145 citations · 2.1k across the 96 of their papers we have counts for
7 papers · 1 filter
Transient de Sitter and Quasi de Sitter States in SO(32) and E_8 x E_8 Heterotic String Theories
Keshav Dasgupta, Suddhasattwa Brahma, Bohdan Kulinich +3
One of the long-standing puzzles in string theory has been on the existence of a four-dimensional de Sitter and quasi de Sitter configurations, the latter being defined with a temp…
Heterotic Warm Inflation
Arjun Berera, Heliudson Bernardo, Suddhasattwa Brahma +3
We propose a two-field model of warm inflation motivated by a heterotic string construction, involving an axion and a dilaton-like scalar field with non-trivial kinetic mixing. Gau…
Twisting inflation to sub-Planckian axion decay constants
Peter Adshead, Suddhasattwa Brahma, Indranil Das
We study pseudoscalar inflation in the Einstein-Cartan-Palatini (first-order) formulation of gravity while allowing for torsion. We introduce two non-minimal interactions in the gr…
Hawking evaporation and the fate of black holes in loop quantum gravity
Idrus Husin Belfaqih, Martin Bojowald, Suddhasattwa Brahma +1
A recent covariant formulation, that includes non-perturbative effects from loop quantum gravity (LQG) as self-consistent effective models, has revealed the possibility of non-sing…
Is the CMB revealing signs of pre-inflationary physics?
Suddhasattwa Brahma, Jaime Calderón-Figueroa
Given the latest observational constraints coming from the joint analyses of the Atacama Cosmology Telescope, the Planck Satellite and other missions, we point out the possibility…
The early universe is -ing
Arjun Berera, Suddhasattwa Brahma, Zizang Qiu +2
The recently released data from the (ACT) confirms that the primordial scalar spectrum is extremely flat. This, together with current upper b…
Probing the self-coherence of primordial quantum fluctuations with complexity
Arpan Bhattacharyya, Suddhasattwa Brahma, S. Shajidul Haque +2
A smoking gun for our current paradigm of the early universe would be direct evidence for the quantum mechanical origin of density perturbations which are conjectured to seed the l…