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arXiv · 2410.04624

Bohmian Quantization of a Nonminimal Coupling Cosmology

Isaac Torres·Felipe de Melo Santos·Anderson Almeida da Piedade
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Abstract

In a recent paper we studied the cosmology of Nonminimal Derivative Coupling (NDC) between gravity and a scalar field, which is a non-trivial class of Horndeski. We have shown that it presents a variety of solutions for the scale factor, but there are gravitational waves only for a very restrictive range in phase space, and primordial waves are completely forbidden classically in NDC. In this paper, we apply canonical quantization with the Bohm-de Broglie interpretation to that theory for a small value of the nonminimal coupling constant. We then study two quantum solutions of the Wheeler-DeWitt equation that lead to the perturbation of bouncing and cyclic solutions. By the analysis of the phase space obtained from the guidance equations of Bohm-de Broglie, we study the phase space determined by the scale factor and the scalar field for those quantum solutions in order to investigate three main aspects of that theory: the existence of non-singular solutions, the regions of accelerated expansion, and the regions compatible with the gravitational waves speed constraint. We conclude that there are non-singular solutions with an accelerated expansion period compatible with the constraint.

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Isaac Torres, Felipe de Melo Santos, Anderson Almeida da Piedade. 2024-10-06. Bohmian Quantization of a Nonminimal Coupling Cosmology. https://arxiv.org/abs/2410.04624

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