Correlation Functions of Coulomb Pair
The correlation functions of two electrostatically interacting particles have been obtained for the first time, by using the direct algebraic method for finding the cross-correlation functions. The efficiency of this method has been demonstrated by finding almost all unknown elements of the decomposition matrices in the second-order approximation.
M.F. Sarry, Usp. Fiz. Nauk 161, 47 (1991). https://doi.org/10.3367/UFNr.0161.199111b.0047
N.N. Bogolyubov and N.N. Bogolyubov, jr., Introduction to Quantum Statistical Mechanics (Gordon and Breach, New York, 1992).