From the 1 of 10 linked papers with an AI index.
10 papers
Stochastic inflation from a non-equilibrium renormalization group
Sebastián Céspedes, Thomas Colas
The paper derives an effective field theory for long-wavelength modes during inflation using a coarse‑grained density matrix, reproducing the Fokker‑Planck equation and computing s…
Primordial non-Gaussianity constraints on dissipative inflation
Santiago Agüà Salcedo, Thomas Colas, Petar Suman +3
Dissipative effects appear in many early-Universe scenarios, yet their universal observational signatures and systematic confrontation with data remain largely unexplored. We emplo…
Phenomenology of an Open Effective Field Theory of Dark Energy
Santiago Agüà Salcedo, Thomas Colas, Lennard Dufner +1
All observational evidence for dark matter and dark energy is so far exclusively gravitational. Hence, the dark sector may be equivalently described by a theory of the spacetime me…
An Open System Approach to Gravity
Santiago Agüà Salcedo, Thomas Colas, Lennard Dufner +1
Several major open problems in cosmology, including the nature of inflation, dark matter, and dark energy, share a common structure: they involve spacetime-filling media with unkno…
Quantum estimation of cosmological parameters
MichaÅ Piotrak, Thomas Colas, Ana Alonso-Serrano +1
Understanding how well future cosmological experiments can reconstruct the mechanism that generated primordial inhomogeneities is key to assessing the extent to which cosmology can…
Open Effective Field Theory and the Physics of Cosmological Collider Signals
Thomas Colas, Zhehan Qin, Xi Tong
We examine the origin of the cosmological collider signal using the framework of open effective field theories. Focusing on the single exchange of a massive scalar field, we demons…