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- W2083283568 abstract "Drops containing 20 to 240 atoms of Bose liquid /sup 4/He and Fermi liquid /sup 3/He are studied by variational Monte Carlo methods as simple examples of correlated inhomogeneous quantum systems. In the present work we report wave functions of natural, quasiparticle, and mean-field orbitals in these drops. The wave functions of natural orbitals are determined by diagonalizing the one-particle density matrix. The condensate fraction and wave function in the Bose-liquid drops are calculated. The quasihole states are defined in the spirit of Landau's theory, and their wave functions are calculated from the overlaps between states containing N and N-1 atoms. In Bose-liquid drops the wave function of the quasihole orbital is similar to that of the condensate; however, in Fermi-liquid drops the quasihole wave functions are different from those of natural or mean-field orbitals. We find that a simple local-density approximation provides an accurate relation between the mean-field and quasihole wave functions for both Bose- and Fermi-liquid drops. The wave functions of natural orbitals are very localized and simple methods to construct them from mean-field wave functions are also discussed. The momentum distributions of atoms in the drops are calculated and compared with those of extended liquids. The deviationsmore » of the momentum distributions from mean-field distributions are also discussed.« less" @default.
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- W2083283568 date "1988-04-01" @default.
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- W2083283568 title "Single-particle orbitals in liquid-helium drops" @default.
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- W2083283568 doi "https://doi.org/10.1103/physrevb.37.4950" @default.
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