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10 papers found.
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Holographic insulator/superconductor transition with exponential nonlinear electrodynamics probed by entanglement entropy

From the viewpoint of holography, we study the behaviors of the entanglement entropy in insulator/superconductor transition with exponential nonlinear electrodynamics (ENE). We find that the entanglement entropy is a good probe to the properties of the holographic phase transition. Both in the half space and the belt space, the non-monotonic behavior of the entanglement entropy...

Thermodynamical stability for a perfect fluid

According to the maximum entropy principle, it has been proved that the gravitational field equations could be derived by the extrema of the total entropy for a perfect fluid, which implies that thermodynamic relations contain information as regards gravity. In this manuscript, we obtain a criterion for the thermodynamical stability of an adiabatic, self-gravitating perfect fluid...

Chaos in the motion of a test scalar particle coupling to the Einstein tensor in Schwarzschild–Melvin black hole spacetime

We present firstly the equation of motion for a test scalar particle coupling to the Einstein tensor in the Schwarzschild–Melvin black hole spacetime through the short-wave approximation. Through analyzing Poincaré sections, the power spectrum, the fast Lyapunov exponent indicator and the bifurcation diagram, we investigate the effects of the coupling parameter on the chaotic...

Double shadow of a regular phantom black hole as photons couple to the Weyl tensor

We have studied the shadow of a regular phantom black hole as photons couple to the Weyl tensor. We find that due to the coupling photons with different polarization directions propagate along different paths in the spacetime so that there exists a double shadow for a black hole, which is quite different from that in the non-coupling case where only a single shadow emerges. The...

Chaotic motion of particles in the accelerating and rotating black holes spacetime

We have investigated the motion of timelike particles along geodesic in the background of accelerating and rotating black hole spacetime. We confirm that chaos exists in the geodesic motion of the particles by Poincaré sections, the frequency spectrum and the power spectrum, the fast Lyapunov exponent indicator and the bifurcation diagram. Moreover, we probe the effects of the...

General proof of the entropy principle for self-gravitating fluid in f (R) gravity

The discussions on the connection between gravity and thermodynamics attract much attention recently. We consider a static self-gravitating perfect fluid system in f (R) gravity, which is an important theory could explain the accelerated expansion of the universe. We first show that the Tolman-Oppenheimer-Volkoff equation of f (R) theories can be obtained by thermodynamical...

Ehrenfest scheme for complex thermodynamic systems in full phase space

For a thermodynamic system with multiple pairs of intensive/extensive variables and the thermodynamical coefficients attain finite or infinite values on the phase boundary, we obtain the two classes of Ehrenfest equations in the full phase space, and find that the rank of the matrix for these equations can tell us the dimensions of the phase boundary. We also apply this treatment...

Distinguishing de Sitter universe from thermal Minkowski spacetime by Casimir-Polder-like force

Zehua Tian 0 Jiliang Jing 0 0 Department of Physics, and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University , Changsha, Hunan

Holographic entanglement entropy in insulator/superconductor transition with Born-Infeld electrodynamics

Weiping Yao 0 Jiliang Jing 0 0 Department of Physics, and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University , Changsha

Strong gravitational lensing in a rotating Kaluza-Klein black hole with squashed horizons

Liyong Ji 0 Songbai Chen 0 Jiliang Jing 0 0 Institute of Physics and Department of Physics, Hunan Normal University , Changsha, Hunan 410081, People's Republic of China Key Laboratory of Low