BMN tensionless strings as a full theory of quantum gravity in pp-wave backgrounds

Establish whether tensionless BMN closed strings furnish a complete theory of quantum gravity in pp-wave backgrounds with infinite spacetime curvature and Ramond–Ramond flux.

Background

To test the proposed entropy bound in a controlled setting, the authors consider pp-wave backgrounds and BMN strings. They refer to prior work proposing that tensionless BMN closed strings describe a full theory of quantum gravity in such special backgrounds, enabling precise computations via holography that include all genus contributions.

Confirming this conjecture would strengthen the use of BMN strings as a definitive testbed for quantum gravity effects on entropy and for connecting microscopic calculations to cosmological entropy scales.