Exotic Origins of Tensionless Superstrings

TL;DR

This work analyzes the origin of the Inhomogeneous tensionless superstring by seeking tensile parent theories that flow to SBMS_I. It presents two exotic pathways—a Maverick tensile string with hermitian fermions and a Flipped string related by a super-Virasoro automorphism—whose tensionless limits yield the inhomogeneous residual symmetry on the worldsheet. The authors construct Bogoliubov transformations and automorphisms to relate tensile and tensionless vacua, obtaining a squeezed tensionless vacuum in the Maverick case and a preserved vacuum in the Flipped case, and discuss the resulting representations. They also discuss connections to ambitwistor strings and the implications for the origin of tensionless dynamics and potential holographic links.

Abstract

A new type of tensionless superstring theory, called the Inhomogeneous tensionless superstring, has been recently introduced. This is characterised by a residual symmetry algebra on the worldsheet richer in structure than the previously known symmetry algebra related to Homogeneous tensionless superstring. In this paper, we investigate theories of tensile superstring that the Inhomogeneous tensionless superstring with manifestly real fermions could arise from. We provide two different candidates for these parent tensile theories. The nature of the limit dictates that these theories have some exotic features.