14 papers
Gravitational wave propagation in HoÅava-Lifshitz gravity
A. A. Araújo Filho, J. L. A. Silva, N. Heidari +3
We investigate the generation and propagation of gravitational waves in the leading parity-even infrared truncation of HoÅava-Lifshitz gravity, characterized by the modified tenso…
Reference Frames and Gravitational-Wave Polarizations: Symmetry Classification and Preferred-Frame Phenomenology
Jie Zhu, Hao Li
Gravitational wave (GW) polarizations are traditionally classified in a fixed frame ( classification), which does not account for how polarization patterns change under Loren…
Revisit Static Aether: Exact Vacuum Solution in Einstein-Aether Theory and Its Analytic Extension
Jie Zhu, Hao Li
We obtain an exact analytical vacuum solution of Einstein-Aether theory with a strictly static aether configuration and investigate its maximal extension. The solution depends only…
Dynamic Aspects of Bumblebee Gravity: Post-Newtonian Approach
Jie Zhu, Hao Li
In this work, we investigate the dynamic aspects of Bumblebee gravity via the parameterized post-Newtonian method. We find that the PPN framework is self-consistent up to 1.5PN ord…
On the Consistency of Covariant Light-Speed Variation in Doubly Special Relativity
Hao Li, Jie Zhu
Doubly special relativity (DSR) introduces an observer-independent energy scale while preserving a deformed relativistic notion of covariance. In many realizations, this leads to a…
Parameterized Post-Newtonian Analysis of Quadratic Gravity and Solar System Constraints
Jie Zhu, Hao Li
This work systematically investigates the post-Newtonian behavior of general quadratic gravity in the weak-field regime. By extending the Einstein-Hilbert action to include quadrat…