69 citations · 300 across the 29 of their papers we have counts for
30 papers
Exact Solutions with Asymptotically Flat Galactic Rotation Curves
Sandipan Sengupta
We present a new set of spacetime solutions for spiral galaxies corresponding to flat rotation curves at large distances. These correspond to anisotropic pressure, which could be s…
Canonical Gravity in Degenerate Limit
Sandipan Sengupta
We construct a limit of Hamiltonian gravity as the determinant of the spatial triad (and hence of the four-metric) goes to zero. Within the Barbero-Immirzi SU (2) formulation, we p…
A discrete discontinuity between the two phases of gravity
Sandipan Sengupta
When tetrad (metric) fields are not invertible, the standard canonical formulation of gravity cannot be adopted as it is. Here we develop a Hamiltonian theory of gravity for non-in…
Hamiltonian form of `Carroll' gravity
Sandipan Sengupta
We develop a Hamiltonian description of the `Carroll' (Levy Leblond-Sen Gupta) limit of gravity theory in the first-order formalism. Through a constraint analysis, the number of lo…
The Life and Science of Thanu Padmanabhan
Jasjeet Singh Bagla, Krishnakanta Bhattacharya, Sumanta Chakraborty +21
Thanu Padmanabhan was a renowned Indian theoretical physicist known for his research in general relativity, cosmology, and quantum gravity. In an extraordinary career spanning fort…
Two-dimensional gravity from vanishing metrical dimensions
Suvikranth Gera, Sandipan Sengupta
We obtain a dynamical formulation of two-dimensional gravity from a non-Einsteinian phase in higher dimensions . The formalism is associated with (at least) one extra dim…