2021
DOI: 10.48550/arxiv.2109.13906
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Parallel spinor flows on three-dimensional Cauchy hypersurfaces

Abstract: The three-dimensional parallel spinor flow is the evolution flow defined by a parallel spinor on a globally hyperbolic Lorentzian four-manifold. We prove that, despite the fact that Lorentzian metrics admitting parallel spinors are not necessarily Ricci flat, the parallel spinor flow preserves the vacuum momentum and Hamiltonian constraints and therefore the Einstein and parallel spinor flows coincide on common initial data. Using this result, we provide an initial data characterization of parallel spinors on … Show more

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“…We end the introduction by noting that in an interesting different direction, parallel spinors on globally hyperbolic Lorentzian four-manifolds have recently been studied by Murcia-Shahbazi [29,30] building on work of Cortés-Lazaroiu-Shahbazi [9]. In particular, in [29] the authors show that the existence of a globally defined parallel spinor in a globally hyperbolic Lorentzian 4 manifold induces a solution of a hyperbolic flow called the "parallel spinor flow" on a Cauchy hypersurface, and vice versa.…”
Section: (C)mentioning
confidence: 99%
“…We end the introduction by noting that in an interesting different direction, parallel spinors on globally hyperbolic Lorentzian four-manifolds have recently been studied by Murcia-Shahbazi [29,30] building on work of Cortés-Lazaroiu-Shahbazi [9]. In particular, in [29] the authors show that the existence of a globally defined parallel spinor in a globally hyperbolic Lorentzian 4 manifold induces a solution of a hyperbolic flow called the "parallel spinor flow" on a Cauchy hypersurface, and vice versa.…”
Section: (C)mentioning
confidence: 99%