Abstract
A definition of a convolution of tensor fields on group manifolds is given, which is then generalised to generic homogeneous spaces. This is applied to the product of gauge fields in the context of ‘gravity = gauge × gauge’. In particular, it is shown that the linear Becchi-Rouet-Stora-Tyutin (BRST) gauge transformations of two Yang-Mills gauge fields generate the linear BRST diffeomorphism transformations of the graviton. This facilitates the definition of the ‘gauge × gauge’ convolution product on, for example, the static Einstein universe, and more generally for ultrastatic spacetimes with compact spatial slices.
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Borsten, L., Jubb, I., Makwana, V. et al. Gauge × gauge = gravity on homogeneous spaces using tensor convolutions. J. High Energ. Phys. 2021, 117 (2021). https://doi.org/10.1007/JHEP06(2021)117
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DOI: https://doi.org/10.1007/JHEP06(2021)117