Την Τετάρτη 9 Απριλίου στις 12:00 ο Chris Hull (Imperial College, London) θα δώσει ένα διαδικτυακό σεμινάριο.

Η μετάδοση θα γίνει μέσω Zoom:
https://authgr.zoom.us/j/97686431413?pwd=foAs8MHUNxHiNDJTjjc3Rhn9svrUHj.1

Meeting ID: 976 8643 1413
Passcode: 351845

Ακολουθούν ο τίτλος και η περίληψη της ομιλίας:

Τίτλος: Monopoles, Dirac Strings and Generalised Symmetries

Περίληψη:

Dirac’s quantum theory of magnetic monopoles requires a Dirac string attached to each monopole, and it is important that the fields equations do not depend on the positions of the Dirac strings, provided that they comply with the Dirac veto: they must not intersect the worldliness of electrically charged particles. This theory is revisited and it is shown that it has generalised symmetries related to the freedom of moving the Dirac strings. The Dirac veto is interpreted as an anomaly and the possibility of cancelling the anomaly by embedding in a higher-dimensional theory will be discussed.

This talk is based on arXiv:2411.18741