75 citations · 505 across the 34 of their papers we have counts for
15 papers · 1 filter
Optimal all-angle reconstruction of the Hellings-Downs curve
Jing-Hong Han, Zhi-Chao Zhao
Pulsar timing arrays (PTAs) detect nanohertz gravitational waves through spatial correlations between the timing residuals of different pulsars. For an isotropic, unpolarized stoch…
Solving Hamiltonian Constraint Equation with Physics-Informed Neural Networks
Yu-Chen Zhou, Hao Ma, Zhoujian Cao +6
Numerical relativity (NR), solving Einstein equation numerically, plays an important role in source modelling for gravitational wave astronomy. Traditional methods for NR including…
Forecasting graviton-mass constraints from the full covariance of PTA-astrometry ORF estimators
Jing-Hong Han, Zhi-Chao Zhao
We develop a full-covariance formalism for pulsar timing array(PTA) -- astrometry verlap reduction function (ORF) estimators and use it to forecast graviton-mass constraints from a…
Gravitational lensing of gravitational waves: universal characteristics of strongly lensed memory waveforms
Ruanjing Zhang, Zhi-Chao Zhao, Shaoqi Hou +3
In this work, the strong lensing effect of the memory signal was considered. In the geometric optics limit, the lensed memory signal becomes oscillatory, while the unlensed is basi…
Measuring the anisotropies in astrophysical and cosmological gravitational-wave backgrounds with Taiji and LISA networks
Zhi-Chao Zhao, Sai Wang
We investigate the capabilities of space-based gravitational-wave detector networks, specifically Taiji and LISA, to measure the anisotropies in stochastic gravitational-wave backg…
Gravitational wave memory produced by cosmic background radiation
Zhoujian Cao, Xiaokai He, Zhi-Chao Zhao
It is well known that energy fluxes will produce gravitational wave memory. The gravitational wave memory produced by background including cosmic microwave background (CMB), cosmic…
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…
Gravitational wave memory of the binary black hole events in GWTC-2
Zhi-Chao Zhao, Xiaolin Liu, Zhoujian Cao +1
Gravitational wave (GW) memory is an important prediction of general relativity. Existing works on the GW memory detection focus on the waveform analysis. It is hard for waveform a…
Stochastic gravitational wave background due to gravitational wave memory
Zhi-Chao Zhao, Zhoujian Cao
Gravitational wave memory is an important prediction of general relativity, which has not been detected yet. Amounts of memory events can form a stochastic gravitational wave memor…
Detection of the Permanent Strain Offset Component of Gravitational-Wave Memory in Black Hole Mergers
Jeffrey D. Scargle, Zhoujian Cao, Zhi-Chao Zhao
We propose a novel approach to detecting the elusive gravitational-wave memory predicted by general relativity to accompany black hole mergers: direct measurement of the permanent…
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…
The prospects of gravitational waves on constraining the anisotropy of the Universe
Zhi-Chao Zhao, Hai-Nan Lin, Zhe Chang
The observation of GW150914 indicated a new independent measurement of the luminosity distance of a gravitational wave event. In this paper, we constrain the anisotropy of the Univ…
Motion of photons in a background of gravitational wave
Zhe Chang, Chao-Guang Huang, Zhi-Chao Zhao
The photon motion in a Michelson interferometer is re-analyzed in both geometrical optics and wave optics. The classical paths of the photons in the background of gravitational wav…
Is GW151226 a really signal of gravitational wave?
Zhe Chang, Chao-Guang Huang, Zhi-Chao Zhao
Recently, the LIGO Scientific Collaboration and Virgo Collaboration published the second observation on gravitational wave GW151226 [Phys. Rev. Lett. 116, 241103 (2016)] from the b…
Propagation effect of gravitational wave on detector response
Zhe Chang, Chao-Guang Huang, Zhi-Chao Zhao
The response of a detector to gravitational wave is a function of frequency. When the time a photon moving around in the Fabry-Perot cavities is the same order of the period of a g…