5 papers
Mutual Information of Measurement in Conformal Field Theories
Israel Klich, Ravisankar Rajagopal, Diana Vaman
The mutual information of measurement of a local operator between two spatial regions characterizes the reduction in the uncertainty of measurement outcomes in one region given the…
An elementary approach to the Szegő theorems
Israel Klich, Ravisankar Rajagopal
The strong Szegő theorem and the Fisher-Hartwig formula describe the asymptotic behavior of determinants obtained by restricting translationally invariant operators to large finite…
Higher-Derivative Corrections to Reissner--Nordström Black Holes from Worldline QFT
Siddarth Ajith, Ravisankar Rajagopal, Nur Rifat +2
In this paper we derived the corrections to the Reissner-Nordström black hole when higher-derivative terms (contractions of the Riemann tensor with the Maxwell field strengt…
Worldline Formalism, Eikonal Expansion and the Classical Limit of Scattering Amplitudes
Siddarth Ajith, Yuchen Du, Ravisankar Rajagopal +1
We revisit the fundamentals of two different methods for calculating classical observables: the eikonal method, which is a scattering amplitude-based method, and the worldline quan…
Worldline Proof of Eikonal Exponentiation
Yuchen Du, Siddarth Ajith, Ravisankar Rajagopal +1
In this paper, working in the eikonal approximation, we present a proof for the exponentiation of the 2-body eikonal phase to {\it all orders in the eikonal expansion}, for scalar…