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<p>We show that chiral higher-spin gravity with a vanishing cosmological constant admits a class of exact self-dual pp-wave solutions derived from harmonic scalar functions and two principal spinors. These solutions satisfy both the linear and non-linear equations of motion, as they annihilate all higher-order vertices, leading to the equations of motion for free fields on a self-dual background sourced by a positive-helicity spin-2 field. Our method employs a simple Kerr-Schild ansatz for positive-helicity chiral higher-spin fields adapted to the self-dual gravity framework.</p>

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Self-dual pp-wave solutions in chiral higher-spin gravity

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  • 发表日期：

    2025年3月6日

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  • Tung Tran

摘要

We show that chiral higher-spin gravity with a vanishing cosmological constant admits a class of exact self-dual pp-wave solutions derived from harmonic scalar functions and two principal spinors. These solutions satisfy both the linear and non-linear equations of motion, as they annihilate all higher-order vertices, leading to the equations of motion for free fields on a self-dual background sourced by a positive-helicity spin-2 field. Our method employs a simple Kerr-Schild ansatz for positive-helicity chiral higher-spin fields adapted to the self-dual gravity framework.