In Einstein’s gravity, the entropy of horizons is proportional to their area. Several arguments given in the literature suggest that, in this context, both area and entropy should be quantized with an equallyspaced spectrum for large quantum numbers. But in more general theories (like, for example, in the black hole solutions of Gauss-Bonnet or Lanczos-Lovelock gravity) the horizon entropy is n...

The d-dimensional string generated gravity models lead to Einstein-Maxwell equations with quadratic order correction term called the Gauss-Bonnet term. We calculate the quasinormal modes for the d-dimensional charged black hole in the framework of this model. The quasinormal spectrum essentially depends upon the Gauss-Bonnet coupling parameter α which is related to the string scale, and is tota...

Abstract We study the linear instability of charged massless scalar perturbation in regularized 4D Einstein-Gauss-Bonnet-AdS black holes by exploring their quasinormal modes. find that is triggered superradiance. The becomes more unstable with increasing Gauss-Bonnet coupling constant or hole charge. Decreasing AdS radius, on other hand, will make stable. stable region parameter space ( ? , Q ?...

We study the charge of 4D-Einstein-Gauss-Bonnet black hole by a negative and positive particle-antiparticle pair on horizons r- r+, respectively. show that there are two types Schwarzschild hole. also Einstein-Gauss-Bonnet has quantified values. obtain Hawking-Bekenstein formula with logarithmic corrections, second correction depends cosmological constant charge. Finally, we thermodynamics EGB-...

In this paper, we show a no-go theorem for static spherically symmetric black holes with vector hair in Einstein-$\Lambda$-Vector-Tensor-Gauss-Bonnet theory where complex field non-minimally couples Gauss-Bonnet invariant. For purpose, expand metric functions and radial of around the event horizon, substitute expansions into equations motion. Demanding that motion are satisfied each order, vani...

Inflation is a theory in cosmology that explains the early universe experienceda very fast expansion short time and able to explain some cosmological problemsand presence of gravitational waves generated during inflation period. Based on theevent GW170817, it was found c2t = 1, which indicates speed gravitationalwaves nearly equal light. This contradicts several modified theories gravity,one Ei...

BACKGROUND Charles Bonnet Syndrome (CBS) is widely considered a transient condition without adverse consequence, questioning the need for treatment. Yet, while this view may be true of the majority of people with CBS, it is recognised that some have negative experiences and outcomes. Here, we attempt to better understand negative outcome CBS and the factors that influence it. METHODS 4000 mem...

We examine the interaction between massless scalar fields and gravitational field generated by a black hole solution that was recently obtained in consistent well-defined 4-dimensional Einstein-Gauss-Bonnet gravity with cosmological constant. In order to do this, we calculate quasibound state frequencies of for spherically symmetric Einstein-Gauss-Bonnet-de Sitter Anti-de theories. The expressi...

We study two of the most theoretically promising models inflation, namely Natural inflation and Mutated Hilltop in Einstein–Gauss Bonnet (EGB) gravity framework. In this work, we try to explore these keeping observations from GW170817 on speed gravitational wave be equal light. This has direct implications non-minimal coupling Gauss–Bonnet invariant action. Thus, effective potential gets new fe...