Attacking strong coupling with large charge (Torino)


We study some (conformal) field theories with global symmetries in the sector where the value of the global charge $ Q $ is large. We find that the low energy excitations of this sector are described by the general form of Goldstone’s theorem in the non-relativistic regime. We also derive the unexpected result that the effective field theory describing such sector of fixed $Q$ contains effective couplings $\lambda_{\rm{eff}}\sim \lambda^b /Q^{a}$, where $ \lambda $ is the original coupling. Hence, large-charge leads to weak coupling.

8 Jun 2017 14:30
Seminario teorico @Università di Torino
Turin, Italy
Domenico Orlando
Domenico Orlando

My research interests include string theory, conformal field theory, supersymmetric gauge theories and integrability