``Quarks" of the AdS/CFT spectral problem

par Dmytro Volin (Nordita)

jeudi 28 mars 2013, 11:00 → 12:00 Europe/Paris

Auditorium Vivargent (Annecy-le-Vieux)

Computation of conformal dimensions in planar N=4 SYM using integrability techniques was a hot topic during the last decade, with more than thousand publications devoted to it. I will tell you about our new results in this domain: Instead of the Y-system used previously, we are now able to encode the conformal dimensions, at any value of the 't Hooft coupling, in much simpler way: through certain Riemann-Hilbert problem. This appears to be not only a very beautiful mathematical setup, but also the most efficient approach to explicitly compute the dimensions. For instance, we have analytically computed the so called Konishi anomalous dimension up to 8 loops in perturbation theory.