Ρούπας Ζαχαρίας

• Διδασκαλία Φυσικής, Φροντιστήρια Μέσης Εκπαίδευσης,
• Ερευνητής Αστροφυσικής, European Union Grant holder - Marie Curie Fellow, Πανεπιστήμιο Μιλάνου 2024-...
• Επίκουρος Καθηγητής Θεωρητικής Φυσικής, Βρετανικό Πανεπιστήμιο Αιγύπτου 2019-2023
• Λέκτορας Φυσικής, τμήμα Φυσικής, Πανεπιστήμιο Κρήτης 2022
• Λέκτορας Μαθηματικών, τμήμα Μαθηματικών, Πανεπιστήμιο Ιωαννίνων 2018-2019
• Λέκτορας Μαθηματικών, τμήμα Μαθηματικών, Πανεπιστήμιο Αιγαίου 2017-2018
• Ερευνητής Αστροφυσικής, τμήμα Ατομικής Φυσικής, Πανεπιστήμιο Βουδαπέστης 2015-2017
• Ερευνητής Θεωρητικής Φυσικής, Ινστιτούτο Πυρηνικής Φυσικής, ΕΚΕΦΕ Δημόκριτος 2009-2014
• Διδασκαλία Φυσικής μέσης εκπαίδευσης, φροντιστήρια, Αθήνα 2008-2014
• Επιστημονικός Συντάκτης, Εκδοτική Εταιρεία επιστημονικών εκδόσεων, 2007-2008

Δημοσιεύσεις:

1. Zacharias Roupas. “Spin-up and spin distribution of stellar black holes grown by gas accretion in proto-stellar clusters” Astronomy & Astrophysics, 709, A5, 2026
2. Zacharias Roupas. “Massive black hole formation in proto-stellar clusters via early gas accretion” Particles, 9, 18, 2026 
3. Zacharias Roupas. “Black hole mass function shift in proto-stellar-clusters driven by gas accretion” Astronomy & Astrophysics, 702, Α208, 2025
4. Zacharias Roupas. “Radical reform is needed to combat power abuses in academia” Nature Human Behaviour, 9, 424, 2025
5. Zacharias Roupas. “Self-gravitating isothermal sphere in an expanding background” Physical Review D, 110, 123020, 2024
6. Zacharias Roupas. ‘‘Thermodynamic instability of dark energy equation of state’’ Physics of the Dark Universe, 101181, 2023
7. Zacharias Roupas. ‘‘Detectable universes inside regular black holes’’ European Physical Journal C, 82:255, 2022
8. Zacharias Roupas. ‘‘Thermodynamic origin of quantum time-energy uncertainty relation’’ 
   Journal of Statistical Mechanics: Theory and Experiment, 093207, 2021
9. Zacharias Roupas. ‘‘Gravitational Brownian motion as inhomogeneous diffusion: Black hole populations in globular clusters’’ Astronomy & Astrophysics, 646, A20, 2021
10. Zacharias Roupas, Grigoris Panatopoulos and Ilidio Lopes. ‘‘QCD color superconductivity in compact stars: color-flavor locked quark star candidate for GW190814’’ Physical Review D, 103, 083015, 2021
11. Zacharias Roupas. ‘‘Secondary component of gravitational-wave signal GW190814 as an anisotropic neutron star’’ Astrophysics and Space Science, 366, 9, 2021
12. Zacharias Roupas. ‘‘Relativistic Gravitational Collapse by Thermal Mass’’ Communications in Theoretical Physics, 73, 015401, 2021
13. Amr El-Zant, Zacharias Roupas and Joseph Silk. ‘‘Ejection of supermassive black holes and implications for merger rates in fuzzy dark matter haloes’’ Monthly Notices of the Royal Astronomical Society, 499(2), 2575, 2020
14. Zacharias Roupas and Gamal L. Nashed. ‘‘Anisotropic Neutron Stars Modelling: Constraints in Krori-Barua Spacetime’’ European Physical Journal C, 80, 905, 2020
15. Zacharias Roupas. ‘‘Gravitational Potential from Maximum Entropy Principle’’ Classical and Quantum Gravity, 37, 097001,  2020
16. Zacharias Roupas. ‘‘Statistical Mechanics of Gravitational Systems with Regular Orbits: Rigid Body Model of Vector Resonant Relaxation’’ Journal of Physics A: Mathematical and Theoretical, 53, 045002, 2020
17. Zacharias Roupas and Demosthenes Kazanas. ‘‘Generation of massive stellar black holes by rapid gas accretion in primordial dense clusters’’ Astronomy & Astrophysics, 632, L8, 2019
18. Zacharias Roupas. ‘‘Gravitational Instability Caused by the Weight of Heat’’ Symmetry, 11(12), 1435, 2019
19. Zacharias Roupas and Demosthenes Kazanas. ‘‘Binary Black Hole Growth by Gas Accretion in Stellar Clusters’’ Astronomy & Astrophysics, 621, L1, 2019
20. Zacharias Roupas and Pierre-Henri Chavanis. ‘‘Relativistic Gravitational Phase Transitions and Instabilities of the Fermi Gas’’ Classical and Quantum Gravity, 36, 065001, 2019
21. Zacharias Roupas.‘‘The Gravothermal Instability at all scales: from Turnaround Radius to Supernovae’’ Universe, 5(1), 12, 2019
22. Zacharias Roupas, Bence Kocsis and Scott Tremaine. ‘‘Isotropic–Nematic Phase Transitions in Gravitational Systems’’ The Astrophysical Journal, 842, 90, 2017
23. Zacharias Roupas. ‘‘Thermal Mass Limit of Neutron Cores’’ Physical Review D, 91, 023001, 2015
24. Zacharias Roupas. ‘‘Relativistic Gravothermal Instabilities’’ Classical and Quantum Gravity, 32, 135023, 2015
25. Zacharias Roupas, Minos Axenides, George Georgiou, and Emmanuel N. Saridakis. ‘‘Galaxy clusters and structure formation in quintessence versus phantom dark energy Universe’’ Physical Review D, 89, 083002, 2014
26. Zacharias Roupas. ‘‘Thermodynamical instabilities of perfect fluid spheres in General Relativity’’ 
    Classical and Quantum Gravity, 30, 115018, 2013
27. Zacharias Roupas. ‘‘Corrigendum: Thermodynamical instabilities of perfect fluid spheres in General Relativity’’ Classical and Quantum Gravity, 32, 119501, 2015
28. Minos Axenides, George Georgiou, and Zacharias Roupas. ‘‘Gravitational instabilities of isothermal spheres in the presence of a cosmological constant’’ Nuclear Physics B, 871, 21, 2013
29. Minos Axenides, George Georgiou, and Zacharias Roupas. ‘‘Gravothermal Catastrophe with a Cosmological Constant’’ Physical Review D, 86, 104005, 2012
30. Zacharias Roupas. ‘‘Phase space geometry and chaotic attractors in dissipative Nambu mechanics’’ Journal of Physics A: Mathematical and Theoretical, 45, 195101, 2012
31. F. del Aguila, et al. ‘‘Collider aspects of flavour physics at high Q’’, Contributed section 5. European Physical Journal C, 57, 183, 2008
32. Zacharias Roupas. ‘‘The Cosmological Black Hole’’ AIP Conf. Proc. 2872, 060012, 2023
33. Minos Axenides, George Georgiou, and Zacharias Roupas. ‘‘Gravothermal instability with a cosmological constant in the canonical ensemble’’ J. Phys.: Conf. Ser., 410, 012130, 2013
34. Zacharias Roupas. ‘‘Gravitational-thermodynamic instabilities of isothermal spheres in dS and AdS’’ Universitat de Barcelona, p.31-42, 2013. ISBN-13 : 978-
35. D. Fassouliotis, C. Kourkoumelis, Z. Roupas, and D. Vudragovic. ‘‘The ATLAS Student Event Challenge’’ CERN-ATL-COM-OREACH-2007-001, 2007