Journal ArticleDOI
Energy of a Boson Fluid with Lennard-Jones Potentials
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In this article, the energy of the ground state of a system of 32 bosons interacting by Lennard-Jones potentials and with periodic boundary conditions is derived for the Schrodinger equation for a large ensemble of particles.Abstract:
A more powerful version of a numerical method published before is given which permits the integration of the Schr\"odinger equation for a large ensemble of particles. A new method for obtaining quantum expectation values is outlined. Numerical results are tabulated for the energy of the ground state of a system of 32 bosons interacting by Lennard-Jones potentials and with periodic boundary conditions. This is a commonly used model of liquid ${\mathrm{He}}^{4}$. The present results are substantially lower and closer to experiment than variational estimates based on a Jastrow-type wave function.read more
Citations
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A quantum-statistical Monte Carlo method; path integrals with boundary conditions
TL;DR: In this article, a new Monte Carlo method for problems in quantum statistical mechanics is described, based on the use of iterated short-time Green's functions, for which "image" approximations are used.
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Magnetism in solid He-3
TL;DR: In this paper, the theory of magnetism in solid materials is reviewed with emphasis on the multiple-spin-exchange theory of the magnetic interaction, and critical experiments are discussed briefly, and the most reliable present values for various quantities are chosen.
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Structure of Water Clusters. The Contribution of Many-Body Forces, Monomer Relaxation, and Vibrational Zero-Point Energy
TL;DR: The vibrationally averaged properties of small water clusters from the dimer to the hexamer are discussed in this paper, where the potential energy surface used contains explicit many-body terms which allow the non-pairwise interactions to be considered.
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Quantum Monte Carlo studies of vibrational states in molecules and clusters
Martin A. Suhm,R. O. Watts +1 more
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Current state of nuclear matter calculations
TL;DR: In this article, the current state of nuclear matter calculations is described with special reference to the present disagreement between the variational and Brueckner-Bethe methods, and practical ways of testing the validity of these mehtods are discussed and illustrated by numerical results taken from the literature.