the role of dark energy in the early universe was big bang.
the role of dark energy in the early universe was big bang.
what was the role of dark energy in the early universe?
big bang
alan guth and alexei starobinsky proposed in 1980 that a negative pressure field, similar in concept to dark energy, could drive cosmic inflation in the very early universe. inflation postulates that some repulsive force, qualitatively similar to dark energy, resulted in an enormous and exponential expansion of the universe slightly after the big bang. such expansion is an essential feature of most current models of the big bang. however, inflation must have occurred at a much higher energy density than the dark energy we observe today and is thought to have completely ended when the universe was just a fraction of a second old. it is unclear what relation, if any, exists between dark energy and inflation. even after inflationary models became accepted, the cosmological constant was thought to be irrelevant to the current universe.
dark energy
the expansion history and large-scale structure of the universe is a key prediction of cosmological models, and desi observations will permit scientists to probe diverse aspects of cosmology, from dark energy to alternatives to general relativity to neutrino masses to the early universe. the data from desi will be used to create three-dimensional maps of the distribution of matter covering an unprecedented volume of the universe with unparalleled detail. this will provide insight into the nature of dark energy and establish whether cosmic acceleration is due to a cosmic-scale modification of general relativity. desi will be transformative in the understanding of dark energy and the expansion rate of the universe at early times, one of the greatest mysteries in the understanding of the physical laws.
dark energy spectroscopic instrument