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Correlated Isocurvature Fluctuation of Quintessence and Curvaton Scenario
Takeo Moroi, Tomo Takahashi
We consider cosmic microwave background (CMB) anisotropy in models with quintessence taking into account of isocurvature fluctuation in the quintessence. It is shown that, if the p…
Making waves on CMB power spectrum and inflaton dynamics
Masahiro Kawasaki, Fuminobu Takahashi, Tomo Takahashi
We discuss cosmic microwave background anisotropies in models with an unconventional primordial power spectrum. In particular, we consider an initial power spectrum with some ``spi…
Bigger Rip with No Dark Energy
Paul H. Frampton, Tomo Takahashi
By studying a modified Friedmann equation which arises in an extension of general relativity which accommodates a time-dependent fundamental length , we consider cosmological…
Candidates for Inflaton in Quiver Gauge Theory
Paul H. Frampton, Tomo Takahashi
The inflaton necessary to implement the mechanism of inflationary cosmology has natural candidates in quiver gauge theory. We discuss the dimensionless coefficients of quartic coup…