Abstract
The cosmological constant has attained a leading role in recent researches in cosmology. We extend the cosmic no-hair theorem to non-minimally coupled theories of gravity where ordinary matter is also present in the form of a perfect fluid. To achieve this goal we give a set of conditions for obtaining the asymptotic de Sitter expansion independently of any initial data (no fine-tuning problem), that is, we introduce a time-dependent (effective) cosmological constant. Finally, we apply the results to some specific models.
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Capozziello, S., de Ritis, R., Marino, A.A., Rubano, C., Scudellaro, P. (2000). A Possible Way to Define an Effective Cosmological Constant in Scalar-Tensor Cosmologies. In: Casciaro, B., Fortunato, D., Francaviglia, M., Masiello, A. (eds) Recent Developments in General Relativity. Springer, Milano. https://doi.org/10.1007/978-88-470-2113-6_7
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DOI: https://doi.org/10.1007/978-88-470-2113-6_7
Publisher Name: Springer, Milano
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