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arXiv · 1512.09060

A note about a pure spin-connection formulation of General Relativity and spin-2 duality in (A)dS

Thomas Basile·Xavier Bekaert·Nicolas Boulanger
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Abstract

We investigate the problem of finding a pure spin-connection formulation of General Relativity with non-vanishing cosmological constant. We first revisit the problem at the linearised level and find that the pure spin-connection, quadratic Lagrangian, takes a form reminiscent to Weyl gravity, given by the square of a Weyl-like tensor. Upon Hodge dualisation, we show that the dual gauge field in (A)dS$_D$ transforms under $GL(D)$ in the same representation as a massive graviton in the flat spacetime of the same dimension. We give a detailed proof that the physical degrees of freedom indeed correspond to a massless graviton propagating around the (anti-) de Sitter background and finally speculate about a possible nonlinear pure-connection theory dual to General Relativity with cosmological constant.

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Thomas Basile, Xavier Bekaert, Nicolas Boulanger. 2015-12-30. A note about a pure spin-connection formulation of General Relativity and spin-2 duality in (A)dS. https://doi.org/10.1103/physrevd.93.124047

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