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arXiv · 2602.19985

Instanton Solutions of the Topological A-model Dual to Free Super-Yang-Mills

Nathan Berkovits
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Abstract

A topological A-model constructed from supertwistor variables and a worldsheet U(1) gauge field was recently proposed to describe the $AdS_5\times S^5$ superstring at zero radius which is dual to free N=4 d=4 super-Yang-Mills. In this note, holomorphic worldsheet instanton solutions of the supertwistor variables are constructed where the U(1) worldsheet gauge field is identified with the square-root of the Strebel differential that describes the ribbon graph on the worldsheet.

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Nathan Berkovits. 2026-02-23. Instanton Solutions of the Topological A-model Dual to Free Super-Yang-Mills. https://arxiv.org/abs/2602.19985

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