1 September 2020 to 31 July 2021
Europe/Rome timezone

Bootstrapping defects and boundaries for the free scalar field

13 Oct 2020, 14:30
1h
https://cern.zoom.us/j/99879024130

https://cern.zoom.us/j/99879024130

http://www.strings.to.infn.it/talks/

Speaker

Balt Van Rees (École Polytechnique)

Description

Is there any room for non-trivial unitary and conformal defects in the theory of a single free massless scalar field? And what about boundaries? We use the free scalar equation of motion and the structure of the bulk-to-defect operator expansion to rule out the existence of such defects in several (co-)dimensions. For boundaries we are led to a non-trivial system of crossing equations that we analyze numerically in four bulk dimensions. We show that large regions of parameter spaces are excluded, but a ‘kink’ in the numerical bounds obeys all our consistency checks and might be an indication of a new conformal boundary condition.

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