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9 papers · 2 filters
Black Holes in (Quartic) Quasitopological Gravity
M. H. Dehghani, A. Bazrafshan, R. B. Mann +3
We construct quartic quasitopological gravity, a theory of gravity containing terms quartic in the curvature that yields second order differential equations in the spherically symm…
Surface Terms of Quasitopological Gravity and Thermodynamics of Charged Rotating Black Branes
M. H. Dehghani, M. H. Vahidinia
We introduce the surface term for quasitopological gravity in order to make the variational principle of the action well-defined. We also introduce the charged black branes of quas…
Thermodynamics of Rotating Lovelock-Lifshitz Black Branes
M. H. Dehghani, Sh. Asnafi
We investigate the thermodynamics of rotating Lovelock-Lifshitz black branes. We calculate the conserved and thermodynamic quantities of the solutions and obtain a relation between…
Instability of QCD ghost dark energy model
Esmaeil Ebrahimi, Ahmad Sheykhi
We investigate the instability of the ghost dark energy model against perturbations in different cases. To this goal we use the squared sound speed whose sign determines th…
Tachyon Reconstruction of Ghost Dark Energy
A. Sheykhi, M. Sadegh Movahed, E. Ebrahimi
Recently it has been argued that a possible source for the dark energy may arise due to the contribution to the vacuum energy of the QCD ghost in a time-dependent background. In th…
Asymptotically AdS Magnetic Branes in (n+1)-dimensional Dilaton Gravity
M. H. Dehghani, A. Bazrafshan
We present a new class of asymptotically AdS magnetic solutions in ()-dimensional dilaton gravity in the presence of an appropriate combination of three Liouville-type potenti…