Non-Relativistic Superstrings: A New Soluble Sector of AdS_5xS^5

TL;DR

This work identifies a new solvable non-relativistic sector of string theory in $AdS_5\times S^5$ by a wound-string limit with a tuned $B$-field. The authors derive a finite, manifestly supersymmetric worldsheet action that, after gauge fixing, reduces to a free 2D theory of bosons and fermions propagating on $AdS_2$, with a precise mass spectrum and the supersymmetric Newton-Hooke symmetry. They further connect the non-relativistic description to a T-dual time-dependent pp-wave with a compact null coordinate, tying NR string quantization to DLCQ in this background. The results offer a calculable arena to study holography in a stringy regime and suggest a holographic dual in terms of ${\cal N}=4$ SYM on $AdS_2\times S^2$. Overall, the paper opens avenues for exact analysis of NR holography, spectrum, and boundary dynamics in a controlled AdS/CFT-like setting.

Abstract

We find a new sector of string theory in AdS_5xS^5 describing non-relativistic superstrings in that geometry. The worldsheet theory of non-relativistic strings in AdS_5xS^5 is derived and shown to reduce to a supersymmetric free field theory in AdS_2. Non-relativistic string theory provides a new calculable setting in which to study holography.