This work extends double field theory, deriving its action on a constant background from Yang-Mills theory, indicating a broader application of this double copy method.
Double field theory (DFT) can be constructed up to third order as the double copy of Yang-Mills theory. In this construction, one starts with Yang-Mills theory on Minkowski space and the resulting DFT action is also defined on Minkowski space. In this work, I extend this double copy procedure to obtain a DFT action on a constant DFT background starting from two Yang-Mills actions constructed around nontrivial background gauge fields on Minkowski space.
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Rasim Yilmaz (2025) studied this question.
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