Dark energy as a manifestation of the non-constant cosmological constant |
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| Authors: | Murli Manohar Verma |
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| Institution: | 1.Department of Physics,Lucknow University,Lucknow,India;2.The Abdus Salam International Centre for Theoretical Physics,Trieste,Italy |
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| Abstract: | We propose a time-varying cosmological constant with a fixed equation of state, which evolves mainly through its interaction
with the background during most of the long history of the universe. However, such an interaction does not exist in the very
early- and the late-time universe and this produces the acceleration during these eras when it becomes very nearly a constant.
It is found that after the initial inflationary phase, the cosmological constant, which we call the lambda parameter, rolls
down from a large constant value to another but very small constant value and further dominates the present epoch showing
up in the form of dark energy, driving the acceleration. |
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