most citedUntwisting the double copy: the zeroth copy as an optical seed

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hep-th2026★ 1 cited

Untwisting the double copy: the zeroth copy as an optical seed

Damien A. Easson, Michael J. Falato

We present a historical optical foundation for stationary vacuum Kerr--Schild spacetimes on a flat background and interpret it in modern double-copy language. In this setting, a co…