Exploring weak measurements within the Einstein-Dirac cosmological framework

Williams Dhelonga-Biarufu, Dominique Lambert

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Abstract

Our study applies the two-state formalism alongside weak measurements within a spatially homogeneous and isotropic cosmological framework, wherein Dirac spinors are intricately coupled to classical gravity. We compute the weak values of the energy-momentum tensors, the Z component of spin, and the pure states. Weak measurements are a generalization and extension of the computation already made by Finster and Hainzl [A spatially homogeneous and isotropic Einstein-Dirac cosmology, J. Math. Phys. (N.Y.) 52, 042501 (2011)JMAPAQ0022-248810.1063/1.3567157] in a spatially homogeneous and isotropic Einstein-Dirac cosmology. Our analysis reveals that the acceleration of the Universe expansion can be understood as an outcome of postselection, underscoring the effectiveness of weak measurement as a discerning approach for gauging cosmic acceleration.

Original languageEnglish
Article number083503
JournalPhysical review D
Volume110
Issue number8
DOIs
Publication statusPublished - 15 Oct 2024

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