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- W2000442874 abstract "A theory of the normal ground state of liquid ${mathrm{He}}^{3}$ is constructed using matrix elements in a representation of correlated basis functions. The Rayleigh-Schrodinger perturbation theory is adapted to our nonorthogonal basis. Several means of classifying terms are avaiable; one of them is recognized as best suited for the study of liquid ${mathrm{He}}^{3}$. To the second order in the classification scheme, the following ground-state properties are calculated and compared with experiment and results of the Brueckner-Gammel theory: energy per particle, equilibrium density, compressibility, velocity of sound, and paramagnetic susceptibility. The radial distribution function of liquid ${mathrm{He}}^{3}$ at zero temperature is also calculated. A study of the Lowdin transformation as a procedure for orthogonalizing the correlated basis shows that the correction to the Hamiltonian involves unphysical $N$ dependences; these arise out of high-order irreducible clusters and unlinked diagrams. It is verified that the unphysical terms cancel out completely in each of several lowest orders." @default.
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- W2000442874 date "1966-11-04" @default.
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- W2000442874 title "Theory of the (Normal) Ground State of Liquid Helium Three" @default.
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- W2000442874 doi "https://doi.org/10.1103/physrev.151.138" @default.
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