Search Publications
Limits on entanglement effects in the string landscape from Planck and BICEP/Keck data
Kinney, William H.
We consider observational limits on a proposed model of the string landscape in inflation. In this scenario, effects from the decoherence of entangled quantum states in long-wavelength modes in the universe result in modifications to the Friedmann Equation and a corresponding modification to inflationary dynamics. Previous work [1, 2] suggested th…
Mixed inflaton and spectator field models: CMB constraints and µ distortion
Takahashi, Tomo; Sekiguchi, Toyokazu; Enqvist, Kari
We discuss mixed inflaton and spectator field models where both the fields are responsible for the observed density fluctuations. We combine the angular power spectrum of the CMB temperature anisotropy from the Planck 2013 result and other ground-based CMB observations in order to constrain both the general mixed model as well as some specific rep…
Isotropy-violation diagnostics for B-mode polarization foregrounds to the Cosmic Microwave Background
Huffenberger, Kevin; Rotti, Aditya
Isotropy-violation statistics can highlight polarized galactic foregrounds that contaminate primordial B-modes in the Cosmic Microwave Background (CMB). We propose a particular isotropy-violation test and apply it to polarized Planck 353 GHz data, constructing a map that indicates B-mode foreground dust power over the sky. We build our main isotro…
Consistency relation and non-Gaussianity in a Galileon inflation
Asadi, Kosar; Nozari, Kourosh
We study a particular Galileon inflation in the light of Planck2015 observational data in order to constraint the model parameter space. We study the spectrum of the primordial modes of the density perturbations by expanding the action up to the second order in perturbations. Then we pursue by expanding the action up to the third order and find th…
The comptonization parameter from simulations of single-frequency, single-dish, dual-beam, cm-wave observations of galaxy clusters and mitigating CMB confusion using the Planck sky survey
Lew, Bartosz; Roukema, Boudewijn F.
Systematic effects in dual-beam, differential, radio observations of extended objects are discussed in the context of the One Centimeter Receiver Array (OCRA). We use simulated samples of Sunyaev-Zel'dovich (SZ) galaxy clusters at low (z < 0.4) and intermediate (0.4 < z < 1.0) redshifts to study the implications of operating at a single f…