Author(s): R.K. Mishra & A.K. Pandey
Abstract The best candidate source for dark energy is the energy contained in vacuum fluctuations (otherwise known as zero point energy). As mentioned in this paper cosmologists trying hard to know th e amount of energy in the vacuum, and they came to a result that is 10120 times larger than amount of dark energy required for accelerating the expansion of our universe. Through the recent studies, it is firmly established that the hypothetical fluid (dark energy) is tied to the Einstein’s cosmological constant ?. It is also much speculated that the most interesting candidate of dark energy is the Vacuum Energy and the cosmological model in which ? is assumed to be the source of dark energy, is called ?CDM model.