Ch. Choi et al., APPLICATION OF OPERATOR ALGEBRA TECHNIQUE TO SOME PROBLEMS IN CONDENSED MATTER PHYSICS, Canadian journal of physics, 72(9-10), 1994, pp. 596-600
We prove that the relaxation functions in condensed matter physics can
be easily calculated by the operator algebra technique in the continu
ed fraction representation scheme. The Dyson equation for the single p
article Green's function in the Hubbard model obtained in this way is
identical with the one derived by Fedro and Willson in the lowest orde
r approximation. And the cyclotron transition absorption formula obtai
ned by this technique is identical with that of Argyres and Sigel.