131 citations · 426 across the 9 of their papers we have counts for
9 papers
Dynamical Tidal Response of Kerr Black Holes from Scattering Amplitudes
M. V. S. Saketh, Zihan Zhou, Mikhail M. Ivanov
We match scattering amplitudes in point particle effective field theory (EFT) and general relativity to extract low frequency dynamical tidal responses of rotating (Kerr) black hol…
Vanishing of black hole tidal Love numbers from scattering amplitudes
Mikhail M. Ivanov, Zihan Zhou
We extract the black hole (BH) static tidal deformability coefficients (Love numbers) and their spin-0 and spin-1 analogs by comparing on-shell amplitudes for fields to scatter off…
Birefringence Tomography for Axion Cloud
Yifan Chen, Chunlong Li, Yosuke Mizuno +5
An axion cloud surrounding a supermassive black hole can be naturally produced through the superradiance process. Its existence can be examined by the axion induced birefringence e…
Revisiting the matching of black hole tidal responses: a systematic study of relativistic and logarithmic corrections
Mikhail M. Ivanov, Zihan Zhou
The worldline effective field theory (EFT) gives a gauge-invariant definition of black hole conservative tidal responses (Love numbers), dissipation numbers, and their spin-0 and s…
Highly non-Gaussian tails and primordial black holes from single-field inflation
Yi-Fu Cai, Xiao-Han Ma, Misao Sasaki +2
For primordial perturbations, deviations from Gaussian statistics on the tail of the probability distribution can be associated with non-perturbative effects of inflation. In this…
One Small Step for an Inflaton, One Giant Leap for Inflation: a novel non-Gaussian tail and primordial black holes
Yi-Fu Cai, Xiao-Han Ma, Misao Sasaki +2
We report a novel prediction from single-field inflation that even a tiny step in the inflaton potential can change our perception of primordial non-Gaussianities of the curvature…
Beating the Lyth bound by parametric resonance during inflation
Yi-Fu Cai, Jie Jiang, Misao Sasaki +2
We propose a novel mechanism for enhancing the primordial gravitational waves without significantly affecting the curvature perturbations produced during inflation. This is achieve…
Primordial black holes and gravitational waves from resonant amplification during inflation
Zihan Zhou, Jie Jiang, Yi-Fu Cai +2
We present a new realization of the resonant production of primordial black holes as well as gravitational waves in a two-stage inflation model consisting of a scalar field ϕwith a…
Probing new physics with multi-vacua quantum tunnelings beyond standard model through gravitational waves
Zihan Zhou, Jun Yan, Andrea Addazi +3
We report on a novel phenomenon of particle cosmology, which features specific cosmological phase transitions via quantum tunnelings through multiple vacua. The latter is inspired…