scholarly journals Accretion of matter onto black holes in massive gravity with Lorentz symmetry breaking

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
Abdul Jawad ◽  
Kimet Jusufi ◽  
M. Umair Shahzad
Keyword(s):  
Black Holes ◽  
Symmetry Breaking ◽  
Massive Gravity ◽  
Lorentz Symmetry ◽  
Lorentz Symmetry Breaking

scholarly journals Quasinormal modes and van der Waals-like phase transition of charged AdS black holes in Lorentz symmetry breaking massive gravity

2019 ◽  
Vol 28 (09) ◽  
pp. 1950113 ◽  
Author(s):  
Bin Liang ◽  
Shao-Wen Wei ◽  
Yu-Xiao Liu
Keyword(s):  
Phase Transition ◽  
Black Holes ◽  
Black Hole ◽  
Symmetry Breaking ◽  
Quasinormal Modes ◽  
Massive Gravity ◽  
Quasinormal Mode ◽  
Large Black Hole ◽  
Sign Change ◽  
Lorentz Symmetry Breaking

Using the quasinormal modes of a massless scalar perturbation, we investigate the small/large black hole phase transition in the Lorentz symmetry breaking massive gravity. We mainly focus on two issues: (i) the sign change of slope of the quasinormal mode frequencies in the complex-[Formula: see text] diagram; (ii) the behaviors of the imaginary part of the quasinormal mode frequencies along the isobaric or isothermal processes. For the first issue, our result shows that, at low fixed temperature or pressure, the phase transition can be probed by the sign change of slope. While increasing the temperature or pressure to certain values near the critical point, there will appear the deflection point, which indicates that such method may not be appropriate to test the phase transition. In particular, the behavior of the quasinormal mode frequencies for the small and large black holes tend to be the same at the critical point. For the second issue, it is shown that the nonmonotonic behavior is observed only when the small/large black hole phase transition occurs. Therefore, this property can provide us with an additional method to probe the phase transition through the quasinormal modes.

scholarly journals Massive gravity with Lorentz symmetry breaking: Black holes as heat engines

2018 ◽  
Vol 33 (31) ◽  
pp. 1850177 ◽  
Author(s):  
Sharmanthie Fernando
Keyword(s):  
Black Hole ◽  
Symmetry Breaking ◽  
Heat Engine ◽  
Massive Gravity ◽  
Lorentz Symmetry ◽  
Extended Phase ◽  
Heat Engines ◽  
Static Black Hole ◽  
Lorentz Symmetry Breaking ◽  
Two Parameters

In extended phase space, a static black hole in massive gravity is studied as a holographic heat engine. In the massive gravity theory considered, the graviton gains a mass due to Lorentz symmetry breaking. Exact efficiency formula is obtained for a rectangle engine cycle for the black hole considered. The efficiency is computed by varying two parameters in the theory, the scalar charge Q and [Formula: see text]. The efficiency is compared with the Carnot efficiency for the heat engine. It is observed that when Q and [Formula: see text] are increased that the efficiency for the rectangle cycle increases. When compared to the Schwarzschild–AdS black hole, the efficiency for the rectangle cycle is larger for the massive gravity black hole.

scholarly journals Unruh’s detector in the presence of Lorentz symmetry breaking

2007 ◽  
Vol 310 (3-4) ◽  
pp. 333-337 ◽  
Author(s):  
R. Rashidi ◽  
N. Khosravi ◽  
E. Khajeh ◽  
H. Salehi
Keyword(s):  
Symmetry Breaking ◽  
Lorentz Symmetry ◽  
Lorentz Symmetry Breaking
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