The discussion centers on the implications of the Planck 2013 results for the inflationary paradigm in cosmology, specifically addressing the paper "Inflationary paradigm in trouble after Planck2013" by Anna Ijjas, Paul J. Steinhardt, and Abraham Loeb. The authors argue that the data disfavor all simple inflaton models and highlight three significant problems: a new initial conditions problem, a twist on the multiverse problem, and an inflationary unlikeliness problem. The conversation reflects skepticism about the validity of these claims and suggests that alternative models may still exist that could evade the constraints imposed by the Planck data.
PREREQUISITESCosmologists, theoretical physicists, and researchers interested in the foundations of cosmological models and the implications of observational data on established theories.
Yes, this is correct. A rather high tensor amplitude is at the very limit of detectability of the instrument, but the simulations which say that don't take into account realistic systematic errors or the problems of component separation. So a detection of the B modes would be exceptional indeed.skydivephil said:From people that I have spoken to that work on PLanck they don't expect to see the B mode because its not designed to detect it. They hope they will get lucky but no one is betting on it.
Chronos said:Two CMB b mode polarization experiments are currently underway - EBEX and POLARBEAR.