the average size of cluster, R av , as a function of cluster size N for Rb and He clusters.
Plot of ground state energy of Rb cluster with several indicated C 6 parameters.
Plot of normalised pair correlation function P(r ij ) against pair separation r ij for indicated cluster sizes (N).
Plot of effective potential ω0(r) (in cm−1) as functions of hyper-radius r (in Bohr) for clusters containing N = 3, 10, 20, and 40 Rb atoms with a sc = 10, 100, and 2000 Bohr.
Energies (in cm−1) of ground state (E 0) and first excited state (E 1) of Rb cluster as functions of cluster size N for the chosen scattering lengths, as indicated in the figure.
Plus sign shows the energy ratio, R 1 = as a function of energy ratio, R 2 = . Solid line is our two parameter fit. Details are in the text.
Plus sign shows the energy ratio, R 1 = , as a function of energy ratio, R 2 = , for (a) N = 4, (b) N = 5, (c) N = 6, (d) N = 7, (e) N = 8, (f) N = 9. Solid line is our two parameter fit. Details are in the text.
Loss rate due to three-body collisions, (a) as a function of cluster size for dimer scattering length; (b) as a function of scattering length for two fixed sizes of cluster as indicated in the figure.
Position (r m ) and value (ω0m ) of the minimum of lowest eigenpotential ω0(r) for different Rb N clusters. Length and energy are in units of Bohr and cm−1, respectively.
Comparison of ground state energetics for Rb N (N = 3 to 40) cluster and for He N (N = 3 to 9) cluster. E 0 is the ground state energy, is the ground state energy per particle, and ⟨V⟩ is the expectation value of the interaction energy. All energies are in cm−1.
Comparison of first few excited state energies of He and Rb clusters. E 1 , E 2 , E 3 are the energies of first, second, and third excited states, respectively. The energies are in cm−1.
Fitting parameters B N and C N for N = 4 − 9.
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