8 papers
Cosmological perturbations and gravitational waves in the general Einstein-vector theory
Xiao-Bin Lai, Yu-Zhi Fan, Yu-Qi Dong +1
We investigate the stability and gravitational waves (GWs) in the four-dimensional general Einstein-vector theory on a cosmological background. To study the stability, we systemati…
Gravitational wave polarization modes and stability analysis in Weyl geometry gravity
Yu-Zhi Fan, Xiao-Bin Lai, Yu-Qi Dong +1
We investigate the gravitational wave polarization modes and stability in Weyl geometry gravity within a Minkowski background. Our results indicate that the tensor sector consists…
Stability Analysis of Cosmological Perturbations in the Bumblebee Model: Parameter Constraints and Gravitational Waves
Xiao-Bin Lai, Yu-Qi Dong, Yu-Zhi Fan +1
We constrain the parameter space of the Bumblebee model in a cosmological background and then investigate the properties of gravitational waves within the constrained parameter spa…
New gravitational wave polarization modes in the torsionless spacetime
Yu-Qi Dong, Xiao-Bin Lai, Yu-Zhi Fan +1
In this study, we investigate the polarization properties of gravitational waves within a torsionless spacetime framework, as described by the Palatini formalism. Our analysis unco…
Polarization modes of gravitational waves in general symmetric teleparallel gravity
Yu-Qi Dong, Xiao-Bin Lai, Yu-Zhi Fan +1
In this paper, we investigate the polarization modes of gravitational waves within the most general symmetric teleparallel gravity theory that allows for second-order field equatio…
Gravitational-wave effects in the most general vector-tensor theory
Yu-Qi Dong, Xiao-Bin Lai, Yu-Qiang Liu +1
In this paper, we establish a model-independent framework based on the Isaacson picture to analyze the gravitational-wave effects in the most general vector-tensor theory that yiel…