|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 listsType the title of a new list here One O'Clock Research Spotlights (Cambridge Migration Research Network - CAMMIGRES) Epigenetics and Stem Cells 2012
Other talksDefining transcription units across the human genome. Buying Private Data without Verification Inequality and social mobility in medieval England Design Practice Prion-mediated control of fungal phenotypes The Leptonic Dirac CP Phase from Residual Symmetry and Muon Decay at Rest Experiment