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Open AccessThermodynamics of Taub-NUT-AdS spacetimes
We apply the generalised Komar method proposed in [ar**v:2208.05494] to Taub-NUT-AdS spacetime in the theory of Einstein gravity plus a cosmological constant. Base...
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Article
Open AccessThermodynamics of Taub-NUT and Plebanski solutions
We observe the parallel between the null Killing vector on the horizon and degenerate Killing vectors at both north and south poles in Kerr-Taub-NUT and general Plebanski solutions. This suggests a corresponde...
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Article
Open AccessNear horizon gravitational charges
In this paper, we study the near horizon symmetry and gravitational charges in the Newman-Penrose formalism. In particular we investigate the effect from topological terms. We find that the Pontryagin term and...
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Article
Open AccessA note on Kerr/CFT and Wald entropy discrepancy in high derivative gravities
We examine the Kerr/CFT correspondence in Einstein gravity extended with quadratic curvature invariants. We consider two explicit examples in four and five dimensions and compute the central charges of the asy...
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Article
Open AccessLarge-charge limit of AdS boson stars with mixed boundary conditions
It was recently shown that charged AdS boson stars can reproduce the universal structure of the lowest scaling dimension in the subsector of a CFT with fixed large global U(1) charge Q. Using the model consisting...
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Article
Open AccessHolographic complexity bounds
We study the action growth rate in the Wheeler-DeWitt (WDW) patch for a variety of D ≥ 4 black holes in Einstein gravity that are asymptotic to the anti-de Sitter spacetime, with spherical, toric and hyperbolic h...
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Article
Quasi-topological electromagnetism: Dark energy, dyonic black holes, stable photon spheres and hidden electromagnetic duality
We introduce the quasi-topological electromagnetism which is defined to be the squared norm of the topological 4-form F ∧ F. A salient property is that its energy-momentum tensor is of the isotropic perfect fluid...
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Open AccessAC charge transport in holographic Horndeski gravity
In this paper, we investigate the AC charge transport in the holographic Horndeski gravity and identify a metal-semiconductor like transition that is driven by the Horndeski coupling. Moreover, we fit our nume...
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Article
Open AccessAction growth of dyonic black holes and electromagnetic duality
Electromagnetic duality of Maxwell theory is a symmetry of equations but not of the action. The usual application of the “complexity = action” conjecture would thus lose this duality. It was recently proposed in
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Article
Open AccessHolographic complexity growth rate in Horndeski theory
Based on the context of complexity = action (CA) conjecture, we calculate the holographic complexity of AdS black holes with planar and spherical topologies in Horndeski theory. We find that the rate of change...
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Article
Open AccessQuasi-topological Ricci polynomial gravities
Quasi-topological terms in gravity can be viewed as those that give no contribution to the equations of motion for a special subclass of metric ansätze. They therefore play no rôle in constructing these soluti...
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Article
Open AccessHorndeski gravity and the violation of reverse isoperimetric inequality
We consider Einstein–Horndeski–Maxwell gravity, together with a cosmological constant and multiple Horndeski axions. We construct charged AdS planar black holes in general dimensions where the Horndeski axions...
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Article
Open AccessHolographic heat current as Noether current
We employ the Noether procedure to derive a general formula for the radially conserved heat current in AdS planar black holes with certain transverse and traceless perturbations, for a general class of gravity...
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Article
Open AccessDC conductivities with momentum dissipation in Horndeski theories
In this paper, we consider two four-dimensional Horndeski-type gravity theories with scalar fields that give rise to solutions with momentum dissipation in the dual boundary theories. Firstly, we study Einstei...
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Article
Open AccessDC conductivities from non-relativistic scaling geometries with momentum dissipation
We consider a gravitational theory with two Maxwell fields, a dilatonic scalar and spatially dependent axions. Black brane solutions to this theory are Lifshitz-like and violate hyperscaling. Working with elec...
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Article
Open AccessMagnetically-charged black branes and viscosity/entropy ratios
We consider asymptotically-AdS n-dimensional black brane solutions in a theory of gravity coupled to a set of N p-form field strengths, in which the field strengths carry magnetic charges. For appropriately chose...
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Article
Open AccessBlack hole entropy and viscosity bound in Horndeski gravity
Horndeski gravities are theories of gravity coupled to a scalar field, in which the action contains an additional non-minimal quadratic coupling of the scalar, through its first derivative, to the Einstein ten...
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Article
Open AccessThermodynamics of Lifshitz black holes
We specialize the Wald formalism to derive the thermodynamical first law for static black holes with spherical/torus/hyperbolic symmetries in a variety of supergravities or supergravity-inspired theories invol...
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Article
Open AccessThermodynamics of Einstein-Proca AdS black holes
We study static spherically-symmetric solutions of the Einstein-Proca equations in the presence of a negative cosmological constant. We show that the theory admits solutions describing both black holes and als...
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Article
Open AccessLifshitz and Schrödinger vacua, superstar resolution in gauged maximal supergravities
We consider the subset of gauged maximal supergravities that consists of the SO(n + 1) gauge fields A ij and the scalar deformation T ij of the
