4 papers
Cosmological Cutting Rules from Flat-Space Unitarity via Dressing
Arhum Ansari, Sachin Jain, Deep Mazumdar
Using cosmological dressing rules, we uplift flat-space unitarity cuts to discontinuity relations for dS/EAdS observables. In this representation, Cutkosky delta functions map dire…
Time Non-locality in Dark Matter and LSS
Arhum Ansari, Arka Banerjee, Sachin Jain +1
We explore the intriguing phenomenon of time non-locality in the evolution of dark matter and Large Scale Structure (LSS). Recently in\,\cite{Donath:2023sav}, it was shown that tim…
Bootstrapping LSS perturbation theory beyond third order
Arhum Ansari, Arka Banerjee, Sachin Jain +1
Bootstrap techniques relying on the constraints imposed by Extended Galilean Invariance (EGI), have proved to be very useful in the context of perturbation theory of the Large Scal…
Inflationary non-Gaussianities in alpha vacua and consistency with conformal symmetries
Arhum Ansari, Pinak Banerjee, Prateksh Dhivakar +2
We study the conformal invariance of inflationary non-Gaussianities associated with scalar fluctuations in a non-Bunch-Davies initial state, known as the -vacuum, in single-fie…