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Article
WIMPs in Dilatonic Einstein Gauss–Bonnet Cosmology
We study the thermal decoupling of weakly interacting massive particles (WIMPs) in a dilatonic Einstein Gauss–Bonnet (dEGB) cosmological scenario where standard gravity is modified by a Gauss–Bonnet term non-m...
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Article
Open AccessViolation of bound on chaos for charged probe in Kerr-Newman-AdS black hole
We investigate the conjectured bound on the Lyapunov exponent for a charged particle with angular motion in the Kerr-Newman-AdS black hole. The Lyapunov exponent is calculated based on the effective Lagrangian...
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Article
Open AccessInvestigations of strong cosmic censorship in 3-dimensional black strings
Investigating the quasinormal modes of a massive scalar field on the 3-dimensional black string (3dBS), we study the strong cosmic censorship (SCC) conjecture for the 3dBS in the T-dual relationship with the 3...
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Article
Open AccessGeneralized holographic cosmology: low-redshift observational constraint
Four-dimensional cosmological models are studied on a boundary of a five-dimensional Anti-de Sitter (AdS5) black hole with AdS Reissner-Nordström and scalar charged Reissner-Nordström black hole solutions, where ...
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Article
Open AccessRindler fluid with weak momentum relaxation
We realize the weak momentum relaxation in Rindler fluid, which lives on the time-like cutoff surface in an accelerating frame of flat spacetime. The translational invariance is broken by massless scalar field...
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Article
Open AccessTunneling decay of false vortices with gravitation
We study the effect of vortices on the tunneling decay of a symmetry-breaking false vacuum in three spacetime dimensions with gravity. The scenario considered is one in which the initial state, rather than bei...
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Article
Open AccessAnisotropic dyonic black brane and its effects on holographic conductivity
We investigate a massive gravity theory involving the SL(2, R) symmetry and anisotropy. Due to the SL(2, R) invariance of the equations of motion, the complex con-ductivity of this model transforms covariantly un...
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Article
Observational constraints on inflation with the nonlinear sigma-fields in light of Planck 2015
We study an inflation model with a nonlinear sigma field which has SO(3) symmetry. The background solution of the nonlinear sigma field is linearly proportional to the space coordinates while kee** the homogene...
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Article
Open AccessMatrix models from localization of five-dimensional supersymmetric noncommutative U(1) gauge theory
We study localization of five-dimensional supersymmetric U(1) gauge theory on ...
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Article
Holographic trace anomaly at finite temperature
Using the holographic renormalization, we investigate the finite temperature and size effect to the energy-momentum tensor of the dual field theory and its renormalization group (RG) flow. Following the anti-d...
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Article
Open AccessThe upper bound of radiation energy in the Myers-Perry black hole collision
We have investigated the upper bound of the radiation energy in the head-on collision of two Myers-Perry black holes. Initially, the two black holes are far away from each other, and they become one black hole...
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Article
Chaos in Lifshitz spacetimes
We investigate the chaotic behavior of a circular test string in the Lifshitz spacetimes by considering the critical exponent z as an external control parameter. We demonstrate that two primary tools to observe c...
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Article
Open AccessInstability of Black Holes with a Gauss–Bonnet Term
We investigate the fragmentation instability of hairy black holes in the theory with a Gauss–Bonnet (GB) term in asymptotically flat spacetime. Our approach is through the non-perturbative fragmentation instab...
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Article
Open AccessProperties of holographic mesons on dense medium
We study the energy dispersions of holographic light mesons and their decay constants on dense nuclear medium. As the spatial momenta of mesons along the boundary direction increase, both observables of the me...
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Article
Open AccessTime evolution of entanglement entropy in quenched holographic superconductors
We investigate the dynamical evolution of entanglement entropy in a holographic superconductor model by quenching the source term of the dual charged scalar operator. By access to the full background geometry,...
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Article
Open AccessGravitational waves from cosmic bubble collisions
Cosmic bubbles are nucleated through the quantum tunneling process. After nucleation they would expand and undergo collisions with each other. In this paper, we focus in particular on collisions of two equal-s...
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Article
Open AccessDynamical condensation in a holographic superconductor model with anisotropy
We study dynamical condensation process in a holographic superconductor model with anisotropy. The time-dependent numerical solution is constructed for the Einstein-Maxwell-dilaton theory with complex scalar i...
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Article
Generalized Fubini instantons of a self-gravitating scalar field
We investigate the various types of Fubini instantons in the presence of gravity. The Fubini instanton describes the decay of a vacuum state as a consequence of tunneling from the top of a potential to an arbi...
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Article
Holographic meson mass splitting in the nuclear matter
We study the holographic light meson spectra and their mass splitting in the nuclear medium. In order to describe the nuclear matter, we take into account the thermal charged AdS geometry with two flavor charg...
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Article
Fubini instantons in curved space
We study Fubini instantons of a self-gravitating scalar field. The Fubini instanton describes the decay of a vacuum state under tunneling instead of rolling in the presence of a tachyonic potential. The tunnel...
