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Dynamics of the Friedmann universe with boundary terms added to the action

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Abstract

We consider the dynamics of the universe following from the variational principle with boundary terms added to the action. We calculate a scalar function that effectively accounts for the contribution of these boundary terms to the density and pressure of the medium filling the universe. An interesting result of the proposed approach is that a superfast expansion stage arises automatically (without additional conditions). We show the connection between the description of inflationary expansion based on the scalar field and our model.

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Acknowledgments

The author is grateful to Yu. V. Pavlov, S. A. Paston, and S. M. Gerasyuta for the useful discussions during the writing of this paper.

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  1. St. Petersburg State University, St. Petersburg, Russia

    V. I. Kochkin

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  1. V. I. Kochkin
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Correspondence to V. I. Kochkin.

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Kochkin, V.I. Dynamics of the Friedmann universe with boundary terms added to the action. Theor Math Phys 206, 236–242 (2021). https://doi.org/10.1134/S0040577921020094

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