EFFECT OF THREE-BODY CLUSTERS IN THE GROUND-STATE PROPERTIES OF SPIN-POLARIZED LIQUID ³ He
Razavifar Z., Rajabi A.

Поступила в редакцию: 15 Марта 2014

DOI: 10.7868/S0044451014100034

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The ground-state energy of polarized and unpolarized liquid ³ He is calculated using the variational theory. A variational wave function is constrained to be normalized appropriately by including the three-body terms in the cluster expansion of the two-body radial distribution function. The higher-order terms have been found to be important to obtain an equation of state which is in agreement with experimental data. The saturation density of unpolarized liquid ³ He was found to be 0.267 σ^-3, which decreases by enhancing the polarization. For all relevant densities, the ground-state energy of the spin-polarized system is higher than that in the unpolarized case.