State nder diagnostic for exponential harmonic eld

Abstract

The dynamic study of the harmonic exponential eld has been made using the state nder diagnostic. By the use of a speci c method, we nd out the state nder parameters r, s according to the deceleration parameter and the redshift. The numerical analysis of these parameters brings out the transition between the accelerated and decelerated phases of the universe. There is also an attracting e ect from the SCDM (Standard Cold Dark Matter) model toward the LCDM model (CDM). In view of the results this study allows us to classify the exponential harmonic eld among the quintessential models.