Την Τετάρτη 30 Απριλίου στις 12:00 o Marco Meineri (University of Torino) θα δώσει ένα διαδικτυακό σεμινάριο.

Η μετάδοση θα γίνει μέσω Zoom:
https://authgr.zoom.us/j/97126294488?pwd=yTupdyTFWXIFvsCb3AMdXU41VbuWQs.1

Meeting ID: 971 2629 4488
Passcode: 163657

Ακολουθούν ο τίτλος και η περίληψη της ομιλίας:

Title: No-go theorems for higher-spin charges in AdS_2

Abstract: Higher-spin conserved currents and charges feature prominently in integrable 2d QFTs in flat space. Motivated by the question of integrable field theories in Anti de-Sitter space, we consider the consequences of higher-spin currents for QFTs in AdS2, and find that their effect is much more constraining than in flat space. Specifically, it is impossible to preserve: (a) any higher-spin charges when deforming a massive free field by interactions, or (b) any spin-4 charges when deforming a CFT by a Virasoro primary. Along the way, we explain how higher-spin charges lead to integer spacing in the spectrum of primaries and to constraints on correlation functions. We also comment on consequences for critical long-range statistical models.