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What is Spintessence and Cosmic Acceleration about?

This paper analytically shows that a spintessence model, with a complex scalar field and potential dependent on the field amplitude, can provide early deceleration and current acceleration in a dust-dominated universe. The model exhibits a transition from positive to negative values of the deceleration parameter q at a finite scale factor, satisfying observational constraints. Exact solutions are derived for scale factor, Hubble parameter and q as functions of cosmic time, demonstrating deceleration at high

Author

Pollmqc

Language

EN