"New CMB signatures of the string landscape," by Edgar Shaghoulian (Stanford University)

Tuesday, June 4, 2013 - 4:00pm to 5:00pm
TEP Seminars

TEP Seminar
Tuesday, June 4, 2013
Physics & Astronomy Building (PAB) Room 4-330 

Guest Speaker: Edgar Shaghoulian (Stanford University)

Title: "New CMB signatures of the string landscape"


Our local Hubble volume might be contained within a bubble that nucleated in a false vacuum with only two large spatial dimensions. I will analyze bubble collisions in this scenario and show that they generate gravity waves, which are made possible in this context by the reduced symmetry of the global geometry. These gravity waves would produce B-mode

polarization in the cosmic microwave background, which could in principle dominate over the inflationary background. I will contextualize this work by reviewing past work on observational signatures of the landscape.