|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Towards the exact de Sitter S-matrix of the Principal Chiral Model
If you have a question about this talk, please contact Dr Joan Camps.
In Minkowski space the S-matrix in an invaluable tool for analysing quantum field theories. Scattering matrices may also be constructed and exploited in eternally inflating spacetimes. In the first part of this talk I will review the perturbative construction of the S-matrix in global de Siter space. I will emphasize it’s value as a gauge and field redefinition-invariant probe for QFTs in the inflationary setting. As time allows I will also discuss features of such QFTs which, while obscure from the vantage point of local correlation functions, are transparent when viewed through the S-matrix.
In the second part of my talk I will discuss recent progress towards constructing the exact S-matrix of the Principal Chiral Model (PCM) in de Sitter space. The PCM is a 2-dimensional non-linear sigma model endowed with many of the mature attributes of QCD , including asymptotic freedom and dimensional transmutation. The PCM also contains an infinite number of hidden symmetries which make the theory integrable in Minkowski space. A sufficient number of these symmetries exist also in the de Sitter theory, and thus the de Sitter S-matrix may be determined up to a CDD -type ambiguity.
This talk is part of the DAMTP Friday GR Seminar series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsQuantum Matter Seminar Department of Earth Sciences Seminars (downtown) Peptide Mini-Symposium
Other talksONE DAY MEETING - Biomimicry Lunchtime Talks The Global Transformation Running Out of Energy? The Future of the UK’s Electricity Supply. Do Emotion and Rationality Compete when Making Moral Decisions? The impact of metabolism on NK cell immune functions