97 citations · 1.3k across the 32 of their papers we have counts for
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Exploring the full parameter space for an interacting dark energy model with recent observations including redshift-space distortions: Application of the parametrized post-Friedmann approach
Yun-He Li, Jing-Fei Zhang, Xin Zhang
Dark energy can modify the dynamics of dark matter if there exists a direct interaction between them. Thus a measurement of the structure growth, e.g., redshift-space distortions (…
Measuring growth index in a universe with sterile neutrinos
Jing-Fei Zhang, Yun-He Li, Xin Zhang
Consistency tests for the general relativity (GR) can be performed by constraining the growth index using the measurements of redshift-space distortions (RSD) in conjunction wi…
Tilt of primordial gravitational wave spectrum in a universe with sterile neutrinos
Yun-He Li, Jing-Fei Zhang, Xin Zhang
In this work, we constrain the spectral index of the primordial gravitational wave power spectrum in a universe with sterile neutrinos by using the Planck temperature data, t…
Parametrized Post-Friedmann Framework for Interacting Dark Energy
Yun-He Li, Jing-Fei Zhang, Xin Zhang
Dark energy might directly interact with cold dark matter. However, in such a scenario, an early-time large-scale instability occurs occasionally, which may be due to the incorrect…
Cosmological constraints on neutrinos after BICEP2
Jing-Fei Zhang, Yun-He Li, Xin Zhang
Since the B-mode polarization of the cosmic microwave background (CMB) was detected by the BICEP2 experiment and an unexpectedly large tensor-to-scalar ratio, $r=0.20^{+0.07}_{-0.0…
Sterile neutrinos help reconcile the observational results of primordial gravitational waves from Planck and BICEP2
Jing-Fei Zhang, Yun-He Li, Xin Zhang
We show that involving a sterile neutrino species in the CDM+ model can help relieve the tension about the tensor-to-scalar ratio between the Planck temperature data and…