3 papers
gr-qc2025
Particle production in a bouncing universe
Mustafa Saeed, Irfan Javed, Aiman Nauman
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…
gr-qc2025
Phase transitions due to Euclidean gravity
Mustafa Saeed, Diya Batool, Muhammad Muzammil +1
We use Ising-like models to probe the thermal nature of Euclidean spacetime backgrounds. We determine which properties of the background -- curvature, the presence of a horizon, or…
gr-qc2024
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…