191 citations · 1.8k across the 91 of their papers we have counts for
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Anomaly in canonical semiclassical gravity
Viqar Husain, Irfan Javed
We show that the canonical formulation of the semiclassical Einstein equation, where the matter terms in the constraints are replaced by expectation values of the corresponding ope…
Regular black holes and boson stars in semiclassical gravity
Irfan Javed, Viqar Husain
We use a Hamiltonian version of the semiclassical Einstein equation to study classical gravity coupled to a quantum scalar field with potential in spherical symmetry. The system is…
Dynamical model for black hole to white hole transitions
Samantha Hergott, Viqar Husain, Saeed Rastgoo
We present an asymptotically flat spherically symmetric non-singular metric that describes gravitational collapse and matter bounce with transient black hole and white hole regions…
Quantum cosmology as a lattice in a box
Mustafa Saeed, Viqar Husain
We describe quantization schemes for scalar field cosmology in the metric variables with fundamental discreteness imposed with a lattice. The variables chosen for quantization dete…
Entanglement production through a cosmological bounce
Viqar Husain, Irfan Javed, Sanjeev S. Seahra +1
In quantum cosmology, it is expected that the Big Bang singularity is resolved and the universe undergoes a bounce. We find that for Gaussian initial states, matter-gravity entangl…
Shell-crossings and shock formation during gravitational collapse in effective loop quantum gravity
Francesco Fazzini, Viqar Husain, Edward Wilson-Ewing
Effective models of gravitational collapse in loop quantum gravity for the Lemaître-Tolman-Bondi spacetime predict that collapsing matter reaches a maximum finite density, bounces,…