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204 papers · 1 filter
On measuring the Quantum Universe
David Vasak, Johannes Kirsch, Juergen Struckmeier
We present a theoretical analysis of the WDW approach to quantum cosmology extended to gravity theories with torsion. The dynamics of the FLRW universe is formulated as a classical…
Torsion-Induced Quantum Fluctuations in Metric-Affine Gravity using the Stochastic Variational Method
Tomoi Koide, Armin van de Venn
This review paper comprehensively examines the influence of spatial torsion on quantum fluctuations from the perspectives of Metric-Affine Gravity (MAG) and the Stochastic Variatio…
Critical spacetime crystals in continuous dimensions
Christian Ecker, Florian Ecker, Daniel Grumiller +1
We numerically construct a one-parameter family of critical spacetimes in arbitrary continuous dimensions D>3. This generalizes Choptuik's D=4 solution to spherically symmetric mas…
Dynamical response of twin stars to perturbations
Shamim Haque, Luciano Rezzolla, Ritam Mallick
If a strong first-order phase transition takes place at sufficiently high rest-mass densities in the equation of state (EOS) modelling compact stars, a new branch will appear in th…
General gravitational properties of neutron stars: curvature invariants, binding energy, and trace anomaly
Iván Garibay, Christian Ecker, Luciano Rezzolla
We investigate the behavior of curvature invariants for a large ensemble of neutron stars built with equations of state (EOSs) that satisfy constraints from nuclear theory and pert…
The future ability to test theories of gravity with black-hole shadows
Akhil Uniyal, Indu K. Dihingia, Yosuke Mizuno +1
The horizon-scale images of supermassive black holes (BHs) by the Event Horizon Telescope Collaboration (EHT) have provided new opportunities to test general relativity and other t…