We examine gyration motion of a charged particle viewed from a reference observer falling along Z axis into Schwarzschild black hole. The magnetic field is assumed to be constant and uniform along Z axis. The motion far from the gravitational source is circular in X-Y plane. Fate of the circular orbit is calculated as the reference observer approaches the black hole. The circular orbit is event...

We present the results of three-dimensional global resistive magnetohydrodynamic (MHD) simulations of black hole accretion flows. General relativistic effects are simulated by using the pseudo-Newtonian potential. Initial state is an equilibrium model of a torus threaded by weak toroidal magnetic fields. As the magnetorotational instability (MRI) grows in the torus, mass accretes to the black h...

A bstract We consider entanglement entropies of finite spatial intervals in Minkowski radiation baths coupled to the eternal black hole JT gravity, and related problem involving free fermion BCFT thermofield double state. show that non-monotonic entropy evolution precisely matches theory a high temperature limit, results have form expected for CFTs with quasiparticle description. Both exhibit r...