4 papers
Calibration of CMB Polarisation Using Cross-Experiment Correlations
Claire Rigouzzo, Eugene Lim, Susanna Azzoni +1
Parity-violating physics in the Universe can generate correlations between the Cosmic Microwave Background (CMB) - and -modes, but detecting such signals requires extremely a…
Polarisation Singularities of Gravitational Waves
Claire Rigouzzo, Sebastian Golat, Alex J. Vernon +3
Departure from idealised plane waves gives rise to intricate geometric structures in wave fields. One such structure is the polarisation singularity, which emerges when multiple mo…
Non-linear Dynamics and Primordial Black Hole Formation During Kination
Cheng Cheng, Panagiotis Giannadakis, Lucien Heurtier +1
We investigate the effects of large scalar inhomogeneities during the kination epoch, a period in which the universe's dynamics are dominated by the kinetic energy of a scalar fiel…
A critical value of the inflationary tensor-to-scalar ratio from inhomogeneous inflation
Panagiotis Giannadakis, Matthew Elley, Raphael Flauger +1
We show that, for a given fixed value of the number of e-folds of the homogeneous solution, inflation succeeds with order unity inhomogeneities in the initial conditions above a ch…