81 citations · 1.4k across the 54 of their papers we have counts for
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Search for the birefringence of gravitational waves with the third observing run of Advanced LIGO-Virgo
Zhi-Chao Zhao, Zhoujian Cao, Sai Wang
Gravitational waves would attain birefringence during their propagation from distant sources to the Earth, when the CPT symmetry is broken. If it was sizeable enough, such birefrin…
Probing primordial black holes with anisotropies in stochastic gravitational-wave background
Sai Wang, Valeri Vardanyan, Kazunori Kohri
Primordial black holes, if considered to constitute a significant fraction of cold dark matter, trace the inhomogeneous large-scale structure of the Universe. Consequently, the sto…
On the Gauge Invariance of Scalar Induced Gravitational Waves: Gauge Fixings Considered
Zhe Chang, Sai Wang, Qing-Hua Zhu
The energy density spectrum is an observable of gravitational waves. Divergence has appeared in the energy density spectra of the scalar induced gravitational waves for different g…
Gauge Invariant Second Order Gravitational Waves
Zhe Chang, Sai Wang, Qing-Hua Zhu
We investigate the gauge invariance of the second order gravitational waves induced by the first order scalar perturbations by following the Lie derivative method. It is shown expl…
Tests of CPT invariance in gravitational waves with LIGO-Virgo catalog GWTC-1
Sai Wang, Zhi-Chao Zhao
A discovery of gravitational waves from binary black holes raises a possibility that measurements of them can provide strict tests of CPT invariance in gravitational waves. When CP…
Exploring the CPT violation and birefringence of gravitational waves with ground- and space-based gravitational-wave interferometers
Sai Wang
In the gravitational sector, we study the CPT violation and birefringence of gravitational waves. In presence of the CPT violation, a relative dephasing is generated between two ci…