145 citations · 2.1k across the 96 of their papers we have counts for
9 papers · 1 filter
Annihilation-to-nothing: a quantum gravitational boundary condition for the Schwarzschild black hole
Mariam Bouhmadi-López, Suddhasattwa Brahma, Che-Yu Chen +2
The interior of a static Schwarzschild metric can be written in terms of two functions, similar to some models of anisotropic cosmology. With a suitable choice of canonical variabl…
Deformed covariance in spherically symmetric vacuum models of loop quantum gravity: Consistency in Euclidean and self-dual gravity
Martin Bojowald, Suddhasattwa Brahma, Ding Ding +1
Different versions of consistent canonical realizations of hypersurface deformations of spherically symmetric space-times have been derived in models of loop quantum gravity, modif…
The trans-Planckian censorship conjecture from the swampland distance conjecture
Suddhasattwa Brahma
Starting from the swampland distance conjecture, and using the species bound for a large number of weakly-coupled particles, we give a derivation of the recently proposed trans-Pla…
Trans-Planckian censorship, inflation and excited initial states for perturbations
Suddhasattwa Brahma
The recently proposed trans-Planckian censorship conjecture (TCC) seems to require that the energy scale of inflation is significantly lower than the Planck scale $(H_\text{inf}<10…
Can a false vacuum bubble remove the singularity inside a black hole?
Suddhasattwa Brahma, Dong-han Yeom
We investigate a regular black hole model with a de Sitter-like core at its center. This type of a black hole model with a false vacuum core was introduced with the hope of singula…
Stochastic eternal inflation is in the swampland
Suddhasattwa Brahma, Sarah Shandera
We demonstrate that there is no controlled description of stochastic eternal inflation consistent with the refined swampland de Sitter conjecture.
Relating the scalar weak gravity conjecture and the swampland distance conjecture for an accelerating universe
Suddhasattwa Brahma, Md. Wali Hossain
For any quasi de Sitter background, we show that a recently proposed scalar weak gravity conjecture (sWGC) follows from the swampland distance conjecture, together with the covaria…
Dark energy beyond quintessence: Constraints from the swampland
Suddhasattwa Brahma, Md. Wali Hossain
The string theory swampland proposes that there is no UV-completion for an effective field theory with an exact (metastable) de Sitter vacua, thereby ruling out standard CDM cos…
Asymptotic non-flatness of an effective black hole model based on loop quantum gravity
Mariam Bouhmadi-López, Suddhasattwa Brahma, Che-Yu Chen +2
For any non-rotating effective quantum (uncharged) black hole model to be viable, its asymptotic structure of spacetime should reduce to that of a Schwarzschild black hole. After e…