103 citations · 852 across the 48 of their papers we have counts for
41 papers · 1 filter
Neural Networks Assisted Metropolis-Hastings for Bayesian Estimation of Critical Exponent on Elliptic Black Hole Solution in 4D Using Quantum Perturbation Theory
Armin Hatefi, Ehsan Hatefi, Roberto J. Lopez-Sastre
It is well-known that the critical gravitational collapse produces continuous self-similar solutions characterized by the Choptuik critical exponent, . We examine the solutions…
Sequential Monte Carlo with Cross-validated Neural Networks for Complexity of Hyperbolic Black Hole Solutions in 4D
Armin Hatefi, Ehsan Hatefi
This paper investigates the self-similar solutions of the Einstein-axion-dilaton configuration from type IIB string theory and the global SL(2,R) symmetry. We consider the Continuo…
All-Order Quartic Couplings in Highly Symmetric D-brane-Anti-D-brane Systems
Ehsan Hatefi, Per Sundell
We compute six-point string amplitudes for the scattering of one closed string Ramond-Ramond state, two tachyons, and two gauge fields in the worldvolume of D-brane-anti-D-brane sy…
On Perturbation Theory and Critical Exponents for Self-Similar Systems
Ehsan Hatefi, Adrien Kuntz
Gravitational critical collapse in the Einstein-axion-dilaton system is known to lead to continuous self-similar solutions characterized by the Choptuik critical exponent . We c…
On Higher Dimensional Self-Similar Axion-Dilaton Solutions
Ehsan Hatefi, Eleonora Vanzan
We show that solutions of the self-similar gravitational collapse in the Einstein-axion-dilaton system exist in higher dimensional spacetimes. These solutions are invariant under s…
On Critical Exponents for Self-Similar Collapse
Riccardo Antonelli, Ehsan Hatefi
We explore systematically perturbations of self-similar solutions to the Einstein-axion-dilaton system, whose dynamics are invariant under spacetime dilations combined with interna…