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Unimodular Gauge in Perturbative Gravity and Supergravity

Abstract : This paper explains the Unimodular gauge fixing of gravity and supergravity in the framework of a perturbative BRST construction. The unphysical sector contains additional BRST-exact quartets to suppress possible ambiguities and impose both the Unimodular gauge fixing condition on the metric and a gauge condition for the reparametrization symmetry of the unimodular part of the metric. The Unimodular gauge choice of the metric must be completed by a $\gamma$-Traceless gauge condition for the Rarita--Schwinger field in the case of supergravity. This gives an interesting new class of gauges for gravity and supergravity.
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Submitted on : Tuesday, April 28, 2020 - 10:18:25 PM
Last modification on : Wednesday, May 27, 2020 - 3:54:44 PM

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Laurent Baulieu. Unimodular Gauge in Perturbative Gravity and Supergravity. 2020. ⟨hal-02557694⟩



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