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17 papers · 1 filter
Black hole shadow and chaos bound violation in teleparallel gravity
Andrea Addazi, Salvatore Capozziello
We show that the so-called chaos bound, proposed by Maldacena, Shenker, and Stanford, can be violated in teleparallel gravity. In particular, it is possible to select a new…
More on gravitational waves from double monodromy inflation
Medeu Abishev, Aigerim Abylayeva, Andrea Addazi +2
We further analyze phenomenological implications of double axion monodromy inflation proposed in Ref. Phys. Rev. D 104, L081302 (2021), in gravitational wave physics. We show that…
Quantum Cosmology in theory
N. Dimakis, A. Paliathanasis, T. Christodoulakis
We use Dirac's method for the quantization of constrained systems in order to quantize a spatially flat Friedmann-Lemaître-Robertson-Walker spacetime in the context of cosmo…
Minimal length, maximal momentum and stochastic gravitational waves spectrum generated from cosmological QCD phase transition
Mohamed Moussa, Homa Shababi, Anisur Rahaman +1
We investigate thoroughly the temporal evolution of the universe temperature as a function of the Hubble parameter associated with the Stochastic Gravitational Wave (SGW), that for…
Photon Ring and Observational Appearance of a Hairy Black Hole
Qingyu Gan, Peng Wang, Houwen Wu +1
Recently, the image of a Schwarzschild black hole with an accretion disk has been revisited, and it showed that the "photon ring", defined as highly bent light rays that intersect…
Stability of horizon with pressure and volume of d-dimensional charged AdS black holes with cloud of strings and quintessence
Rui Yin, Jing Liang, Benrong Mu
In this paper, the thermodynamics and the stability of horizon of the charged AdS black hole surrounded by quintessence and cloud of strings in d-dimensional spacetime are studied…