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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 …
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 …
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 …
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 …
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 …
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 …
a scalar field coupled to the string tachyon field (CSTB cosmos). By explicit computation of …