2005•Unpublished venueRequires access
Dark energy and de Sitter space
Cai Rong
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Abstract
Recent astronomical observations indicate that expansion of our universe is speeding up, rather than slowing down. To explain this accelerated expansion, the energy density of the universe has to include a dark energy component. In this article we discuss possible candidates for the dark energy. In particular, we emphasize the cosmological constant, cosmological constant problem, de Sitter space and various related fundamental problems.