520 citations · 1.8k across the 29 of their papers we have counts for
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Wormhole Thermodynamics at Apparent Horizons
Mubasher Jamil, M. Akbar
In this paper, we discuss the thermodynamic properties of the evolving Lorentzian wormhole. For the shape function , it is shown that the wormhole spacetime admit…
Thermodynamic Interpretation of Field Equations at Horizon of BTZ Black Hole
M. Akbar
A spacetime horizon comprising with a black hole singularity acts like a boundary of a thermal system associated with the notions of temperature and entropy. In case of static metr…
Thermodynamic Behavior of Friedmann Equation at Apparent Horizon of FRW Universe
M. Akbar, Rong-Gen Cai
It is shown that the differential form of Friedmann equation of a FRW universe can be rewritten as a universal form at apparent horizon, where and are the…
Friedmann Equations of FRW Universe in Scalar-tensor Gravity, f(R) Gravity and First Law of Thermodynamics
M. Akbar, Rong-Gen Cai
In the paper, hep-th/0501055 (R.G. Cai and S.P. Kim, JHEP {\bf 0502}, 050 (2005)), it is shown that by applying the first law of thermodynamics to the apparent horizon of an FRW un…
Schwarzschild-anti de Sitter within an Isothermal Cavity: Thermodynamics, Phase Transitions and the Dirichlet Problem
M. M. Akbar
The thermodynamics of Schwarzschild black holes within an isothermal cavity and the associated Euclidean Dirichlet boundary-value problem are studied for four and higher dimensions…
and Sigma Models in Supergravity: Bianchi type IX Instantons and Cosmologies
M. M. Akbar, P. D. D'Eath
We find instanton/cosmological solutions with biaxial Bianchi-IX symmetry, involving non-trivial spatial dependence of the - and -sigma-models coupled to…
Entropy Corrections for Schwarzschild and Reissner-Nordström Black Holes
M. M. Akbar, Saurya Das
Schwarzschild black hole being thermodynamically unstable, corrections to its entropy due to small thermal fluctuations cannot be computed. However, a thermodynamically stable Schw…
Ricci-flat Metrics with U(1) Action and the Dirichlet Boundary-value Problem in Riemannian Quantum Gravity and Isoperimetric Inequalities
M. M. Akbar, G. W. Gibbons
The Dirichlet boundary-value problem and isoperimetric inequalities for positive definite regular solutions of the vacuum Einstein equations are studied in arbitrary dimensions for…