170 citations · 528 across the 11 of their papers we have counts for
6 papers · 1 filter
Information retrieval from black holes
Kinjalk Lochan, Sumanta Chakraborty, T. Padmanabhan
It is generally believed that, when matter collapses to form a black hole, the complete information about the initial state of the matter cannot be retrieved by future asymptotic o…
Unruh effect for inertial observers through vacuum correlations
Kinjalk Lochan, Sumanta Chakraborty, T. Padmanabhan
We study a dynamic version of the Unruh effect in a two dimensional collapse model forming a black hole. In this two-dimensional collapse model a scalar field coupled to the dilato…
Variational Principle for Gravity with Null and Non-null boundaries: A Unified Boundary Counter-term
Krishnamohan Parattu, Sumanta Chakraborty, T. Padmanabhan
It is common knowledge that the Einstein-Hilbert action does not furnish a well-posed variational principle. The usual solution to this problem is to add an extra boundary term to…
Thermodynamical interpretation of the geometrical variables associated with null surfaces
Sumanta Chakraborty, T. Padmanabhan
The emergent gravity paradigm interprets gravitational field equations as describing the thermodynamic limit of the underlying statistical mechanics of microscopic degrees of freed…
A quantum peek inside the black hole event horizon
Sumanta Chakraborty, Suprit Singh, T. Padmanabhan
We solve the Klein-Gordon equation for a scalar field, in the background geometry of a dust cloud collapsing to form a black hole, everywhere in the (1+1) spacetime: that is, both…
A Boundary Term for the Gravitational Action with Null Boundaries
Krishnamohan Parattu, Sumanta Chakraborty, Bibhas Ranjan Majhi +1
Constructing a well-posed variational principle is a non-trivial issue in general relativity. For spacelike and timelike boundaries, one knows that the addition of the Gibbons-Hawk…