Sudipta Das
Articles written in Pramana – Journal of Physics
Volume 74 Issue 3 March 2010 pp L481-L489 Rapid Communication
Chameleon field and the late time acceleration of the Universe
Narayan Banerjee Sudipta Das Koyel Ganguly
In the present work, it is shown that a chameleon scalar field having a non-minimal coupling with dark matter can give rise to a smooth transition from a decelerated to an accelerated phase of expansion for the Universe. It is surprising to note that the coupling with the chameleon scalar field hardly affects the evolution of the dark matter sector, which still redshifts as $a^{−3}$.
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