Conveners
T3-9 Cosmology (DTP) | Cosmologie (DPT)
- Ghazal Geshnizjani (University of Waterloo; Perimeter Institute)
CHIME will use Intensity Mapping of the 21cm line of neutral hydrogen to map
large-scale structure between redshifts of 0.8 and 2.5. By measuring Baryon
Acoustic Oscillations (BAO) we will place constraints on the dark energy
equation of state as it begins to dominate the expansion of the Universe,
particularly at redshifts poorly probed by current BAO surveys.
In this talk I will introduce...
Data analysis of the cosmic microwave background is often performed by making a map of the sky and then converting that map into its spherical harmonics. This is done because the expectation is that the spherical harmonic coefficients are Gaussian random variables, and the data agrees with this prediction extremely well. In this talk I will discuss a less often used map space approach. The...
I will discuss the current status and future prospects of searching for cosmic microwave background signatures of cosmic birefringence, primordial magnetic fields and cosmic strings, and implications for fundamental physics.
We argue that the presence of an inflationary epoch is a natural, almost unavoidable, consequence of the existence of a sensible effective action involving an infinite tower of higher-curvature corrections to the Einstein-Hilbert action. No additional fields besides the metric are required. We show that a family of such corrections giving rise to a well-posed cosmological evolution exists and...
In this talk I will introduce a new real-time description of vacuum decay in quantum field theories. Vacuum decay via bubble formation is simulated by generating realizations of vacuum fluctuations and evolving lattice simulations with the classical equations of motion. The decay rate obtained from an ensemble of simulations is in excellent agreement with existing semi-classical techniques. I...
