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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…
Particle production in a bouncing universe
Mustafa Saeed, Aiman Nauman, Irfan Javed
In massless scalar field cosmology, imposing the universe's physical volume as fundamentally discrete resolves the big bang singularity via a big bounce. We use quantum field theor…
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…