Robert Jastrow
نویسندگان
چکیده
منابع مشابه
Jastrow functions in double-β decay
We use simple analytic considerations and a Monte Carlo calculation of nucleons in a box to argue that the use of Jastrow functions as short-range correlators in the commonly employed two-body cluster approximation causes significant errors in the matrix elements for double-β decay. The Jastrow approach appears to agree with others, however, if many-body clusters are included. A careful treatme...
متن کاملVariance-minimization scheme for optimizing Jastrow factors
We describe a scheme for optimizing many-electron trial wave functions by minimizing the unreweighted variance of the energy using stochastic integration and correlated-sampling techniques. The scheme is restricted to parameters that are linear in the exponent of a Jastrow correlation factor, which are the most important parameters in the wave functions we use. The scheme is highly efficient an...
متن کاملJastrow correlation factor for atoms, molecules, and solids
Many-electron wave functions may be accurately and compactly approximated by a product of a small number of Slater determinants and a positive Jastrow correlation factor. The Jastrow factor is an explicit function of the electronelectron separations, so that expectation values calculated with a Slater-Jastrow wave function do not separate in the electron coordinates. Nevertheless, the variation...
متن کاملState-dependent Jastrow correlation functions for He nuclei
We calculate the ground-state energy for the nucleus 4He with V4 nucleon interactions, making use of a Jastrow description of the corresponding wavefunction with state-dependent correlation factors. The effect related to the state dependence of the correlation is quite important, lowering the upper bound for the ground-state energy by some 2 MeV. The physical problem of describing many interact...
متن کاملQuantum Monte Carlo with Jastrow-valence-bond wave functions.
We consider the use in quantum Monte Carlo calculations of two types of valence bond wave functions based on strictly localized active orbitals, namely valence bond self-consistent-field and breathing-orbital valence bond wave functions. Complemented by a Jastrow factor, these Jastrow-valence-bond wave functions are tested by computing the equilibrium well depths of the four diatomic molecules ...
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ژورنال
عنوان ژورنال: Physics Today
سال: 2008
ISSN: 0031-9228,1945-0699
DOI: 10.1063/1.2970220