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Proceedings of the Third International Conference on Recent Progress in Many-Body Theories Held at Odenthal-Altenberg, Germany August 29 – September 3, 1983
We describe a Monte-Carlo algorithm to solve exactly the ground-state problem for a system of up to four nucleons interacting via a scalar neutral meson field. The mesonic degrees of freedom are treated exactly without recourse to the potential approximation.
In central heavy-ion collisions at ultra relativistic energies, the central rapidity regime is expected to expand hydrodynamically. The hydrodynamic equations governing this behaviour are reviewed and numerical solutions are given for the ideal case of constant sound velocity. The cylindrical geometry, appropriate for central collisions, leads to a very rapid cooling of the matter, implying that a...
The results of a numerical study on the stability of neutron matter against neutral pion condensation are reported. Within the framework of a Jastrow-like variational approach, in which the Reid soft core potential has been modified to simulate Δ-resonance effects, the condensate phase turns out to be energetically favoured at densities larger than normal nuclear density by a factor 3÷4.
Inclusion of the tensor q.p. interaction modifies the formulae of the Fermi liquid theory of nuclear matter. The calculations performed using several sets of the spin dependent Fermi liquid parameters show that the effect of tensor forces may be important. In particular, for the q.p. interaction derived using variational methods from the RSC and BJ N-N potentials, tensor forces imply instability of...
The solution to the Ornstein-Zernike Equation for a liquid with a free surface is formulated in terms of an integral eigenvalue problem. We discuss the properties of the integral kernel and its associated eigenfunctions and eigenvalues. Our method is then applied to the zero-temperature free surface of liquid 4He.
The ability of a variational calculation with a Jastrow-Slater trial function to yield the leading terms in the ground state energy of a low density hard sphere fermi gas is discussed. A cluster expansion of the variational trial energy is developed which fully includes exchange processes between particles in the cluster and the other particles of the medium. The result, however, is that the spin-degeneracy...
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