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gr-qc2021
Big-Bounce in projectively invariant Nieh-Yan models: the Bianchi I case
Flavio Bombacigno, Simon Boudet, Gonzalo J. Olmo +1
We show that the Nieh-Yan topological invariant breaks projective symmetry and loses its topological character in presence of non vanishing nonmetricity. The notion of the Nieh-Yan…
gr-qc2021★ 47 cited
Big-bounce and future time singularity resolution in Bianchi I: the projective invariant Nieh-Yan case
Flavio Bombacigno, Simon Boudet, Gonzalo J. Olmo +1
We extend the notion of the Nieh-Yan invariant to generic metric-affine geometries, where both torsion and nonmetricity are taken into account. Notably, we show that the properties…