596 citations
- Indian Centre for Space PhysicsIN143 papers
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4 papers · 2 filters
2+1 Quantum Gravity with Barbero-Immirzi like parameter on Toric Spatial Foliation
Rudranil Basu, Samir K Paul
We consider gravity in 2+1 space-time dimensions, with negative cosmological constant and a `Barbero-Immirzi' (B-I) like parameter, when the space-time topology is of the form $ T^…
Entropy of Isolated Horizons revisited
Rudranil Basu, Romesh K. Kaul, Parthasarathi Majumdar
The decade-old formulation of the isolated horizon classically and within loop quantum gravity, and the extraction of the microcanonical entropy of such a horizon from this formula…
Gödel black hole, closed timelike horizon, and the study of particle emissions
Sourav Bhattacharya, Anirban Saha
We show that a particle, with positive orbital angular momentum, following an outgoing null/timelike geodesic, shall never reach the closed timelike horizon (CTH) present in the $(…
Estimating Temperature Fluctuations in the Early Universe
Debashis Gangopadhyay
A lagrangian for the essence field is constructed for a constant scalar potential and its form determined when the scale factor was very small compared to the present epoch bu…