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- Transporting non-Gaussianity from sub- to super- horizon scales

The non-Gaussian statistics of

the primordial density perturbation have become a key test of the inflationary

scenario of the very early universe. Currently many techniques are used to

calculate the non-Gaussian signatures of a given model of inflation. In

particular, simple super-horizon techniques such as the deltaN formalism are

often used for models with more than one field, while more technical field

theory techniques, referred to as the In-In formalism, are typically used for

models where the quantum sub-horizon evolution is important. Recently we have

been developing an alternative point of view, called the transport approach.

This framework highlights the connections between these other techniques and

unifies them. Moreover, since it reduces the problem of calculating the

statistics to that of solving a set of coupled ODEs, numerical implementations

of the system are extremely simple.

Collection/Series:

Event Type:

Seminar

Scientific Area(s):

Speaker(s):

Event Date:

Tuesday, April 30, 2013 - 11:00 to 12:30

Location:

Space Room

©2012 Perimeter Institute for Theoretical Physics