639 citations · 2.5k across the 51 of their papers we have counts for
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Quantum Reference Frames via Transition Amplitudes in Timeless Quantum Gravity
Jerzy Lewandowski, Chun-Yen Lin
We propose an algorithm of extracting Schrödinger theories under all viable physical time from the Einstein-Hilbert path integral, formulated as the timeless transition amplitudes…
Observational signatures of the parametric amplification of gravitational waves during reheating after inflation
Sachiko Kuroyanagi, Chunshan Lin, Misao Sasaki +1
We study the evolution of Gravitational Waves (GWs) during and after inflation as well as the resulting observational consequences in a Lorentz-violating massive gravity theory wit…
A Class of Minimally Modified Gravity Theories
Chunshan Lin, Shinji Mukohyama
We investigate the Hamiltonian structure of a class of gravitational theories whose actions are linear in the lapse function. We derive the necessary and sufficient condition for a…
Resolving the Ostrogradsky Ghost Problem for a Class of Scalar-tensor Theories
Chunshan Lin
We perform a Hamiltonian analysis and prove that a large class of scalar-tensor theories whose Lagrangian is given by a generic function $F\left(K_{ab},N,R_{ab},h^{ab},\nabla_a,t\r…
CMB Scale Dependent Non-Gaussianity from Massive Gravity during Inflation
Guillem Domènech, Takashi Hiramatsu, Chunshan Lin +3
We consider a cosmological model in which the tensor mode becomes massive during inflation, and study the Cosmic Microwave Background (CMB) temperature and polarization bispectra a…