Semiclassical physics in the gravitational scenario, in its first approximation (first order),
cares only for the expectation value of the stress energy tensor and ignores the inherent …

Stochastic perturbations (radial) of a spherically symmetric relativistic star, modeled by a
perfect fluid in comoving coordinates for the collapse scenario are worked out using the …

A correspondence between fluctuations of non-minimally coupled scalar fields and that of an
effective fluid with heat flux and anisotropic stresses, is shown. Though the correspondence …

Abstract We propose a Classical Einstein–Langevin equation, for certain applications in
Astrophysics and Cosmology. The domain of applications and the formulation are quite …

We develop a simple model for a study of classical fields in the background of a fluctuating
spacetime volume. It is applied for a formulation of the Einstein equations with a perfect-fluid …

A correspondence between fluctuations of minimally coupled scalar fields and that of an
effective perfect fluid is shown to exist. A similar correspondence between the stress tensors …

In this work, we study quantum fluctuations in the stress energy tensor of spinor fields
evolving in general Friedmann-Robertson-Walker (FRW) spacetimes. We quantify these …

The symmetric two point correlation function of the stress–energy tensor, also known as the
noise kernel, for the conformally invariant scalar field is computed in the static region of de …

The central object in the theory of semiclassical stochastic gravity is the noise kernel, which
is the symmetric two point correlation function of the stress–energy tensor. Using the …

We obtain a point-separated noise kernel for the Reissner-Nordström metric. The noise
kernel defines the fluctuations of the quantum stress tensor and is of central importance to …