81 citations · 280 across the 20 of their papers we have counts for
20 papers
Large Quantum Gravity Fluctuations of BTZ Black Holes
Ben Freivogel, Upamanyu Moitra
We study the quantum fluctuations of the black hole horizon in three-dimensional Anti-de Sitter (AdS) spacetime. We define a precise protocol to calculate the horizon fluctuations…
Duality-Invariant Higher-Derivative Corrections to Charged Stringy Black Holes
Upamanyu Moitra
We study duality-invariant higher-derivative corrections to the charged black hole geometry in two-dimensional heterotic string theory. We illustrate how the conventional perturbat…
Heterotic Black Holes in Duality-Invariant Formalism
Upamanyu Moitra
We consider the effective theory of heterotic strings in two spacetime dimensions, in a double field theory-inspired formalism, manifestly consistent with -duality in string the…
Quantum Entanglement Index in String Theory
Atish Dabholkar, Eleanor Harris, Upamanyu Moitra
We define a notion of `quantum entanglement index' with the aim to compute it for black hole horizons in string theory at one-loop order using the stringy replica method. We consid…
Finite Cut-Off Holography and the DBI Counter-Term
Dileep P. Jatkar, Upamanyu Moitra
We demonstrate some very special features of the Dirac-Born-Infeld--like (DBI) gravitational counter-term in AdS spacetime, in the context of holography with a sharp radial cut…
Heterotic Strings and Quantum Entanglement
Atish Dabholkar, Upamanyu Moitra
We construct orbifolds of the ten-dimensional heterotic string theories appropriate for implementing the stringy replica method for the calculation of quantum entang…
Quantum Entanglement on Black Hole Horizons in String Theory and Holography
Atish Dabholkar, Upamanyu Moitra
We compute the exact one-loop partition function of orbifolds of Euclidean BTZ black hole with the aim to compute the entanglement entropy of the black hole horizon…
Entanglement Entropy in String Compactifications
Atish Dabholkar, Upamanyu Moitra
We consider orbifolds of Type-II compactifications to four and six dimensions on several Calabi-Yau manifolds in the orbifold limit with the aim to compute the entan…
Finite Entanglement Entropy in String Theory
Atish Dabholkar, Upamanyu Moitra
We analyze the one-loop quantum entanglement entropy in ten-dimensional Type-II string theory using the orbifold method by analytically continuing in the genus-one partition fu…
Newton vs. Coulomb in AdS/CFT and the Weak Gravity Conjecture
Upamanyu Moitra
We study (near-)circular orbits of charged particles in the background of charged black holes in asymptotically Anti-de Sitter (AdS) spacetimes of arbitrary dimensionality. We calc…
Dirac-Born-Infeld Counter-Term and Black Hole Thermodynamics
Dileep P. Jatkar, Upamanyu Moitra
We revisit the Dirac-Born-Infeld--like boundary counter-term for four dimensional theory of gravity. We show that it correctly executes complete background subtraction for both asy…
Self-Similar Gravitational Dynamics, Singularities and Criticality in 2D
Upamanyu Moitra
We initiate a systematic study of continuously self-similar (CSS) gravitational dynamics in two dimensions, motivated by critical phenomena observed in higher dimensional gravitati…
Aspects of Jackiw-Teitelboim Gravity in Anti-de Sitter and de Sitter spacetime
Upamanyu Moitra, Sunil Kumar Sake, Sandip P. Trivedi
We discuss JT gravity in AdS and dS space in the second order formalism. For the pure dS JT theory without matter, we show that the path integral gives rise in general to the Hartl…
Jackiw-Teitelboim Gravity in the Second Order Formalism
Upamanyu Moitra, Sunil Kumar Sake, Sandip P. Trivedi
We formulate the path integral for Jackiw-Teitelboim gravity in the second order formalism working directly with the metric and the dilaton. We consider the theory both in Anti-de…
Strong Cosmic Censorship in Two Dimensions
Upamanyu Moitra
We study the behaviour of a free massive scalar wave-packet near the Cauchy horizon of an black hole and find that it becomes infinitely differentiable for smooth…
Near-Extremal Fluid Mechanics
Upamanyu Moitra, Sunil Kumar Sake, Sandip P. Trivedi
We analyse near-extremal black brane configurations in asymptotically spacetime with the temperature , chemical potential , and three-velocity , varying…
Jackiw-Teitelboim Model Coupled to Conformal Matter in the Semi-Classical Limit
Upamanyu Moitra, Sunil Kumar Sake, Sandip P. Trivedi +1
We analyse the Jackiw-Teitelboim model of 2D gravity coupled to massless free scalar fields in the semi-classical limit. Two systems are studied which essentially differ in the…
Jackiw-Teitelboim Gravity and Rotating Black Holes
Upamanyu Moitra, Sunil Kumar Sake, Sandip P. Trivedi +1
We show that the free energy at low temperatures for near-extremal black holes is correctly obtained from the Jackiw-Teitelboim (JT) model of gravity. Our arguments apply to all bl…
Entanglement Entropy, Relative Entropy and Duality
Upamanyu Moitra, Ronak M Soni, Sandip P. Trivedi
A definition for the entanglement entropy in both Abelian and non-Abelian gauge theories has been given in the literature, based on an extended Hilbert space construction. The resu…
Extremal and Near-Extremal Black Holes and Near-
Upamanyu Moitra, Sandip P. Trivedi, V. Vishal
We study the behaviour of extremal and near-extremal black holes at low energies and low temperatures and find that it can be understood from the near-horizon region. Our a…