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11 papers · 2 filters
Gravitational wave constraints on Lorentz and parity violations in gravity: high-order spatial derivative cases
Cheng Gong, Tao Zhu, Rui Niu +5
High-order spatial derivatives are of crucial importance for constructing the low energy effective action of a Lorentz or parity violating theory of quantum gravity. One example is…
Gravitational axial perturbations of Schwarzschild-like black holes in dark matter halos
Chao Zhang, Tao Zhu, Anzhong Wang
Gravitational waves emitted by distorted black holes, such as those arising from the coalescence of binary black holes, or a falling compact star into a supermassive black hole, ca…
Constraints on the Nieh-Yan modified teleparallel gravity with gravitational waves
Qiang Wu, Tao Zhu, Rui Niu +2
The discovery of gravitational waves (GWs) from the compact binary components by LIGO/Virgo Collaboration provides an unprecedented opportunity for testing gravity in the strong an…
Extended geometry of Gambini-Olmedo-Pullin polymer black hole and its quasinormal spectrum
Yu-Chen Liu, Jia-Xi Feng, Fu-Wen Shu +1
In this paper we systematically study a model of spherically symmetric polymer black holes recently proposed by Gambini, Olmedo, and Pullin (GOP). Within the framework of loop quan…
Quantum optics meets black hole thermodynamics via conformal quantum mechanics: II. Thermodynamics of acceleration radiation
A. Azizi, H. E. Camblong, A. Chakraborty +2
The thermodynamics of ``horizon brightened acceleration radiation'' (HBAR), due to a random atomic cloud freely falling into a black hole in a Boulware-like vacuum, is shown to mim…
Quantum optics meets black hole thermodynamics via conformal quantum mechanics: I. Master equation for acceleration radiation
A. Azizi, H. E. Camblong, A. Chakraborty +2
A quantum-optics approach is used to study the nature of the acceleration radiation due to a random atomic cloud falling freely into a generalized Schwarzschild black hole through…
Odd-parity stability of black holes in Einstein-Aether gravity
Shinji Tsujikawa, Chao Zhang, Xiang Zhao +1
In Einstein-Aether theory, we study the stability of black holes against odd-parity perturbations on a spherically symmetric and static background. For odd-parity modes, there are…
An Invariant Characterization of the Levi-Civita Spacetimes
C. K. Watson, W. Julius, M. Gorban +3
In the years 1917-1919 Tullio Levi-Civita published a number of papers presenting new solutions to Einstein's equations. This work, while partially translated, remains largely inac…
Spherically symmetric exact vacuum solutions in Einstein-aether theory
Jacob Oost, Shinji Mukohyama, Anzhong Wang
We study spherically symmetric spacetimes in Einstein-aether theory in three different coordinate systems, the isotropic, Painlevè-Gullstrand, and Schwarzschild coordinates, in whi…
Phenomenological implications of modified loop cosmologies: an overview
Bao-Fei Li, Parampreet Singh, Anzhong Wang
In this paper, we first provide a brief review of the effective dynamics of two recently well-studied models of modified loop quantum cosmologies (mLQCs), which arise from differen…
Scalar Curvature Invariants in Classical and Quantum Gravity
B. Shakerin, D. D. McNutt, B. Mattingly +8
A short review of scalar curvature invariants in gravity theories is presented. We introduce how these invariants are constructed and discuss the minimal number of invariants requi…