RT Journal Article T1 On AdS to dS transitions in higher-curvature gravity A1 Otero Camaño, Xián A1 Edelstein Glaubach, José Daniel A1 Gomberoff, Andrés A1 Sierra García, Jesús Aníbal K1 Classical Theories of Gravity K1 AdS-CFT correspondence K1 Black holes K1 Models of quantum gravity AB We study the possible existence of gravitational phase transitions from AdS todS geometries in the context of higher-curvature gravities. We use Lanczos-Gauss-Bonnet(LGB) theory with a positive cosmological constant as a toy model. This theory has twomaximally symmetric vacua with positive (dS) and negative (AdS) constant curvature. Weshow that a phase transition from the AdS vacuum to a dS black hole geometry takes placewhen the temperature reaches a critical value. The transition is produced by nucleationof bubbles of the new phase that expand afterwards. We claim that this phenomenon isnot particular to the model under study, that contains Boulware-Deser instabilities, butshall also be part of generic gravitational theories with higher-curvature terms, where theseproblems are absent. A salient feature that emerges when a positive cosmological constantis considered is that the temperature in which these bubbles may form is bounded fromabove. Thermodynamically this property is related to quite an uncommon feature thatthis system exhibits, namely, the existence of a zeroth-order phase transition PB Springer SN 1029-8479 YR 2015 FD 2015 LK http://hdl.handle.net/10347/21458 UL http://hdl.handle.net/10347/21458 LA eng NO Camanho, X.O., Edelstein, J.D., Gomberoff, A. et al. On AdS to dS transitions in higher-curvature gravity. J. High Energ. Phys. 2015, 179 (2015). https://doi.org/10.1007/JHEP10(2015)179 NO The workof JDE and JASG is supported in part by MINECO (FPA2011-22594), Xunta de Galicia(GRC2013-024), the Spanish Consolider-Ingenio 2010 Programme CPAN (CSD2007-00042) and FEDER. AG and JDE gratefully acknowledges support from FONDECYT(Chile) grant 1141309. JDE also wishes to acknowledge support from Marie Curie-IRSES/EPLANET, European Particle Physics Latin American Network, European Union7th Framework Program, PIRSES-2009-GA-246806, and is thankful to the University ofBuenos Aires, PUC Chile and UNAM Mexico for hospitality. AG wishes to thank the TheoryGroup of Santiago de Compostela for their hospitality. JASG acknowledges supportfrom the Spanish FPI fellowship from FEDER grant FPA2011-22594 DS Minerva RD 24 abr 2026