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
- Cosmology, Astrophysics and General Relativity
- DAMTP Friday GR Seminar
- DAMTP info aggregator
- Kavli Institute for Cosmology Talk Lists
- Pavilion B Potter Room (B1.19)
- School of Physical Sciences
Note that ex-directory lists are not shown. |
## Other listsThe Abdus Salam Lecture Ethics Seminar Series Why Deep Neural Networks Are Promising for Speech Recognition## Other talksCambridge - Corporate Finance Theory Symposium September 2017 - Day 1 Rethinking Resilient Healthcare Systems in Contexts of Conflict in Uganda Dynamics and thermodynamics of ligand binding to galectin-3 Nonlinear ICA using temporal structure: a principled framework for unsupervised deep learning 'British Imperial Rule in China during the First Opium War (1840-1842)' Helminth-induced suppression of inflammation – a role for the gut microbiota? |