We review constructions of three-dimensional 'quantum'black holes. Such spacetimes arise
via holographic braneworlds and are exact solutions to an induced higher-derivative theory …

We review thermodynamic properties of modified gravity theories, such as F (R) gravity and f
(T) gravity, where R is the scalar curvature and T is the torsion scalar in teleparallelism. In …

We prove that, in general, the first law of black hole thermodynamics, δQ= TδS, is violated in
f (T) gravity. As a result, it is possible that there exists entropy production, which implies that …

A bstract A new principle in quantum gravity, dubbed spacetime complexity, states that
gravitational physics emerges from spacetime seeking to optimize the computational cost of …

Gravitational wave physics can probe theories that extend beyond general relativity.
Motivated by recent attention on the Kalb-Ramond field as a dark matter candidate, in this …

Abstract When the Bekenstein–Hawking entropy is modified, ambiguity often arises
concerning whether the Hawking temperature or the thermodynamic mass should be …

We show that the linearized higher derivative gravitational field equations are equivalent to
an equilibrium condition on the entanglement entropy of small spherical regions in vacuum …

We investigate thermodynamics of the apparent horizon inf (R) gravity in the Palatini
formalism with non-equilibrium and equilibrium descriptions. We demonstrate that it is more …

The vacuum of quantum fields contains correlated fluctuations. When restricted to one side
of a surface these have a huge entropy of entanglement that scales with the surface area. If …

A bstract It has recently been shown that in single field slow-roll inflation the total volume
cannot grow by a factor larger than\({e^{{S_ {dS}}/2}}\) without becoming infinite. The bound …