Anne-Sylvie Deutsch

Influence of super-horizon modes on correlation functions during inflation

Coupling between sub- and super-Hubble modes can affect the locally observed statistics of our universe. In the context of Quasi-Single Field Inflation, we can compute correlation functions and derive the influence of those unobservable modes on observed correlation functions as well as on the inferred cosmological parameters. We study how different classes of diagrams affect the bispectrum in the squeezed limit; in particular, while contact-like diagrams leave the scaling between the long and short modes unchanged, exchange-like diagrams do modify the shape of the bispectrum. We show that the mass of the hidden sector field can hence be biased by an unavoidable cosmic variance that can reach a 1-

Polarized Sunyaev Zel'dovich tomography

\sigma

Reconstruction of the remote dipole and quadrupole fields from the kinetic Sunyaev Zel'dovich and polarized Sunyaev Zel'dovich effects

uncertainty of

Methods for the detection of gravitational waves from sub-solar mass ultracompact binaries

\mathcal{O}(10\%)

Primordial gravitational wave phenomenology with polarized Sunyaev Zel'dovich tomography

for a weakly non-Gaussian universe. Finally, we go beyond the bispectrum and show how couplings between unobservable and observable modes can affect generic correlation functions with arbitrary order non-derivative self-interactions.