459 citations · 3.9k across the 157 of their papers we have counts for
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Some Lower Dimensional Quantum Field Theories Reduced from Chern-Simons Gauge Theories
Burak Oğuz, Bayram Tekin
We study symmetry reductions in the context of Euclidean Chern-Simons gauge theories to obtain lower dimensional field theories. Symmetry reduction in certain gauge theories is a c…
Some Lower Dimensional Quantum Field Theories Reduced from Chern-Simons Gauge Theories
Burak Oğuz, Bayram Tekin
We study symmetry reductions in the context of Euclidean Chern-Simons gauge theories to obtain lower dimensional field theories. Symmetry reduction in certain gauge theories is a c…
Partition Function of a Volume of Space in a Higher Curvature Theory
Aydin Tavlayan, Bayram Tekin
Recently, [Phys. Rev. Lett. 130, 221501 (2023)] Jacobson and Visser calculated the quantum partition function of a fixed, finite volume of a region with the topology of a ball in t…
Gauge Invariant Derivation of Zeroth and First Laws of Black Hole Thermodynamics
K. Hajian, M. M. Sheikh-Jabbari, B. Tekin
In gauge invariant theories, like Einstein-Maxwell theory, physical observables should be gauge invariant. In particular, mass, entropy, angular momentum, electric charge and their…
Hyperbolic Metamaterials and Massive Klein-Gordon Equation in 2+1 Dimensional de Sitter Spacetime
Bayram Tekin
The wave equation obeyed by the extraordinary component of the electric field in a hyperbolic metamaterial was shown to be a massless Klein-Gordon field living in a flat spacetime…
Einstein-Yang-Mills Theory: Gauge Invariant Charges and Linearization Instability
Emel Altas, Ercan Kilicarslan, Bayram Tekin
We construct the gauge-invariant electric and magnetic charges in Yang-Mills theory coupled to cosmological General Relativity (or any other geometric gravity), extending the flat…
Event Horizon Detecting Invariants
Aydin Tavlayan, Bayram Tekin
Some judiciously chosen local curvature scalars can be used to invariantly characterize event horizons of black holes in dimensions, but they fail for the three dimensional…
Non-Einsteinian Black Holes in Generic 3D Gravity Theories
Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin
The Bañados-Teitelboim-Zanelli (BTZ) black hole metric solves the three-dimensional Einstein's theory with a negative cosmological constant as well as all the generic higher deriva…
Exotic Massive Gravity: Causality and a Birkhoff-like Theorem
Ercan Kilicarslan, Bayram Tekin
We study the local causality issue via the Shapiro time-delay computations in the on-shell consistent exotic massive gravity in three dimensions. The theory shows time-delay as opp…
Second Order Perturbation Theory in General Relativity: Taub Charges as Integral Constraints
Emel Altas, Bayram Tekin
In a nonlinear theory, such as General Relativity, linearized field equations around an exact solution are necessary but not sufficient conditions for linearized solutions. Therefo…
Bachian Gravity in Three Dimensions
Gokhan Alkac, Mustafa Tek, Bayram Tekin
In three dimensions, there exist modifications of Einstein's gravity akin to the topologically massive gravity that describe massive gravitons about maximally symmetric backgrounds…
New approach to conserved charges of generic gravity in AdS
Emel Altas, Bayram Tekin
Starting from a divergence-free rank-4 tensor of which the trace is the cosmological Einstein tensor, we give a construction of conserved charges in Einstein's gravity and its high…
Conserved charges in AdS: A new formula
Emel Altas, Bayram Tekin
We give a new construction of conserved charges in asymptotically anti-de Sitter spacetimes in Einstein's gravity. The new formula is explicitly gauge-invariant and makes direct us…
Holographic c-theorem and Born-Infeld Gravity Theories
Gokhan Alkac, Bayram Tekin
The requirement of the existence of a holographic c-function for higher derivative theories is a very restrictive one and hence most theories do not possess this property. Here, we…
Linearization Instability of Chiral Gravity
Emel Altas, Bayram Tekin
Carrying out an analysis of the constraints and their linearizations on a spacelike hypersurface, we show that topologically massive gravity has a linearization instability at the…
Conserved Charges in Extended Theories of Gravity
Hamed Adami, Mohammad Reza Setare, Tahsin Cagri Sisman +1
We give a detailed review of construction of conserved quantities in extended theories of gravity for asymptotically maximally symmetric spacetimes and carry out explicit computati…
Entropy in Born-Infeld Gravity
Gokcen Deniz Ozen, Sahin Kurekci, Bayram Tekin
There is a class of higher derivative gravity theories that are in some sense natural extensions of cosmological Einstein's gravity with a unique maximally symmetric classical vacu…
Linearization Instability for Generic Gravity in AdS
Emel Altas, Bayram Tekin
In general relativity, perturbation theory about a background solution fails if the background spacetime has a Killing symmetry and a compact spacelike Cauchy surface. This failure…
Unitarity Problems in 3 Gravity Theories
Gokhan Alkac, Luca Basanisi, Ercan Kilicarslan +1
We revisit the problem of the bulk-boundary unitarity clash in 2 + 1 dimensional gravity theories, which has been an obstacle in providing a viable dual two-dimensional conformal f…
Particle Content of Quadratic and Theories in
Bayram Tekin
We perform a complete decoupling of the degrees of freedom of quadratic gravity and the generic theory about any one of their possible vacua, i.e. maximally symmetri…
Causality in 3D Massive Gravity Theories
Jose D. Edelstein, Gaston Giribet, Carolina Gomez +3
We study the constraints coming from local causality requirement in various dimensional dynamical theories of gravity. In topologically massive gravity, with a single parity…
Minimal Extension of Einstein's Theory: The Quartic Gravity
Atalay Karasu, Esin Kenar, Bayram Tekin
We study structure of solutions of the recently constructed minimal extensions of Einstein's gravity in four dimensions at the quartic curvature level. The extended higher derivati…
Asymptotically flat black holes in 2+1 dimensions
Gokhan Alkac, Ercan Kilicarslan, Bayram Tekin
Asymptotically flat black holes in dimensions are a rarity. We study the recently found black flower solutions (asymptotically flat black holes with deformed horizons), stati…
Holographically Viable Extensions of Topologically Massive and Minimal Massive Gravity?
Emel Altas, Bayram Tekin
Recently, an extension of the topologically massive gravity (TMG) in dimensions, dubbed as minimal massive gravity (MMG), was found which is free of the bulk-boundary unitari…