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August 2012 A Lorentzian quantum geometry
Felix Finster, Andreas Grotz
Adv. Theor. Math. Phys. 16(4): 1197-1290 (August 2012).


We propose a formulation of a Lorentzian quantum geometry based on the framework of causal fermion systems. After giving the general definition of causal fermion systems, we deduce space-time as a topological space with an underlying causal structure. Restricting attention to systems of spin dimension two, we derive the objects of our quantum geometry: the spin space, the tangent space endowed with a Lorentzian metric, connection and curvature. In order to get the correspondence to differential geometry, we construct examples of causal fermion systems by regularizing Dirac sea configurations in Minkowski space and on a globally hyperbolic Lorentzian manifold. When removing the regularization, the objects of our quantum geometry reduce precisely to the common objects of Lorentzian spin geometry, up to higher-order curvature corrections.


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Felix Finster. Andreas Grotz. "A Lorentzian quantum geometry." Adv. Theor. Math. Phys. 16 (4) 1197 - 1290, August 2012.


Published: August 2012
First available in Project Euclid: 20 August 2014

zbMATH: 1346.82002
MathSciNet: MR3053970

Rights: Copyright © 2012 International Press of Boston

Vol.16 • No. 4 • August 2012
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