Dear All,
Raquel Ribeiro - Wednesday 26th October - 4.30pm Maths Room 103
This week's seminar will be given by Raquel Ribeiro from from
Cambridge on "Decoding the bispectrum of single field inflation". The
abstract is below.
The seminar will be in the usual place and start at the usual time of 4.30pm.
Instructions on how to get to the Maths building and a calendar of
future events are available on our wiki at
http://cosrel.maths.qmul.ac.uk .
Best wishes,
Ian
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Dr Ian Huston
Postdoctoral Researcher
Cosmology and Relativity Group
Astronomy Unit, School of Physics and Astronomy
Queen Mary, University of London
[log in to unmask]
http://www.maths.qmul.ac.uk/~ith
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Raquel Ribeiro
Title: Decoding the bispectrum of single-field inflation
Abstract: Non-gaussian statistics of the primordial fluctuations
encode precise information on whichever microphysics operated during
the early Universe. In anticipation of Planck's results, our best hope
is to use observational data to place tight constraints on
inflationary models. In this talk I will review primordial
non-gaussianities arising in single-field inflation. I will argue that
the bispectrum shapes present in different theories are generically
very similar, which can undermine the ability of using shapes to
distinguish between models with different microphysics. However, I
will argue it might still be possible to tell models apart by using a
mode decomposition. I will illustrate this method using the examples
of DBI and k-inflation.
This talk will be based on arXivs 1103.4126 and 1108.3839.
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