Null Strings Gauged, Reloaded and Quantized, II: Null Strings on Flat Backgorund Have Discrete Spectrum

I. Rasulian; M. M. Sheikh-Jabbari; H. Yavartanoo

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arXiv · 2611.09420

Null Strings Gauged, Reloaded and Quantized, II: Null Strings on Flat Backgorund Have Discrete Spectrum

I. Rasulian·M. M. Sheikh-Jabbari·H. Yavartanoo

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Abstract

We continue our study of the quantization of null strings, strings with Carrollian worldsheets described by an action with two-dimensional (2d) diffeomorphisms, Weyl and Carroll-Weyl scaling as gauge symmetry. We perform light cone gauge quantization of the null strings on flat space background within Schrödinger representation, initiated in arXiv:2607.02970. We show, within the regular separated Schrödinger sector, that bosonic null strings on a flat background have no critical dimensions, have discrete, nonnegative mass-squared levels and are hence free of tachyonic modes.

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I. Rasulian, M. M. Sheikh-Jabbari, H. Yavartanoo. 2026-11-06. Null Strings Gauged, Reloaded and Quantized, II: Null Strings on Flat Backgorund Have Discrete Spectrum. https://arxiv.org/abs/2611.09420

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