Supersymmetry of Tensionless Rotating Strings in AdS_5 x S^5, and Nearly-BPS Operators

TL;DR

This paper demonstrates that certain rotating strings in AdS_5 x S^5 become tensionless and preserve supersymmetry in the large angular momentum limit, indicating that tests of AdS/CFT probe a nearly-BPS sector.

Contribution

It reveals the supersymmetry properties of tensionless rotating strings in AdS_5 x S^5 and links these to nearly-BPS operators in the dual gauge theory.

Findings

Large J,J' strings are 1/8-supersymmetric and tensionless.

Supersymmetry is enhanced to 1/4 when J=0.

Recent AdS/CFT tests probe a nearly-BPS sector.

Abstract

It is shown that a class of rotating strings in AdS_5 x S^5 with SO(6) angular momenta (J,J',J') preserve 1/8-supersymmetry for large J,J', in which limit they are effectively tensionless; when J=0, supersymmetry is enhanced to 1/4. These results imply that recent checks of the AdS/CFT correspondence actually test a nearly-BPS sector.