Observational constraints on the modified cosmology inspired by string T-duality
We explore the cosmological consequences of a modified cosmology inspired by string T-duality. We incorporate the zero-point length correction, l0, into the gravitational potential and derive the modified Friedmann equations via thermodynamic approach at the apparent horizon of a Friedmann-Robertson...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:dnet:recercat____::452e1e3f5aa740c4b8bbdc17ae1db4a6 |
| Acceso en línea: | https://doi.org/10.1016/j.physletb.2026.140325 https://hdl.handle.net/10459.1/469860 |
| Access Level: | acceso abierto |
| Palabra clave: | String T-duality Minimal length Cosmology |
| Sumario: | We explore the cosmological consequences of a modified cosmology inspired by string T-duality. We incorporate the zero-point length correction, l0, into the gravitational potential and derive the modified Friedmann equations via thermodynamic approach at the apparent horizon of a Friedmann-Robertson-Walker (FRW) universe. The resulting framework introduces a dimensionless coupling parameter quantifying deviations from the standard ΛCDM model. Using Bayesian inference with Cobaya and MCMC sampling, we constrain the model parameter against late-time observations, including PantheonPlus and Union3 Type Ia supernovae, cosmic chronometers, DESI DR2 BAO measurements, and Amati-calibrated GRBs. The joint analysis yields an upper bound (68% C.L.), implying that any deviation from the standard ΛCDM scenario () is extremely small within the current observational precision. Model comparison through the Akaike Information Criterion shows that the ΛCDM and T-duality models provide statistically equivalent fits to the data, exhibiting only a marginal preference for ΛCDM. These results provide the first quantitative observational constraints on the cosmological imprint of string T-duality-inspired modifications and underscore the potential of future high-precision surveys to test possible residual effects of such corrections in the late-time Universe. |
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