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VARIATIONAL CALCULATIONS FOR NORMAL LIQUID ³He AT FINITE TEMPERATURE USING THE SPIN-DEPENDENT CORRELATION FUNCTION

G. H. BORDBAR

Department of Physics, Shiraz University, Shiraz 71454, Iran

Corresponding author.

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and

M. J. KARIMI

Department of Physics, Shiraz University, Shiraz 71454, Iran

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https://doi.org/10.1142/S0217979211059280Cited by:6 (Source: Crossref)

Abstract

By considering a spin dependence for the correlation function, the thermodynamic properties of normal liquid ³He have been investigated by employing a lowest order constrained variational approach. It is seen that the spin-singlet state has a smaller contribution in the potential energy of normal liquid ³He with respect to the spin-triplet state. It is seen that at high temperatures, the free energy of normal liquid ³He in cases of spin-dependent and spin-independent correlation functions are nearly identical. The equations of state of these two cases are nearly similar too.

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