An attempt to separate the long and short range forces by Gaussian method

Abstract

In the study of phase transition problems, short range forces (SRF) play a dominant role. A constructive and rigorous study of the effects of short range forces has yet to be given. It is suggested in the present paper that by separating long range forces (LRF) from the short range forces, it would be possible to estimate contributions to the virial expansion of the collective oscillations due to short range forces. The method of Stratonovich or the functional integration technique is employed in the treatment of the interaction term of the partition function