Cosmological Bianchi Class A models in S\'aez-Ballester theory

TL;DR

This paper investigates the Se1ez-Ballester theory applied to Bianchi Class A cosmological models, concluding it cannot realistically solve the dark matter problem without fine-tuning, but offers insights into structure formation and quantum cosmology.

Contribution

It demonstrates the limitations of Se1ez-Ballester theory for dark matter and provides a quantization approach with exact solutions in the Einstein frame.

Findings

Scalar field behaves as a stiff fluid, not dark matter

Fine-tuning required for scalar and dust component contributions

Exact Wheeler-DeWitt solutions obtained for quantized models

Abstract

We use the S\'aez-Ballester (SB) theory on anisotropic Bianchi Class A cosmological model, with barotropic fluid and cosmological constant, using the Hamilton or Hamilton-Jacobi approach. Contrary to claims in the specialized literature, it is shown that the S\'aez-Ballester theory cannot provide a realistic solution to the dark matter problem of Cosmology for the dust epoch, without a fine tunning because the contribution of the scalar field in this theory is equivalent to a stiff fluid (as can be seen from the energy--momentum tensor for the scalar field), that evolves in a different way as the dust component. To have similar contributions of the scalar component and the dust component implies that their past values were fine tunned. So, we reinterpreting this null result as an indication that dark matter plays a central role in the formation of structures and galaxy evolution, having measureable effects in the cosmic microwave bound radiation, and than this formalism yield to this epoch as primigenius results. We do the mention that this formalism was used recently in the so called K-essence theory applied to dark energy problem, in place to the dark matter problem. Also, we include a quantization procedure of the theory which can be simplified by reinterpreting the theory in the Einstein frame, where the scalar field can be interpreted as part of the matter content of the theory, and exact solutions to the Wheeler-DeWitt equation are found, employing the Bianchi Class A cosmological models.