Penrose's circles in the CMB and a test of inflation

TL;DR

This paper calculates the expected angular size of circles in the CMB as predicted by Penrose's Conformal Cyclic Cosmology, proposing that detecting these circles could challenge the inflationary model.

Contribution

It provides a theoretical prediction for CMB circles in Penrose's CCC and discusses how their detection or absence could test inflation.

Findings

Calculated the expected angular size of CMB circles in CCC

Proposed that detecting these circles could challenge inflation

Suggests an upper limit on circle size as a test for cosmological models

Abstract

We present a calculation of the angular size of the circles in the CMB predicted by Penrose on the basis of his Conformal Cyclic Cosmology. If these circles are detected, the existence of an upper limit on their angular radius would provide a challenge for inflation.