337 citations · 791 across the 21 of their papers we have counts for
21 papers
Primordial features as probes of baryogenesis from supersymmetric flat directions
Yi-Peng Wu, Xingang Chen, Nino Ephremidze +1
The Affleck-Dine mechanism is a leading baryogenesis scenario in which scalar condensates form coherently during inflation along supersymmetric flat directions that are lifted by s…
The cosmological collider in inflation
Yi-Peng Wu
Starobinsky's inflation manifests a best-fit scenario for the power spectrum of primordial density fluctuations. Observables derived from the slow-roll picture of the m…
Induced gravitational waves from the cosmic coincidence
Shyam Balaji, Joseph Silk, Yi-Peng Wu
The induced gravitational wave (GW) background from enhanced primordial scalar perturbations is one of the most promising observational consequences of primordial black hole (PBH)…
The cosmic coincidences of primordial-black-hole dark matter
Yi-Peng Wu, Elena Pinetti, Joseph Silk
If primordial black holes (PBHs) contribute more than 10 percent of the dark matter (DM) density, their energy density today is of the same order as that of the baryons. Such a cos…
Baryogenesis from ultra-slow-roll inflation
Yi-Peng Wu, Elena Pinetti, Kalliopi Petraki +1
The ultra-slow-roll (USR) inflation represents a class of single-field models with sharp deceleration of the rolling dynamics on small scales, leading to a significantly enhanced p…
Constant-rate inflation: primordial black holes from conformal weight transitions
Kin-Wang Ng, Yi-Peng Wu
Constant-rate inflation, including ultra-slow-roll as a special case, has been widely applied to the formation of primordial black holes with significant deviation from the standar…
Stochastic Baryogenesis
Yi-Peng Wu, Kalliopi Petraki
Using a multi-field stochastic approach, we investigate the vacuum expectation value (VEV) during inflation of a scalar field charged under a mildly broken global symmetry t…
Peak statistics for the primordial black hole abundance
Yi-Peng Wu
The primordial black hole (PBH) abundance evaluated by the conventional Press-Schechter (PS) probability distribution is shown to be equivalent to the high-peak limit of a special…
Leptogenesis from spontaneous symmetry breaking during inflation
Yi-Peng Wu, Louis Yang, Alexander Kusenko
Symmetry breaking in the Higgs field via a non-minimal coupling to gravity or higher-dimensional interactions with the inflaton can lead to condensation at a large vacuum expectati…
Higgs as heavy-lifted physics during inflation
Yi-Peng Wu
Signals of heavy particle production during inflation are encoded as non-analytic momentum scaling in primordial non-Gaussianity. These non-analytic signatures can be sourced by St…
Hybrid Quasi-Single Field Inflation
Yi Wang, Yi-Peng Wu, Jun'ichi Yokoyama +1
The decay of massive particles during inflation generates characteristic signals in the squeezed limit of the primordial bispectrum. These signals are in particular distinctive in…
Role of spacetime boundaries in Einstein's other gravity
Naritaka Oshita, Yi-Peng Wu
Einstein's vierbein formulation of general relativity based on the notion of distant parallelism (teleparallelism) naturally introduces a covariant surface term in addition to the…
Loop corrections to primordial fluctuations from inflationary phase transitions
Yi-Peng Wu, Jun'ichi Yokoyama
We investigate loop corrections to the primordial fluctuations in the single-field inflationary paradigm from spectator fields that experience a smooth transition of their vacuum e…
Inflation with teleparallelism: Can torsion generate primordial fluctuations without local Lorentz symmetry?
Yi-Peng Wu
Arbitrary generalization to the teleparallel equivalent of general relativity loses local Lorentz invariance to reparametrize the orthonormal coordinate system and gives rise to as…
Probing gravitational non-minimal coupling with dark energy surveys
Chao-Qiang Geng, Chung-Chi Lee, Yi-Peng Wu
We investigate observational constraints on a specific one-parameter extension to the minimal quintessence model, where the quintessence field acquires a quadratic coupling to the…
Primordial black holes from temporally enhanced curvature perturbation
Teruaki Suyama, Yi-Peng Wu, Jun'ichi Yokoyama
Scalar field with generalized kinetic interactions metamorphoses depending on its field value, ranging from cosmological constant to stiff matter. We show that such a scalar field…
Parametrized Post-Newtonian Limit of Teleparallel Dark Energy Model
Jung-Tsung Li, Yi-Peng Wu, Chao-Qiang Geng
We study the post-Newtonian limit in the teleparallel equivalent of General Relativity with a scalar field which non-minimally couples to gravity. The metric perturbation is obtain…
Density Perturbation Growth in Teleparallel Cosmology
Chao-Qiang Geng, Yi-Peng Wu
We study the cosmological perturbations in teleparallel dark energy models in which there is a dynamical scalar field with a non-minimal coupling to gravity. We find that the propa…
Matter Density Perturbations in Modified Teleparallel Theories
Yi-Peng Wu, Chao-Qiang Geng
We study the matter density perturbations in modified teleparallel gravity theories, where extra degrees of freedom arise from the local Lorentz violation in the tangent space. We…
"Teleparallel" Dark Energy
Chao-Qiang Geng, Chung-Chi Lee, Emmanuel N. Saridakis +1
Using the "teleparallel" equivalent of General Relativity as the gravitational sector, which is based on torsion instead of curvature, we add a canonical scalar field, allowing for…
Primordial Fluctuations within Teleparallelism
Yi-Peng Wu, Chao-Qiang Geng
We study the cosmological perturbations for the possible inflation scenario in the teleparallel equivalence of general relativity specified with parallelizable topological conditio…