Hello! I'm Kostas, a theoretical physicist working on gravity, cosmology, and astrophysics. I am currently a Research Fellow at the University of Malta.

My research focuses on understanding the geometric and physical foundations of gravitational theories and their cosmological implications. I work on topics including modified gravity (teleparallel, Horndeski, Gauss-Bonnet), black holes, wormholes, fundamental symmetries of nature via Noether's theorem, and primordial black holes. Since 2022, I also work on machine learning techniques in cosmology, including neural network reconstructions of cosmological observables and model-independent analyses.

I obtained my PhD from the University of Naples "Federico II" in 2019, with a thesis on Geometric Foundations of Gravity and Applications. Before joining the University of Malta, I held postdoctoral positions at Yangzhou University (China), Aristotle University of Thessaloniki (Greece), Nazarbayev University (Kazakhstan), and a PNRR fellowship at Transilvania University of Brașov (Romania), where I led the COSMOROM project on cosmology with advanced statistics and machine learning.

I also hold a second MSc in Information Systems from the Hellenic Open University (2022).

Research Interests

Modified Gravity Teleparallel Gravity Cosmology Black Holes Wormholes Noether Symmetries Primordial Black Holes Gravitational Waves Machine Learning in Cosmology Neural Network Reconstruction

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As of February 2026

Selected Publications

Primordial black holes as cosmic expansion accelerators K.F. Dialektopoulos et al. — Phys. Lett. B 870, 139948 (2025) arXiv DOI
Teleparallel Gravity: From Theory to Cosmology S. Bahamonde, K.F. Dialektopoulos et al. — Rep. Prog. Phys. 86, 026901 (2023) arXiv DOI
Reviving Horndeski Theory using Teleparallel Gravity after GW170817 S. Bahamonde, K.F. Dialektopoulos, J. Levi Said — Phys. Rev. D 101, 084060 (2020) arXiv DOI
Brans-Dicke Theory with Λ > 0: Black Holes and Large Scale Structures K.F. Dialektopoulos et al. — Phys. Rev. Lett. 115, 181104 (2015) arXiv DOI

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News

Feb 2026 Presented at the 3rd Bangkok Workshop on Gravity & Cosmology, Chulalongkorn University, Thailand.
Jan 2026 Talk at JGRG 34, Yukawa Institute of Theoretical Physics, Kyoto, Japan.
2025 Awarded Honorable Mention at the Gravity Research Foundation Essay Competition.
May 2025 Joined the University of Malta as a Research Fellow.
2026 Visiting Lecturer at University of Thessaly — teaching "Mathematical Modelling II".