Black holes, initially thought of as very interesting mathematical and geometric solutions of
general relativity, over time, have come up with surprises and challenges for modern …

It is a well-known fact that, in recent times, entanglement harvesting from the quantum field is
being rigorously investigated further in flat and different curved backgrounds. The usually …

Unruh DeWitt (UDW) detectors are important constructs in studying the dynamics of quantum
fields in any geometric background. Curvature also plays an important role in setting up the …

We analyze minimally coupled massless scalar field in a Friedmann (FRW) universe in
conformal co-ordinates to model the evolution of tensor perturbations and study the structure …

We generalize the vacuum-Unruh effect to arbitrary excited states in the Fock space and find
that the Unruh mode at the horizon induces coherent excitation on the canonical …

A bstract We derive the response function for a comoving, pointlike Unruh-DeWitt particle
detector coupled to a complex scalar field ϕ, in the (3+ 1)-dimensional cosmological de …

It is generally believed that, when matter collapses to form a black hole, the complete
information about the initial state of the matter cannot be retrieved by future asymptotic …

The crux of the black hole information paradox is related to the fact that the complete
information about the initial state of a quantum field in a collapsing spacetime is not …

Shock wave gives back reaction to spacetime and the information is stored in the memory of
background. Quantum memory effect of localised shock wave on Minkowski metric is …

In the cosmological settings, Quantum Gravity effects are typically understood to be limited
towards very early phase of the universe, namely in the pre-inflationary era, with limited …