383 citations · 3k across the 106 of their papers we have counts for
106 papers
Quantum Clausius relation beyond de Sitter equilibrium
Jinn-Ouk Gong, TaeHun Kim, Junghwan Lee +1
We establish a direct quantum Clausius relation for conformal fields inside the apparent horizon of a quasi-de Sitter spacetime. We compute the net heat flow across the horizon fro…
Reheating as a variational probe of cosmological observables
Jinn-Ouk Gong
We formulate reheating as a constrained variational problem in the space of equation-of-state histories, rather than attempting to describe it through microscopic models. We introd…
Kinetic Isocurvature Perturbation
Kyu Jung Bae, Dhong Yeon Cheong, Jinn-Ouk Gong +2
We formulate a new class of primordial perturbations called , where the mass density of dark matter is constant relative to the photon…
Ultra slow-turn inflation
Ana Achúcarro, Perseas Christodoulidis, Jinn-Ouk Gong +1
In standard multi-field models, tachyonic isocurvature perturbations generally indicate the presence of an instability. We revisit the stability of some known counterexamples and s…
Gravitational open effective field theory of inflation
Perseas Christodoulidis, Jinn-Ouk Gong
We construct a gravitational open extension of the effective field theory of inflation in the Schwinger-Keldysh framework. While physical symmetries allow many open operators in th…
Weakly model-independent determination of total expansion during inflation
Dayeong Choi, Subin Jeon, Jinn-Ouk Gong
We study systematically the total expansion experienced by a certain perturbation mode during single-field inflation, not resorting to explicit models of inflation or reheating. By…