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Sep 27 – 30, 2016
DESY Hamburg
Europe/Berlin timezone

Green-Schwarz superstring on the lattice

Sep 29, 2016, 4:45 PM
15m
Seminar room 1 (DESY Hamburg)

Seminar room 1

DESY Hamburg

Notkestrasse 85, 22607 Hamburg
String & Mathematical Physics Parallel Session: Strings & Mathematical Physics

Speaker

Dr Lorenzo Bianchi (Hamburg University)

Description

We consider possible discretizations for a gauge-fixed Green-Schwarz action of Type IIB superstring. We use them for measuring the action, from which we extract the cusp anomalous dimension of planar N=4 SYM as derived from AdS/CFT, as well as the mass of the two AdS excitations transverse to the relevant null cusp classical string solution. For both the observables, we find a good agreement for large g, which is the perturbative regime of the sigma-model. For smaller values of g, the expectation value of the action exhibits a deviation compatible with the presence of quadratic divergences. After their non-perturbative subtraction the continuum limit can be taken, and suggests a qualitative agreement with the non-perturbative expectation from AdS/CFT.

Primary author

Dr Lorenzo Bianchi (Hamburg University)

Co-author

Dr Valentina Forini (Humboldt University Berlin)

Presentation materials