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- W2963155820 abstract "We review a gravitational model based on noncommutative geometry and the spectral action principle. The space-time geometry is described by the tensor product of a four-dimensional Riemanian manifold by a discrete noncommutative space consisting of only two points. With a specific choice of the finite dimensional involutive algebra, the non commutative spectral action leads to the standard model of electroweak and strong interactions minimally coupled to Einstein and Weyl gravity. We present the main mathematical ingredients of this model and discuss their physical implications. We argue that the doubling of the algebra is intimately related to dissipation and the gauge field structure. We then show how this noncommut ative spectral geometry model, a purely classical construction, carries implicit in the do ubling of the algebra the seeds of quantization. After a short review on the phenomenological consequences of this geometric model as an approach to unification, we discuss some of its cosmologic al consequences. In particular, we study deviations of the Friedmann equation, propagation of gravitational waves, and investigate whether any of the scalar fields in this model could play the ro le of the inflaton." @default.
- W2963155820 created "2019-07-30" @default.
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- W2963155820 date "2012-08-14" @default.
- W2963155820 modified "2023-10-04" @default.
- W2963155820 title "Noncommutative spectral geometry: A guided tour for theoretical physicists" @default.
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- W2963155820 doi "https://doi.org/10.22323/1.155.0053" @default.
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