Week 21.10.2017 – 29.10.2017


Chiral Algebras for four dimensional N=4 SCFT

Regular Seminar Carlo Meneghelli (Oxford)

13:15 KCL
room K4.31

Any four dimensional N=2 superconformal field theory (SCFT) contains a subsector of local operator which is isomorphic to a two dimensional chiral algebra. If the 4d theory possesses N=3 or N= 4 superconformal symmetry, the corresponding chiral algebra is an extension the N=2 or (small) N=4 super-Virasoro algebra respectively. In this talk I will present some results on the classification of N=4 chiral algebras and discuss if they can correspond to a 4d theory.


Gravity as the square of Yang-Mills: Amplitudes, Symmetries, Equations of Motion

Regular Seminar Alexandros Anastasiou (Nordita)

14:00 QMW
room G.O. Jones 610

Squaring involves the tensoring between the state content of two super Yang-Mills (YM) theories to obtain the state content of a supergravity theory. In the first part of this talk I will discuss how understanding the YM origin of global gravitational symmetries is a powerful tool towards classifying gravity theories which admit such a factorisation. In the second part I will discuss how studying the YM origin of local gravitational symmetries can lead to a field dictionary through which the gravitational equations of motion are derived from the YM ones.