A bstract Electric-magnetic duality, the Newman-Janis shift, and double copy all act by elementary operations on three-point amplitudes. At same time, they generate a network of interesting classical solutions spanning from Coulomb charge via dyon to Kerr-Taub-NUT spacetime. We identify amplitudes corresponding each these solutions, working orders in spin, but leading perturbative order. confir...

To investigate the formation mechanism of relativistic jets in active galactic nuclei and micro-quasars, we have developed a new general relativistic magnetohydrodynamic code in Kerr geometry. Here we report on the first numerical simulation of jet formation in a rapidly-rotating (a = 0.95) Kerr black hole magnetosphere. We study cases in which the Keplerian accretion disk is both co-rotating a...

A rigorous theoretical connection between the polarizability spectral density obtained from optical Kerr effect ~OKE! measurement with the correlation function describing solvent-induced optical dephasing detected in photon echo measurements is given. The experimentally obtained spectral density has a more reasonable physical basis than model correlation function descriptions of solvent fluctua...

We analyze the stability of circular geodesics for timelike as well null Kerr BH spacetime with rotation parameter on equatorial plane by Lyapunov analysis. Also, we verify results presenting phase portrait both and geodesics. Further, reviewing Kosambi–Cartan–Chern (KCC) theory, Jacobi present a comparative study methods used analysis

Dielectric tensor for interfaces and individual layers in magnetic multilayer structures" (2000). The magneto-optical Kerr response of metallic magnetic multilayers has been studied by determining the dielectric tensors ͑dielectric functions͒ for individual layers, including the magnetic and nonmagnetic interfacial layers. The diagonal components of these tensors were determined using in situ ell...

We have studied numerically the so-called Bondi-Hoyle (wind) accretion on to a rotating (Kerr) black hole in general relativity. We have used the Kerr-Schild form of the Kerr metric, free of coordinate singularities at the black hole horizon. The ‘test-fluid’ approximation has been adopted, assuming no dynamical evolution of the gravitational field. We have used a recent formulation of the gene...

It’s shown that the rotating dilaton-axion black hole solution can be obtained from GGHS static charged dilaton black hole solution via NewmanJanis method. PACS number(s): 02.30.Dk,04.20.Cv The low energy limit of the heterotic string theory gives an interesting generalization of Einstein-Maxwell theory the Einstein-Maxwell-dilaton axion gravity.The field equations of the Einstein-Maxwell-dilat...

Abstract We search for a possible relationship between weak gravity conjecture (WGC) and conformal field theory (CFT) in hyperscaling violating Kerr-Newman-AdS black holes. deal with the critical points of hole systems using correlation function introduced CFT discuss WGC conditions imaginary part energy obtained from their poles. Under assumptions , d=1 \theta\rightarrow0^{-}...