359 citations · 4.5k across the 87 of their papers we have counts for
5 papers · 1 filter
Search for Compensated Isocurvature Perturbations with Planck Power Spectra
Julian B. Muñoz, Daniel Grin, Liang Dai +2
In the standard inflationary scenario, primordial perturbations are adiabatic. The amplitudes of most types of isocurvature perturbations are generally constrained by current data…
Antisymmetric galaxy cross-correlations as a cosmological probe
Liang Dai, Marc Kamionkowski, Ely D. Kovetz +2
The auto-correlation between two members of a galaxy population is symmetric under the interchange of the two galaxies being correlated. The cross-correlation between two different…
On Separate Universes
Liang Dai, Enrico Pajer, Fabian Schmidt
(abridged version) The separate universe conjecture states that in General Relativity a density perturbation behaves locally (i.e. on scales much smaller than the wavelength of the…
Detecting the integrated Sachs-Wolfe effect with high-redshift 21-cm surveys
Alvise Raccanelli, Ely Kovetz, Liang Dai +1
We investigate the possibility to detect the integrated Sachs-Wolfe (ISW) effect by cross-correlating 21-cm surveys at high redshifts with galaxies, in a way similar to the usual C…
Conformal Fermi Coordinates
Liang Dai, Enrico Pajer, Fabian Schmidt
Fermi Normal Coordinates (FNC) are a useful frame for isolating the locally observable, physical effects of a long-wavelength spacetime perturbation. Their cosmological application…