Posted: Mar 21, 2014 7:56 am
by twistor59
Calilasseia wrote:
Er, according to the two papers by Steinhardt & Turok I presented in multiple places here, observations of gravity waves are actually a crucial test in a different manner. According to those papers, what matters is the spectrum of observed gravity waves. My understanding from those papers, is that if gravity waves were never detected, this would be a far bigger blow to the ekpyrotic model. The detection of gravity waves, according to those papers, is actually necessary in order to test the theory.


Unfortunately it's not just the existence of primordial gravitational radiation, but the statistical properties of this radiation predicted by the ekpyrotic models which would appear to have been invalidated, as Motl explains:

http://motls.blogspot.co.uk/2014/03/bicep2-some-winners-and-losers.html