Aspects of the cosmological “coincidence problem”
Aspects of the cosmological “coincidence problem”
The observational fact that the present values of the densities of dark energy and dark matter are of the same order of magnitude, $$\rho _{\mathrm{de}0}/\rho _{\mathrm{dm}0} \sim \mathcal {O}(1)$$ , seems to indicate that we are currently living in a very special period of the cosmic history. Within the standard …