Polarizing Bubble Collisions
Abstract
We predict the polarization of cosmic microwave background (CMB) photons that results from a cosmic bubble collision. The polarization is purely E-mode, symmetric around the axis pointing towards the collision bubble, and has several salient features in its radial dependence that can help distinguish it from a more conventional explanation for unusually cold or hot features in the CMB sky. The anomalous "cold spot" detected by the Wilkinson Microwave Anisotropy Probe (WMAP) satellite is a candidate for a feature produced by such a collision, and the Planck satellite and other proposed surveys will measure the polarization on it in the near future. The detection of such a collision would provide compelling evidence for the string theory landscape.
Cite
@article{arxiv.1006.0832,
title = {Polarizing Bubble Collisions},
author = {Bartlomiej Czech and Matthew Kleban and Klaus Larjo and Thomas S. Levi and Kris Sigurdson},
journal= {arXiv preprint arXiv:1006.0832},
year = {2015}
}
Comments
Published version. 15 pages, 8 figures