A general relativity formulation for the Doplicher-Fredenhagen-Roberts noncommutative space-time
arXiv:2004.06741 · doi:10.1209/0295-5075/131/21001
Abstract
The Doplicher, Fredenhagen and Roberts (DFR) noncommutative (NC) formalism is propose in a curved space-time. In DFR approach, the NC parameter is promoted to the set of coordinates of the space-time. As consequence, the field theory defined on this space contains extra dimensions. We propose a metric containing the new coordinates to explain the length measurements of this extended space. We promote the Minkowski part of this extended metric to a metric defined in a curved manifold. Thus, we can build up a NC gravitation model with extra-dimensions. Based on the curved metric, we propose an Einstein-Hilbert action to describe the NC gravitation model on the DFR space. We present the NC version for the gravitational field equations. The weak field approximation is considered in the field equations to obtain the wave equations for the graviton propagation on the DFR space.
6 pages
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