Study of Particle Creation with Quadratic Equation of State in Higher Derivative Theory

Abstract

We investigate the effect of particle creation in flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime under the higher derivative theory composition. The exact solution of the field equation in higher derivative theory is obtained by considering the quadratic equation of state, p = ωρ 2 − ρ and different forms of deceleration parameter. The physical acceptance and stability of the models are explored by discussing energy conditions and squared sound speed. In addition to that, the statefinder diagnostic pair {r, s} is also scrutinized to measure the deviation of considered models from cold dark matter (CDM) model.

Angiospermic Biodiversity of Lucknow Areas of Uttar Pradesh, India

“…The particle creation mechanism by an external gravitational field in cosmological modeling has been studied by Parker [16]. There has been lots of discussion on the production of matter in an expanding universe [17][18][19][20][21][22][23][24][25]. The particle creation mechanism may yield cosmological scenarios with non-equilibrium thermodynamical descriptions ranging from inflation to late-time acceleration [26].…”