Sala 422 12:15 
Seminarium Instytutu

dr Olaf Dreyer (Univ. Sapienza Roma)

The world is discrete

We argue that the scale-free spectrum that is observed in the cosmic microwave background is the result of a phase transition in the early universe.  The observed tilt of the spectrum, which has been measured to be 0.04, is shown to be equal to the anomalous scaling dimension of the correlation function.  The phase transition replaces inflation as the mechanism that produces this spectrum.  The tilt further indicates that there is a fundamental small length scale in nature that we have not yet observed in any other way.