4 citations · 4 across the 2 of their papers we have counts for
4 papers
Issues on the cosmological constant
Jun'ichi Yokoyama
Some issues of the cosmological constant or dark energy are briefly reviewed. There are an increasing number of observations that constrain the equation of state of dark energy mor…
Degenerate vacua as the origin of the dark energy
Jun'ichi Yokoyama
I propose a new mechanism to account for the observed tiny but finite dark energy in terms of a non-Abelian Higgs theory, which has infinitely many perturbative vacua characterized…
On the origin of the cosmological constant
Jun'ichi Yokoyama
Under the assumption that the cosmological constant vanishes in the true ground state with lowest possible energy density, we argue that the observed small but finite vacuum-like e…
Density Fluctuations in Inflationary Models with Multiple Scalar Fields
Jun'ichi Yokoyama
Making use of the primordially isocurvature fluctuations, which are generated in inflationary models with multiple scalar fields, we make a phenomenological model that predicts for…