A COSMOLOGICAL MODEL WITH FERMIONIC FIELD

作者：Rakhi R^*; Vijayagovindan G V; Indulekha K

来源：International Journal of Modern Physics A, 2010, 25(13): 2735-2746.

DOI：10.1142/S0217751X10049025

• Cosmological models
• string theory
• fermionic field
• interaction term

In this work, a cosmological model inspired by string/M-theory with fermionic field is taken into consideration. Here it is investigated whether the introduction of a non-Dirac fermionic field - characterized by an interaction term - affects the cosmological evolution. The self-interaction potential is considered as a combination of the scalar and pseudoscalar invariants. It is observed that the fermionic field under consideration behaves like an inflation field for the early universe and later on, as a dark energy field. The late time acceleration becomes more prominent by the addition of the interaction term. There is a slight decrease for the inflation peak as well as for the energy density. We see that the addition of higher-order terms to the fermionic part of Lagrangian does not significantly change either the inflation or the late time acceleration behavior.

• 出版日期2010-5-20