65 citations · 230 across the 17 of their papers we have counts for
17 papers
Holography of Information in a Ball of Finite Radius
Nava Gaddam, Ashik H
The principle of holography of information states that all information available in the bulk of asymptotically flat spacetime is also available near its boundary at spatial infinit…
Black hole - wormhole transitions in two dimensional string theory
Panos Betzios, Nava Gaddam, Olga Papadoulaki
We study charged black hole and wormhole solutions of Type 0A/IIA string theory in two dimensions. There is a competition between Euclidean wormholes and near extremal black holes…
Charged particle scattering near the horizon
Fabiano Feleppa, Nava Gaddam, Nico Groenenboom
We study Maxwell theory, in the presence of charged scalar sources, near the black hole horizon in a partial wave basis. We derive the gauge field configuration that solves Maxwell…
All near-horizon symmetries of the Schwarzschild black hole in linearised gravity
Ankit Aggarwal, Nava Gaddam
Asymptotic symmetries are known to constrain the infrared behaviour of scattering processes in asymptotically flat spacetimes. By the same token, one expects symmetries of the blac…
A toolbox for black hole scattering
Nava Gaddam, Nico Groenenboom
Hawking's free field theory is expected to break down after Page time. In previous work, we have shown that a primary dynamical reason for this breakdown is the dominance of gravit…
Baby Universes born from the Void
Panos Betzios, Nava Gaddam, Olga Papadoulaki
We propose a novel construction of a third quantised baby universe Hilbert space for the quantum gravity path integral. In contrast to the original description o…
Modular bootstrap for D4-D2-D0 indices on compact Calabi-Yau threefolds
Sergei Alexandrov, Nava Gaddam, Jan Manschot +1
We investigate the modularity constraints on the generating series of BPS indices counting D4-D2-D0 bound states with fixed D4-brane charge in type IIA string theory c…
scattering: Eikonalisation and the Page curve
Nava Gaddam, Nico Groenenboom
In the spirit of studying the information paradox as a scattering problem, we pose and answer the following questions: i) What is the scattering amplitude for particles to emer…
Black Hole S-matrix for a scalar field
Panos Betzios, Nava Gaddam, Olga Papadoulaki
We describe a unitary scattering process, as observed from spatial infinity, of massless scalar particles on an asymptotically flat Schwarzschild black hole background. In order to…
Quantum gravity on the black hole horizon
Nava Gaddam, Nico Groenenboom, Gerard 't Hooft
We study scattering on the black hole horizon in a partial wave basis, with an impact parameter of the order of the Schwarzschild radius or less. This resembles the strong gravity…
Soft graviton exchange and the information paradox
Nava Gaddam, Nico Groenenboom
We show that there is a remarkable phase in quantum gravity where gravitational scattering amplitudes mediated by virtual gravitons can be calculated explicitly in effective field…
Black holes, quantum chaos, and the Riemann hypothesis
Panos Betzios, Nava Gaddam, Olga Papadoulaki
Quantum gravity is expected to gauge all global symmetries of effective theories, in the ultraviolet. Inspired by this expectation, we explore the consequences of gauging CPT as a…
Antipodal correlation on the meron wormhole and a bang-crunch universe
Panagiotis Betzios, Nava Gaddam, Olga Papadoulaki
We present a covariant euclidean wormhole solution to Einstein Yang-Mills system and study scalar perturbations analytically. The fluctuation operator has a positive definite spect…
Illustrated study of the semi-holographic non-perturbative framework
Souvik Banerjee, Nava Gaddam, Ayan Mukhopadhyay
Semi-holography has been proposed as an effective nonperturbative framework which can combine perturbative and nonperturbative effects consistently for theories like QCD. It is pos…
The Black Hole S-Matrix from Quantum Mechanics
Panagiotis Betzios, Nava Gaddam, Olga Papadoulaki
We revisit the old black hole S-Matrix construction and its new partial wave expansion of 't Hooft. Inspired by old ideas from non-critical string theory & Matrix Quantum Mec…
Elliptic genera from multi-centers
Nava Gaddam
I show how elliptic genera for various Calabi-Yau threefolds may be understood from supergravity localization using the quantization of the phase space of certain multi-center conf…
Rholography, Black Holes and Scherk-Schwarz
Nava Gaddam, Alessandra Gnecchi, Stefan Vandoren +1
We present both the macroscopic and microscopic description of a class of near-extremal asymptotically flat black hole solutions in four (or five) dimensional gauged supergravity w…