Article
Elementary Derivation of the N-th Moment of Magnetic Resonance Absorption Lines from Sum Rules for Two Time Green Functions
Autor
Martín-Landrove, Miguel
Moreno, José A.
Institución
Resumen
This paper presents an elementary derivation for the nth moment of magnetic resonance linear response lineshape using sum rules for two time retarded Green's functions. The results can be particularized to the high temperature regime where van Vleck's well-known relations are obtained.