183 citations · 425 across the 13 of their papers we have counts for
13 papers
Fermionic Isocurvature Perturbations
Daniel J. H. Chung, Hojin Yoo, Peng Zhou
Isocurvature perturbations in the inflationary literature typically involve quantum fluctuations of bosonic field degrees of freedom. In this work, we consider isocurvature perturb…
Quadratic Isocurvature Cross-Correlation, Ward Identity, and Dark Matter
Daniel J. H. Chung, Hojin Yoo, Peng Zhou
Sources of isocurvature perturbations and large non-Gaussianities include field degrees of freedom whose vacuum expectation values are smaller than the expansion rate of inflation.…
Gravity waves and non-Gaussian features from particle production in a sector gravitationally coupled to the inflaton
Neil Barnaby, Jordan Moxon, Ryo Namba +3
We study the possibility that particle production during inflation could source observable gravity waves on scales relevant for Cosmic Microwave Background experiments. A crucial c…
Gravitational Fermion Production in Inflationary Cosmology
Daniel J. H. Chung, Lisa L. Everett, Hojin Yoo +1
We revisit the gravitational production of massive Dirac fermions in inflationary cosmology with a focus on clarifying the analytic computation of the particle number density in bo…
Gravity Waves as a Probe of Hubble Expansion Rate During An Electroweak Scale Phase Transition
Daniel J. H. Chung, Peng Zhou
Just as big bang nucleosynthesis allows us to probe the expansion rate when the temperature of the universe was around 1 MeV, the measurement of gravity waves from electroweak scal…
An integral gated mode single photon detector at telecom wavelengths
Zhengjun Wei, Peng Zhou, Xiaobao Liu +5
We demonstrate an integral gated mode single photon detector at telecom wavelengths. The charge number of an avalanche pulse rather than the peak current is monitored for single-ph…