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Brans–Dicke cosmology: thermodynamic viability

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Abstract

Brans–Dicke cosmological models for a spatially isotropic and homogeneous universe are tested in terms of the validity of the generalized second law of thermodynamics (GSL). The investigation is carried out in the Einstein frame. It is found that the models are thermodynamically viable for negative values of the Brans–Dicke parameter \(\omega \) and thus are quite consistent with the recent accelerated expansion of the universe.

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Acknowledgements

Tanima Duary conveys her sincere gratitude to the Council of Scientific and Industrial Research (CSIR), Government of India, for supporting this project financially. She thanks Aritra Biswas for efficacious suggestions and discussions.

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Correspondence to Narayan Banerjee.

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Duary, T., Banerjee, N. Brans–Dicke cosmology: thermodynamic viability. Eur. Phys. J. Plus 135, 4 (2020). https://doi.org/10.1140/epjp/s13360-019-00078-z

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