Dark energy with the help of interacting dark sectors

JM Gomes, E Hardy, S Parameswaran - Physical Review D, 2024 - APS
We analyze theories that do not have a de Sitter vacuum and cannot lead to slow-roll
quintessence, but which nevertheless support a transient era of accelerated cosmological …

Dark energy with a little help from its friends

JM Gomes, E Hardy, S Parameswaran - arxiv preprint arxiv:2311.08888, 2023 - arxiv.org
We analyse theories that do not have a de Sitter vacuum and cannot lead to slow-roll
quintessence, but which nevertheless support a transient era of accelerated cosmological …

[HTML][HTML] Higgs inflation from new Kähler potential

S Choudhury, T Chakraborty, S Pal - Nuclear Physics B, 2014 - Elsevier
We introduce a new class of models of Higgs inflation using the superconformal approach to
supergravity by modifying the Kähler geometry. Using the above-mentioned mechanism, we …

The scale invariant power spectrum of the primordial curvature perturbations from the coupled scalar tachyon bounce cosmos

C Li, YKE Cheung - Journal of Cosmology and Astroparticle …, 2014 - iopscience.iop.org
We investigate the spectrum of cosmological perturbations in a bounce cosmos modeled by
a scalar field coupled to the string tachyon field (CSTB cosmos). By explicit computation of …

Dualities between scale invariant and magnitude invariant perturbation spectra in inflationary/bouncing cosmos

C Li, YKE Cheung - arxiv preprint arxiv:1211.1610, 2012 - arxiv.org
We study cosmological perturbation spectra using the dynamical equations of gauge
invariant perturbations with a generalized blue/red-shift term. Combined with the power-law …

The Scale-invariant Power Spectrum of Primordial Curvature Perturbation in CSTB Cosmos

C Li, YKE Cheung - arxiv preprint arxiv:1401.0094, 2013 - arxiv.org
We investigate the spectrum of cosmological perturbations in a bounce cosmos modeled by
a scalar field coupled to the string tachyon field (CSTB cosmos). By explicit computation of …