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...

A treatment of linearized gravity with Einstein-Gauss-Bonnet interaction terms in D ≥ 5 is given in the Randall-Sundrum brane background. This Letter has outlined some interesting features of the brane world gravity and Newtonian potential correction with GB interaction term. We find that the GB coupling α renormalizes the effective four-dimensional Newton constant on the brane, and also additi...

M. H. Dehghani and S. H. Hendi Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454, Iran Research Institute for Astrophysics and Astronomy of Maragha (RIAAM), Maragha, Iran 3 Physics Department, Yasouj University, Yasouj, Iran Abstract Considering both the Gauss-Bonnet and the Born-Infeld terms, which are on similar footing with regard to string corre...

We present numerical solutions of several spacetimes physical interest, including binary black hole mergers, in shift-symmetric Einstein-scalar-Gauss-Bonnet (ESGB) gravity, and describe our methods for solving the full equations motion, without approximation, general spacetimes. While we concentrate on specific example ESGB, methods, which make use a recently proposed modification to generalize...

We show, using the tunneling method, that Lovelock black holes Hawking radiate with a perfect blackbody spectrum. This is a new result. Within the semiclassical (WKB) approximation the temperature of the spectrum is given by the semiclassical Hawking temperature. Beyond the semiclassical approximation the thermal nature of the spectrum does not change but the temperature undergoes some higher o...

Junction conditions for vacuum solutions in five-dimensional Einstein-Gauss-Bonnet gravity are studied. We focus on those cases where two spherically symmetric regions of space-time are joined in such a way that the induced stress tensor on the junction surface vanishes. So a spherical vacuum shell, containing no matter, arises as a boundary between two regions of the space-time. A general anal...

Owing to the quadratic nature of the theory, Einstein-Gauss-Bonnet gravity generically permits two distinct vacuum solutions. One solution (the ”Einstein” vacuum) has a well defined limit as the Gauss-Bonnet coupling goes to zero, whereas the other solution (the ”stringy” vacuum) does not. There has been some debate regarding the stability of these vacua, most recently from Deser & Tekin who ha...

Abstract We set up an Einstein-Gauss-Bonnet theory in four dimensions, based on the recent formulation of pure gravity with extra dimensions vanishing metrical length [1]. In absence torsion, effective field equations depend only four-metric, reflecting a quadratic curvature nonlinearity but no higher than second order derivatives. contrast proposals to obtain 4dEGB theories through singular re...

Abstract We investigate the regularized four-dimensional Einstein–Gauss–Bonnet (4 D EGB) gravity with a non-minimal scalar coupling function, which is an extension of 4 EGB theory. By introducing to Gauss-Bonnet term, we demonstrate additional contribution dynamical equations otherwise absent in dimensionally Furthermore, analyze stability system by using approach based on fixed points. Then, c...