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Two-time Green's functions and the spectral density method in nonextensive classical statistical mechanics
A Cavallo1, F Cosenza, L De Cesare
1Dipartimento di Fisica E. R. Caianiello, Università degli Studi di Salerno, I-84081 Baronissi, Italy.
Physical Review Letters
|December 12, 2001
Abstract:
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.