4 citations · 7 across the 5 of their papers we have counts for
5 papers
Searching for Anisotropy in the Gravitational Wave Background Using the Parkes Pulsar Timing Array
Yiqin Chen, Shi-Yi Zhao, Zhi-Zhang Peng +17
In recent years, several pulsar timing array collaborations have reported evidence for a nanohertz gravitational wave background (GWB). Such a background signal could be produced b…
Polynomial Potential Inflation in the ACT Era: From CMB to Primordial Black Holes
Zhi-Zhang Peng, Zu-Cheng Chen, Lang Liu
The recent measurements from the Atacama Cosmology Telescope (ACT) favor a higher value of the scalar spectral index compared to the Planck data, challenging many well-establ…
Spectrum of third-order tensor perturbations induced by excited scalar fields
Cheng-Jun Fang, Zhi-Zhang Peng, Han-Wen Hu +1
We calculate for the first time the third-order spectrum of gravitational waves sourced by the amplified scalar field perturbations during inflation using the in-in formalism, and…
Implications for the non-Gaussianity of primordial gravitational waves from pulsar timing arrays
Zhi-Zhang Peng, You Wu, Lang Liu
The detection of a stochastic signal by recent pulsar timing array (PTA) collaborations, including NANOGrav, PPTA, EPTA+InPTA, CPTA and MPTA, has opened a new window to explore gra…
Tensor bispectrum mediated by an excited scalar field during inflation
Zhi-Zhang Peng, Cheng-Jun Fang, Zong-Kuan Guo
We calculate the tensor bispectrum mediated by an excited scalar field during inflation and find that the bispectrum peaks in the squeezed configuration, which is different from th…