Hartree-Fock Approximation and Entanglement
arXiv:0704.3130
Abstract
The relation between the correlation energy and the entanglement is analytically constructed for the Moshinsky's model of two coupled harmonic oscillators. It turns out that the two quantities are far to be proportional, even at very small couplings. A comparison is made also with the 2-point Ising model.
20 pages, 10 figures