The energy conservation in our universe and the pressureless dark energy

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Abstract

Recent observations confirm that a certain amount of unknown dark energy exists in our universe so that the current expansion of our universe is accelerating. It is commonly believed that the pressure of the dark energy is negative and the density of the dark energy is almost a constant throughout the universe expansion. In this paper, we show that the law of energy conservation in our universe has to be modified because more vacuum energy is gained due to the universe expansion. As a result, the pressure of dark energy would be zero if the total energy of our universe is increasing. This pressureless dark energy model basically agrees with the current observational results. Copyright © 2015 Man Ho Chan.
Original languageEnglish
Article number384673
JournalJournal of Gravity
Volume2015
DOIs
Publication statusPublished - 2015

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energy conservation
dark energy
universe
expansion
vacuum
energy

Citation

Chan, M. H. (2015). The energy conservation in our universe and the pressureless dark energy. Journal of Gravity, 2015, 384673. Retrieved from http://dx.doi.org/10.1155/2015/384673.