|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 listsGlobal Food Security at Cambridge Cambridge University Technology and Enterprise Club (CUTEC) Innovation In Emerging Markets
Other talksTranslation machinery in mitochondria – from structure towards clinic Visiting African Fellows' Research Showcase (in association with Hughes Hall) 'Operation ouch': America's response to polio before a vaccine The Main Adrian Lecture. "The flow of information underlying a tactile decision." Can the past help us to understand the present? A life-course perspective on the predictors and consequences of adolescent education and life outcomes in rural India Re-building the diseased retina with stem cells