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gr-qc2025
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…
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…