☆ 4.6 Article

Towards modified bimetric theories within non-product spectral geometry

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL (2022)

Spectral interaction between universes

A. Bochniak et al.

Summary: We have derived a perturbative formula for the direct interaction between two four-dimensional geometries and presented an explicit potential expression up to the third order perturbation based on the spectral action principle. The leading terms of the interaction are expressed as polynomials of the invariants of the two metrics and compared with bimetric gravity models.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2022)

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Article Astronomy & Astrophysics