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Discussing quantum aspects of higher-derivative 3-D gravity in the first-order formalism

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Abstract

In this paper, we reassess the issue of deriving the propagators and identifying the spectrum of excitations associated to the vielbein and spin connection of (1+2)-D gravity in the presence of dynamical torsion, while working in the first-order formulation. A number of peculiarities is pointed out whenever the Chern–Simons term is taken into account along with a combination of bilinear terms in the torsion tensor. We present a procedure to derive the full set of propagators, based on an algebra of enlarged spin-type operators, and we discuss under which conditions the poles of the tree-level 2-point functions correspond to physical excitations that do not conflict with causality and unitarity.

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Correspondence to V. J. Vasquez.

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Helayël-Neto, J.A., de Moraes, L.M. & Vasquez, V.J. Discussing quantum aspects of higher-derivative 3-D gravity in the first-order formalism. Eur. Phys. J. C 67, 311–319 (2010). https://doi.org/10.1140/epjc/s10052-010-1297-3

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  • DOI: https://doi.org/10.1140/epjc/s10052-010-1297-3

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