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18 papers found.
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The lower bound violation of shear viscosity to entropy ratio due to logarithmic correction in STU model

In this paper, we analyze the effects of thermal fluctuations on a STU black hole. We observe that these thermal fluctuations can affect the stability of a STU black hole. We will also analyze the effects of these thermal fluctuations on the thermodynamics of a STU black hole. Furthermore, in the Jacobson formalism such a modification will produce a deformation of the geometry of ...

Nonlocal teleparallel cosmology

Even though it is not possible to differentiate general relativity from teleparallel gravity using classical experiments, it could be possible to discriminate between them by quantum gravitational effects. These effects have motivated the introduction of nonlocal deformations of general relativity, and similar effects are also expected to occur in teleparallel gravity. Here, we ...

Thermal fluctuations in a hyperscaling-violation background

In this paper, we study the effect of thermal fluctuations on the thermodynamics of a black geometry with hyperscaling violation. These thermal fluctuations in the thermodynamics of this system are produced from quantum corrections of geometry describing this system. We discuss the stability of this system using specific heat and the entire Hessian matrix of the free energy. We ...

Quantum fluctuations from thermal fluctuations in Jacobson formalism

In the Jacobson formalism general relativity is obtained from thermodynamics. This is done by using the Bekenstein–Hawking entropy–area relation. However, as a black hole gets smaller, its temperature will increase. This will cause the thermal fluctuations to also increase, and these will in turn correct the Bekenstein–Hawking entropy–area relation. Furthermore, with the reduction ...

A holographic bound for D3-brane

In this paper, we will regularize the holographic entanglement entropy, holographic complexity and fidelity susceptibility for a configuration of D3-branes. We will also study the regularization of the holographic complexity from the action for a configuration of D3-branes. It will be demonstrated that for a spherical shell of D3-branes the regularized holographic complexity is ...

Non-local deformation of a supersymmetric field theory

In this paper, we will analyze a supersymmetric field theory deformed by generalized uncertainty principle and Lifshitz scaling. It will be observed that this deformed supersymmetric field theory contains non-local fractional derivative terms. In order to construct such a deformed \(\mathcal {N} =1\) supersymmetric theory, a harmonic extension of functions will be used. However, ...

Boundary effects in super-Yang–Mills theory

In this paper, we shall analyze a three dimensional supersymmetry theory with \(\mathcal {N} = 2\) supersymmetry. We will analyze the quantization of this theory, in the presence of a boundary. The effective Lagrangian used in the path integral quantization of this theory, will be given by the sum of the gauge fixing term and the ghost term with the original classical Lagrangian. ...

Compact stars in vector–tensor-Horndeski theory of gravity

In this paper, we will analyze a theory of modified gravity, in which the field content of general relativity will be increased to include a vector field. We will use the Horndeski formalism to non-minimally couple this vector field to the metric. As we will be using the Horndeski formalism, this theory will not contain Ostrogradsky ghost degree of freedom. We will analyze compact ...

Chern–Simons theory in SIM(1) superspace

In this paper, we will analyze a three-dimensional supersymmetric Chern–Simons theory in SIM(1) superspace formalism. The breaking of the Lorentz symmetry down to the SIM(1) symmetry breaks half the supersymmetry of the Lorentz invariant theory. So, the supersymmetry of the Lorentz invariant Chern–Simons theory with \({\mathcal {N}} =1\) supersymmetry will break down to \({\mathcal ...

Higher derivative terms in three dimensional supersymmetric theories

In this work, we systematically analyze higher derivative terms in the supersymmetric effective actions for three dimensional scalar field theories using \( \mathcal{N}=1 \) superspace formalism. In these effective actions, we show that auxiliary fields do not propagate and their effective actions can be expressed in terms of the physical fields. So, the theory does not change its ...

IR finite graviton propagators in de Sitter spacetime

The graviton propagator diverges in certain gauges in de Sitter spacetime. We address this problem in this work by generalizing the infinitesimal BRST transformations in de Sitter spacetime to finite field-dependent BRST (FFBRST) transformations. These FFBRST transformations are a symmetry of the classical action, but they do not leave the path integral measure invariant for the ...

Effects of thermal fluctuations on the thermodynamics of modified Hayward black hole

. Phys . 51 , 3891 ( 2012 ) 39. B.P. Dolan , Class. Quantum Gravity 28 , 235017 ( 2011 ) 40. B. Pourhassan , Mir Faizal, Europhys. Lett. 111 , 40006 ( 2015 ) 41. R. Tharanath , J. Suresh , V.C. Kuriakose

Time crystals from minimum time uncertainty

Motivated by the Generalized Uncertainty Principle, covariance, and a minimum measurable time, we propose a deformation of the Heisenberg algebra and show that this leads to corrections to all quantum mechanical systems. We also demonstrate that such a deformation implies a discrete spectrum for time. In other words, time behaves like a crystal. As an application of our formalism, ...

Supersymmetric duality in superloop space

In this paper we constructed superloop space duality for a four dimensional supersymmetric Yang–Mills theory with \(\mathcal {N} =1\) supersymmetry. This duality reduces to the ordinary loop space duality for the ordinary Yang–Mills theory. It also reduces to the Hodge duality for an abelian gauge theory. Furthermore, the electric charges, which are the sources in the original ...

Branes in Gravity’s Rainbow

In this work, we investigate the thermodynamics of black p-branes (BB) in the context of Gravity’s Rainbow. We investigate this using rainbow functions that have been motivated from loop quantum gravity and \(\kappa \)-Minkowski non-commutative spacetime. Then for the sake of comparison, we examine a couple of other rainbow functions that have also appeared in the literature. We ...

Charged dilatonic black holes in gravity’s rainbow

In this paper, we present charged dilatonic black holes in gravity’s rainbow. We study the geometric and thermodynamic properties of black hole solutions. We also investigate the effects of rainbow functions on different thermodynamic quantities for these charged black holes in dilatonic gravity’s rainbow. Then we demonstrate that the first law of thermodynamics is valid for these ...

Cyclic and heteroclinic flows near general static spherically symmetric black holes

We investigate the Michel-type accretion onto a static spherically symmetric black hole. Using a Hamiltonian dynamical approach, we show that the standard method employed for tackling the accretion problem has masked some properties of the fluid flow. We determine new analytical solutions that are neither transonic nor supersonic as the fluid approaches the horizon(s); rather, they ...

Remnants of black rings from gravity’s rainbow

In this paper, we investigate a spinning black ring and a charged black ring in the context of gravity’s rainbow. By incorporating rainbow functions proposed by AmelinoCamelia, et al. in [1, 2] in the metric of the black rings, a considerable modification happens to their thermodynamical properties. We calculate corrections to the temperature, entropy and heat capacity of the black ...