Two-time Green's functions and the spectral density method in nonextensive classical statistical mechanics.
The two-time retarded and advanced Green's function technique is formulated in nonextensive classical statistical mechanics within the optimal Lagrange multiplier framework. The main spectral properties are presented and a spectral decomposition for the spectral density is obtained. Finally, the nonextensive version of the spectral density method is given and its effectiveness is tested by exploring the equilibrium properties of a classical ferromagnetic spin chain.
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Dipartimento di Fisica E. R. Caianiello, Università degli Studi di Salerno, I-84081 Baronissi, Italy.
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