The dynamics of the early universe is influenced by interesting quantum effects like the formation of scalar and tensor perturbations during inflation. I will discuss how such processes can be investigated more closely with quantum simulation. This uses modern quantum technology like ultracold quantum gases in optical traps with time-dependent scattering length. I will also discuss further...
Discovering primordial parity violation would have profound implications for our understanding of early Universe physics and would greatly inform inflationary models. Tantalizing evidence of cosmic parity violation in the four-point statistics of galaxy clustering is currently inconclusive due to uncertainty in observational systematics and covariance estimation. The covariance is challenging...
The tight constraints on the $\mu$ type distortions in the CMB blackbody spectrum coming from the FIRAS observations can be used to set up the bounds on primordial curvature perturbations and thus on the Primordial Black Holes (PBHs). To do so, the conventional works assume the Gaussian initial conditions. However, it is well known that the enhancement in the primordial power spectrum needed...
In this talk, I will discuss the effect of very low cosmic string tensions on the associated stochastic gravitational wave background. I will show that the gravitational wave spectrum is qualitatively different from the one produced by cosmic strings with larger tensions. In fact, it exhibits a very distinct oscillatory feature with dips in the amplitude at multiples of the frequency of the...
