A NEW APPROACH TO THE CALCULATION OF THE THERMODYNAMIC POTENTIAL
OF INHOMOGENEOUS ELECTRON GAS
Author(s): P.P.Kostrobij, B.M.Markovych (Lviv Polytechnic National University 12 S.Bandera Str., 79013 Lviv, Ukraine)
A new approach is proposed to calculate the thermodynamic potential, which consists in reducing the relevant non-Gaussian functional integral to its Gaussian form with a renormalized ``density-density'' correlator. It is shown that the knowledge of the effective potential of electron-electron interaction is sufficient to calculate the thermodynamic potential in this approach.
Key words: effective potential, functional integral
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