COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring. |

University of Cambridge > Talks.cam > DAMTP Friday GR Seminar > Towards the exact de Sitter S-matrix of the Principal Chiral Model

## Towards the exact de Sitter S-matrix of the Principal Chiral ModelAdd to your list(s) Download to your calendar using vCal - Ian Morrison (DAMTP)
- Friday 24 May 2013, 13:00-14:00
- Pavilion B Potter Room (B1.19).
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:- All CMS events
- All Talks (aka the CURE list)
- CMS Events
- Cosmology lists
- DAMTP Friday GR Seminar
- DAMTP info aggregator
- Kavli Institute for Cosmology Talk Lists
- Pavilion B Potter Room (B1.19)
- School of Physical Sciences
- Will Handley's Interests
Note that ex-directory lists are not shown. |
## Other listsCambridge Energy Conference Life Science Interface Seminars Cancer Research UK Cambridge Institute Imaging Seminars## Other talksBuilding a Climate System Laboratory: Modelling the climate system. From Courts, Studios to Bazaars: A Visual History of the Tawa’if in colonial North India, late 18th to early 20th centuries Dr Takashi Ochi,Ttitle to be confirmed Connecting star formation to galactic dynamics Is Just War Theory still relevant in the 21st Century? Prediction, Predestination and the Limits of Perception: Inferno XX, Purgatorio XX, Paradiso XX |