Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Faculty Publications Article Faculty Publications -Articles Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource Kavya, N.S.; Mishra, Sai Swagat; Sahoo, P.K.; Capozziello, Salvatore Title A name given to the resource Cosmic acceleration from topological fluctuations of quantum spacetime Date A point or period of time associated with an event in the lifecycle of the resource 01-01-2026 Source A related resource from which the described resource is derived Journal of High Energy Astrophysics;Volume;53;Issue;;Article No.;100621; Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1016/j.jheap.2026.100621" target="_blank" rel="noreferrer noopener">https://doi.org/10.1016/j.jheap.2026.100621</a> <br /><br /><a href="https://www.scopus.com/pages/publications/105036332356?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/105036332356?origin=resultslist</a> Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Kavya N.S., Center for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to be University), Bengaluru 560029, India; Mishra S.S., Department of Mathematics, School of CS &amp; AI, SR University, Telangana, Warangal, 506371, India; Sahoo P.K., Department of Mathematics, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Medchal District, Telangana, 500078, India; Capozziello S., Dipartimento di Fisica E Pancini, Universitdegli Studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo, Via Cinthia Edificio 6, Napoli, I-80126, Italy, Scuola Superiore Meridionale, Via Mezzocannone 4, Napoli, I-80134, Italy, Istituto Nazionale di Fisica Nucleare Sezione di Napoli, Via Cinthia, Napoli, I-80126, Italy Description An account of the resource The observed late-time acceleration of the Universe challenges our understanding of gravity and the quantum vacuum. We investigate the framework of Topological Dark Energy, where cosmic acceleration emerges not from a fundamental cosmological constant or exotic fields, but from the topological structure of quantum spacetime. In this picture, the vacuum is a dynamic spacetime foam in which gravitational instantons-non-perturbative configurations in Euclidean quantum gravity-nucleate and alter global topology. The cumulative effect of these processes, coupled to macroscopic gravity through the Gauss-Bonnet invariant, yields a dynamical effective cosmological constant, ?eff. Its sign and magnitude are determined by the statistical ensemble of instantons, allowing the dark energy equation of state to evolve across the phantom divide. By embedding the Topological Dark Energy in a FriedmannLemareRobertsonWalker background, we derive its background and linear perturbative cosmological dynamics and confront the model with DESI DR2 BAO, Union3 supernova, and Planck CMB data. The results show that Topological Dark Energy is observationally viable, reproducing key features of the expansion history while offering a theoretically motivated alternative to ?CDM. 2026 Elsevier B.V. Subject The topic of the resource Accelerated expansion; CMB; DESI BAO; Euclidean quantum gravity; Topological dark energy Publisher An entity responsible for making the resource available Elsevier B.V. Relation A related resource ISSN: 22144048; Language A language of the resource English Type The nature or genre of the resource Article Rights Information about rights held in and over the resource Restricted Access; Hardcopy may be available in the library Format The file format, physical medium, or dimensions of the resource online