Penrose Limit, Holography, and Convergence of Genus Expansion [Unusual Time]

by Prof. Minxin Huang (Hefei University)

Wednesday 28 Jun 2023, 16:00 → 17:00 Europe/Berlin

Penrose limit provides a promising avenue to the stringy  regime in the AdS/CFT holography, giving rise to the pp-wave background.  More recently, we proposed a novel entry of the pp-wave holographic  dictionary, which equated the Berenstein-Maldacena-Nastase (BMN)  two-point functions in free N=4 Yang-Mills theory with the norm squares of the quantum unitary transition amplitudes between the corresponding tensionless strings in the infinite curvature limit. If our proposal is correct, it would not only provide first examples of systematic calculations of (the norms of) the higher genus critical superstring amplitudes, but may also in principle gives exact complete results for any string coupling, due to the convergence of genus expansion.