Gravitational collapse into a black hole has been extensively studied with classical sources. We develop new formalism to simulate quantum fields forming hole. This utilizes well-established techniques used for by choosing convenient coherent state, and simulates the matter mechanically. Divergences are regularized cosmological constant Pauli-Villars fields. Using massless spherically symmetric...

We discuss a proposal on how gravitational collapse of NEC (Null Energy Condition) violating spherically symmetric fluid distribution can avoid the formation zero proper volume singularity and eventually lead to Lorentzian wormhole geometry. Our idea is illustrated using time-evolving spacetime in which, we show collapsing sphere may never reach end-state. The nature geodesic congruences such s...

It is fair to say that our current mathematical understanding of the dynamics of gravitational collapse to a black hole is limited to the spherically symmetric situation and, in fact, even in this case much remains to be learned. The reason is that Einstein’s equations become tractable only if they are reduced to a 1 + 1 dimensional system of partial differential equations. Due to this technica...

We derive estimates for the characteristics of gravitational radiation from stellar collapse, using recent models of the core-collapse of Chandrasekhar mass white dwarfs (accretion induced collapse), core-collapse supernovae and collapsars, and the collapse of very massive stars (∼> 300M⊙). We study gravitational-wave emission mechanisms using several estimation techniques, including two-dimens...

We present a new theory for the gravitational-wave signatures of core-collapse supernovae. Previous studies identified axisymmetric rotating core collapse, core bounce, postbounce convection, and anisotropic neutrino emission as the primary processes and phases for the radiation of gravitational waves. Our results, which are based on axisymmetric Newtonian supernova simulations, indicate that t...

The gravitational wave signal arising from the collapsing iron core of a Type II supernova progenitor star carries with it the imprint of the progenitor’s mass, rotation rate, degree of differential rotation, and the bounce depth. Here, we show how to infer the gravitational radiation waveform of a core collapse event from noisy observations in a network of two or more LIGO-like gravitational w...