117 citations · 970 across the 29 of their papers we have counts for
13 papers · 1 filter
Ultraviolet Completion of the Big Bang in Quadratic Gravity
Ruolin Liu, Jerome Quintin, Niayesh Afshordi
We present a quantum quadratic gravity inflationary scenario that can accommodate the new cosmological constraints, which have disfavored Starobinsky inflation. The theory is asymp…
Cuscuton Bounce Beyond the Linear Regime: Bispectrum and Strong Coupling Constraints
Amir Dehghani, Ghazal Geshnizjani, Jerome Quintin
Cuscuton Gravity is characterized as a scalar field that can be added to general relativity without introducing any new dynamical degrees of freedom on a cosmological background. Y…
Conformal Cores of Quantum Black Holes in Quadratic Gravity
Ruolin Liu, Jerome Quintin, Niayesh Afshordi
We explore the possibility that quadratic gravity, as a renormalizable theory, describes the interior of quantum black holes. We find new exact power-law solutions to pure quadrati…
A small Universe
Jean-Luc Lehners, Jerome Quintin
Many cosmological models assume or imply that the total size of the universe is very large, perhaps even infinite. Here we argue instead that the universe might be comparatively sm…
Uses of Complex Metrics in Cosmology
Caroline Jonas, Jean-Luc Lehners, Jerome Quintin
Complex metrics are a double-edged sword: they allow one to replace singular spacetimes, such as those containing a big bang, with regular metrics, yet they can also describe unphy…
Cosmology at the top of the tower
Jerome Quintin, Heliudson Bernardo, Guilherme Franzmann
The cosmology of the fully -corrected duality-invariant action for the Neveu-Schwarz sector of string theory is revisited, with special emphasis on its coupling to matter sourc…
Cosmological consequences of a principle of finite amplitudes
Caroline Jonas, Jean-Luc Lehners, Jerome Quintin
Over 30 years ago, Barrow & Tipler proposed the principle according to which the action integrated over the entire 4-manifold describing the universe should be finite. Here we expl…
Quantum Circuit Complexity of Primordial Perturbations
Jean-Luc Lehners, Jerome Quintin
We study the quantum circuit complexity of cosmological perturbations in different models of the early universe. A natural measure for the complexity of cosmological perturbations…
Stringy black-hole gas in -corrected dilaton gravity
Jerome Quintin, Robert H. Brandenberger, Maurizio Gasperini +1
We discuss the properties of the gas of primordial `stringy' black holes possibly formed in the high-curvature phase preceding the bouncing transition to the phase of standard cosm…
Cosmological perturbations and stability of nonsingular cosmologies with limiting curvature
Daisuke Yoshida, Jerome Quintin, Masahide Yamaguchi +1
We revisit nonsingular cosmologies in which the limiting curvature hypothesis is realized. We study the cosmological perturbations of the theory and determine the general criteria…
Matter bounce cosmology with a generalized single field: non-Gaussianity and an extended no-go theorem
Yu-Bin Li, Jerome Quintin, Dong-Gang Wang +1
We extend the matter bounce scenario to a more general theory in which the background dynamics and cosmological perturbations are generated by a -essence scalar field with an ar…
Evolution of cosmological perturbations and the production of non-Gaussianities through a nonsingular bounce: Indications for a no-go theorem in single field matter bounce cosmologies
Jerome Quintin, Zeinab Sherkatghanad, Yi-Fu Cai +1
Assuming that curvature perturbations and gravitational waves originally arise from vacuum fluctuations in a matter-dominated phase of contraction, we study the dynamics of the cos…
New model of axion monodromy inflation and its cosmological implications
Yi-Fu Cai, Fang Chen, Elisa G. M. Ferreira +1
We propose a new realization of axion monodromy inflation in which axion monodromy arises from torsional cycles in a type IIB compactification. A class of monomial potentials is ob…