Galilean first-order formulation for the nonrelativistic expansion of general relativity

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We reformulate the Palatini action for general relativity in terms of moving frames that exhibit local Galilean covariance in a large speed of light expansion. For this, we express the action in terms of variables that are adapted to a Galilean subgroup of the GL(n, R) structure group of a general frame bundle. This leads to a novel Palatini-type formulation of general relativity that provides a natural starting point for a first-order nonrelativistic expansion. in doing so, we show how a comparison of Lorentzian and Newton-Cartan metric compatibility explains the appearance of torsion in the nonrelativistic expansion.

OriginalsprogEngelsk
ArtikelnummerL061501
TidsskriftPhysical Review D
Vol/bind104
Udgave nummer6
Antal sider6
ISSN2470-0010
DOI
StatusUdgivet - 22 sep. 2021

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