Moment transport equations for non-Gaussianity

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• David Mulryne, Imperial College
• Friday 03 December 2010, 13:00-14:00
• Pavilion B Potter Room (B1.19).

If you have a question about this talk, please contact Dr Sebastien Renaux-Petel.

I will discuss a novel method for calculating the primordial non-Gaussianity produced by super-horizon evolution during inflation. The method involves the use of a transport equation to evolve statistical distributions from horizon crossing until the end of inflation. Using this method, simple evolution equations for the moments of the distribution of the curvature perturbation $\zeta$, such as the variance and skewness, can be derived. This method possesses some advantages over existing techniques. Among them, it can cleanly separate multiple sources of primordial non-Gaussianity, and leads to a clean numerical implementation. I will argue there is a strong need for numerical methods in multiple field models and show the results of some preliminary simulations.

This talk is part of the DAMTP Friday GR Seminar series.

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