Studies
Ph.D. in Theoretical Physics
2009 – 2013
Department of Physics, University of Patras
Ph.D. Thesis
Title: Classical noise effects on open systems of entangled qubits
Supervisor: Prof. D. P. K. Ghikas, Department of Physics, University of Patras
Description: The thesis focuses on the study of models of open quantum systems used in quantum computation. Methods are proposed to engineer the environment of such systems in order to protect quantum features such as coherence and entanglement. Noise-induced phenomena such as stochastic resonance (and anti-resonance) and noise shielding are studied in detail, discussing both their theoretical and experimental consequences in the framework of quantum information theory.
M.Sc. in Theoretical Physics, Astrophysics and Computational Physics
2006 – 2009
Department of Physics, University of Patras
M.Sc. Thesis
Title: Decoherence under the influence of external noise
Supervisor: Prof. D. P. K. Ghikas, Department of Physics, University of Patras
Description: The thesis focuses on the study of the entanglement of two qubits belonging to the XY Heisenberg chain inside a noisy magnetic field, as well as the optimization of the system–environment set-up in order to maximize the disentanglement time.
B.Sc. in Physics
2001 – 2006
Department of Physics, University of Patras
B.Sc. Thesis
Title: Vector Calculus and applications in Physics with MAPLE 9
Supervisor: Prof. D. Sourlas, Department of Physics, University of Patras
Description: Development of computer algebra algorithms in MAPLE 9 for applications in Physics.
Scientific Interests
- Computational nonlinear Physics: numerical simulations of nonlinear systems
in Quantum Mechanics and Dynamical Astronomy. - Open quantum systems and quantum information: noise effects on quantum bit systems,
stochastic control of quantum coherence and quantum entanglement. - Stochastic Mechanics: simulations of quantum systems by stochastic classical systems.
- Development of educational programs in Physics with MAPLE and PYTHON.
Referee for International Scientific Journals
Referee for the following international journals:
- Physics Letters A (Elsevier)
- Physica A (Elsevier)
- Results in Physics (Elsevier)
- Physica D (Elsevier)
- Chaos, Solitons & Fractals (Elsevier)
- Chaos (AIP Publishing)
- Journal of Physics A (IOP Publishing)
- Mathematics (AIMS)
- Journal of Applied Nonlinear Dynamics (L&H)
Scientific Societies
- Regular member of the Hellenic Physical Society (HPS) since 2006.
- Regular member of the Hellenic Astronomical Society since 2020.
- Regular member of the European Cooperation in Science
and Technology network (COST) since 2020.
Employment
Postdoctoral Researcher
01/2016 – 08/2023
Research Center for Astronomy and Applied Mathematics
Academy of Athens
Academy of Athens
Funded by the Research Committee of the Academy of Athens
Supervisor: Academician G. Contopoulos
Scientific Collaborator
06/2014 – 12/2015
Research Center for Astronomy and Applied Mathematics
Academy of Athens
Academy of Athens
Supervisor: Prof. C. Efthymiopoulos
Teaching Assistant
02/2013
Department of Physics, University of Patras
Tutorial classes in Mathematical Analysis for first-year undergraduate students.
Assistant Lecturer
09/2011
University of Patras
Laboratory Teaching
02/2011
University of Patras
Laboratory courses in Nuclear Physics, Fluid Mechanics, and Optics.
Laboratory Assistant
09/2008
University of Patras
Other Professional Activities
Physics Tutor
2007 –2022
Private tutoring in undergraduate-level Physics and Mathematics to approximately
70 students of
the University of Patras and 30 students of the National and Kapodistrian
University of Athens.
Subjects include Thermodynamics, Analytical Mechanics, Electromagnetism,
Differential Equations,
Quantum Mechanics, Vector Analysis, and Special Relativity.
Librarian
2008 – 2009
Department of Physics Library, University of Patras
Computer Skills
- Expert: Maple, Python, LaTeX
- Advanced: FORTRAN, Microsoft Office (Word, Excel, PowerPoint), Origin, GIMP, Linux Libre Office
Symbolic and Numerical Computations
- Maple: 21 years of experience in symbolic computations.
- Python: 10 years of experience in numerical calculations.
Program Database
From 2016 to today, more than 1000 programs have been written for simulations of classical and quantum dynamical systems.
Languages
- Greek (Native)
- English (Fluent)
- German (Intermediate)
Publications in International Peer-Reviewed Journals
-
Contopoulos G., Tzemos A.C. and Zanias F.,
“Limits of the formal integrals of motion”,
Journal of Physics A, 58, 395701 (2025). -
Tzemos A.C., Contopoulos G. and Zanias F.,
“Bohmian Chaos and Entanglement in a Two-Qubit System”,
Entropy, 27, 832 (2025). -
Tzemos A.C., Contopoulos G. andZanias F.,
“Orbits in the integrable Hénon–Heiles systems”,
Physica Scripta, 100, 055233 (2025). -
Contopoulos G., Tzemos A.C. and Zanias F.,
“Integrals and chaos in generalized Hénon–Heiles Hamiltonians”,
Physica Scripta, 100, 045225 (2025). -
Tzemos A.C. and Contopoulos G.,
“A comparison between classical and Bohmian quantum chaos”,
Chaos, Solitons & Fractals, 188, 115524 (2024). -
Contopoulos G. andTzemos A.C.,
“Classical and Bohmian trajectories in integrable and nonintegrable systems”,
Particles, 7, 1062 (2024). -
Tzemos A.C. and Contopoulos G.,
“Formal Integrals of Motion in Time Periodic Hamiltonian Systems”,
Maple Transactions, Article 17296 (2024). -
Tzemos A.C. and Contopoulos G.,
“Dynamics of quantum observables and Born’s rule in Bohmian quantum mechanics”,
Chaos, Solitons & Fractals, 185, 115075 (2024). -
Harsoula M. and Tzemos A.C.,
“The Building Blocks of the Spiral Arms in Galaxies”,
Journal of Vibration Testing and System Dynamics, 8, 155 (2024). -
Tzemos A.C. and Contopoulos G.,
“Order, Chaos and Born’s Distribution of Bohmian Particles”,
Particles, 6, 923 (2023). -
Tzemos A.C. and Contopoulos G.,
“Unstable Points, Ergodicity and Born’s Rule in 2D Bohmian Systems”,
Entropy, 25, 1089 (2023). -
Tzemos A.C. and Contopoulos G.,
“Chaos and ergodicity in a partially integrable 3D Bohmian system”,
Physica Scripta, 98, 065223 (2023). -
Contopoulos I., Tzemos A.C., Zanias F. and Contopoulos G.,
“Interference with Non-Interacting Free Particles and a Special Type of Detectors”,
Particles, 6, 121 (2023). -
Harsoula M., Efthymiopoulos C., Contopoulos G. and Tzemos A.C.,
“Perturbed precessing ellipses as the building blocks of spiral arms in a barred galaxy with two pattern speeds”,
Astronomy & Astrophysics, 667, A33 (2022). -
Tzemos A.C. and Contopoulos G.,
“Born’s rule in multiqubit Bohmian systems”,
Chaos, Solitons & Fractals, 164, 112650 (2022). -
Tzemos A.C. and Contopoulos G.,
“Bohmian chaos in multinodal bound states”,
Foundations of Physics, 52, 85 (2022). -
Tzemos A.C. and Contopoulos G.,
“Bohmian quantum potential and chaos”,
Chaos, Solitons & Fractals, 160, 112151 (2022). -
Tzemos A.C. and Contopoulos G.,
“Chaos and ergodicity in entangled non-ideal Bohmian qubits”,
Chaos, Solitons & Fractals, 156, 111827 (2022). -
Tzemos A.C. and Contopoulos G.,
“Ergodicity and Born’s rule in an entangled three-qubit Bohmian system”,
Physical Review E, 104, 054211 (2021). -
Tzemos A.C. and Contopoulos G.,
“The role of chaotic and ordered trajectories in establishing Born’s rule”,
Physica Scripta, 96, 065209 (2021). -
Tzemos A.C. and Contopoulos G.,
“Order and chaos in time-periodic Hamiltonian systems”,
Physica D, 419, 132847 (2021). -
Tzemos A.C. and Contopoulos G.,
“Integrals of Motion in Time-periodic Hamiltonian Systems: The Case of the Mathieu Equation”,
Regular and Chaotic Dynamics, 26, 89 (2021). -
Tzemos A.C. and Contopoulos G.,
“Ergodicity and Born’s rule in an entangled two-qubit Bohmian system”,
Physical Review E, 102, 042205 (2020). -
Contopoulos G. and Tzemos A.C.,
“Chaos in Bohmian Quantum Mechanics: A short review”,
Regular and Chaotic Dynamics, 25, 476 (2020). -
Tzemos A.C. and Contopoulos G.,
“Chaos and ergodicity in an entangled two-qubit Bohmian system”,
Physica Scripta, 95, 065225 (2020). -
Tzemos A.C., Contopoulos G. and Efthymiopoulos C.,
“Bohmian trajectories in an entangled two-qubit system”,
Physica Scripta, 94, 105218 (2019). -
Tzemos A.C., Efthymiopoulos C. and Contopoulos G.,
“Origin of chaos near three-dimensional quantum vortices”,
Physical Review E, 97, 042201 (2018). -
Tzemos A.C. and Contopoulos G.,
“Integrals of motion in 3D Bohmian trajectories”,
Journal of Physics A, 51, 075101 (2018). -
Contopoulos G., Tzemos A.C. and Efthymiopoulos C.,
“Partial integrability of 3D Bohmian trajectories”,
Journal of Physics A, 50, 195101 (2017). -
Efthymiopoulos C., Contopoulos G. and Tzemos A.C.,
“Chaos in de Broglie–Bohm quantum mechanics and the dynamics of quantum relaxation”,
Annales de la Fondation Louis de Broglie, 42, 133 (2017). -
Tzemos A.C., Contopoulos G. and Efthymiopoulos C.,
“Origin of chaos in 3D Bohmian trajectories”,
Physics Letters A, 380, 3796 (2016). -
Tzemos A.C. and Ghikas D.P.K.,
“Dependence of noise induced effects on state preparation in multiqubit systems”,
Physics Letters A, 377, 2307 (2013). -
Ghikas D.P.K. and Tzemos A.C.,
“Stochastic anti-resonance in the time evolution of interacting qubits”,
International Journal of Quantum Information, 10, 1250023 (2012).
Conference Publications and Refereed Proceedings
-
Tzemos A.C.:
“Ordered and Chaotic Bohmian Trajectories”,
Chaos, Fractals and Complexity, Springer Proceedings in Complexity (2023). -
Tzemos A.C. and Contopoulos G.:
“Chaos in 2D Bohmian Trajectories”,
Maple Transactions, Vol. 2, No. 1. -
Tzemos A.C.:
“Quantum trajectories: an overview with Maple”,
Electronic Poster and Presentation, Contributed Talk, Maple Virtual Conference, Waterloo, Canada (2021). -
Tzemos A.C.:
“Ergodicity and Born’s rule in entangled Bohmian qubits”,
Electronic Poster, Quantum Thermodynamics Conference (2021). -
Tzemos A.C.:
“Studying Born’s rule with entangled Bohmian qubits”,
Electronic Poster, Vienna Quantum Foundations Conference (2021). -
Tzemos A.C.:
“Order and chaos in two entangled Bohmian qubits”,
Electronic Poster and Presentation, Virtual Bristol Quantum Information Technologies Workshop, University of Bristol (2021). -
Tzemos A.C.:
“Born’s rule in the case of two entangled Bohmian qubits”,
Contributed Talk, 6th International Conference for Young Quantum Information Scientists, Michigan State University (2021). -
Tzemos A.C.:
“Chaos and entanglement in Bohmian qubits”,
Electronic Poster and Presentation, Conference Quantum 2020 (2020). -
Tzemos A.C.:
“Order and chaos in Bohmian Quantum Mechanics”,
Proceedings of the 17th Hellenic Conference of Physics, Thessaloniki, Greece (2018). -
Tzemos A.C.:
“The mechanism of chaos in 3D Bohmian trajectories”,
Poster, International School of Physics “Enrico Fermi” on the Foundations of Quantum Mechanics, Varenna – Lake Como, Italy (2016). -
Tzemos A.C.:
“The concept of the quantum state”,
Proceedings of the 16th Hellenic Conference of Physics, Aegina, Greece (2016). -
Tzemos A.C. and Ghikas D.P.K.:
“Noise effects on interacting qubits”,
Poster, 4th International Workshop on Statistical Mechanics and Dynamical Systems, Kritiki Estia, Athens, Greece (2014). -
Ghikas D.P.K., Tzemos A.C., and Stamatiou G.:
“Systems of qubits in chaotic and noisy environments: possible effects of local environments on quantum coherence properties”,
Poster, Noise, Information and Complexity at the Quantum Scale, Ettore Majorana Centre, Erice, Sicily, Italy (2013).
Talks, Conferences, Seminars & Summer Schools
Participation in Scientific Conferences, Seminars and Educational Schools
- 15–17 December 2025 – “When Quantum Field Theory Meets Quantum Information”, Universidad Carlos III de Madrid, Spain.
- 16 December 2025 – Universidad Complutense Madrid, Spain. Invited talk: “Chaos in Bohmian Quantum Mechanics”.
- 5–7 November 2025 – Maple Conference 2025, Waterloo, Canada (Virtual). Contributed talk: “Chaos in Interacting Oscillators: A Classical and Bohmian Perspective”.
- 20–24 October 2025 – “100 Years of Quantum: Perspectives on its Past, Present, and Future”, Perimeter Institute for Theoretical Physics, Toronto, Canada (Virtual).
- 7–15 July 2025 – 31st Summer School–Conference on Dynamical Systems and Complexity, Lamia. Contributed talk: “Bohmian chaos and the origin of Born’s rule”.
- 23–27 June 2025 – XLV Dynamics Days 2025, Thessaloniki. Contributed talk: “Chaotic Bohmian trajectories and the origin of Born’s rule”.
- 30 September – 3 October 2024 – 13th International Conference on Mathematical Modeling in Physical Sciences, Kalamata (Virtual). Contributed talk: “Introduction to Bohmian Quantum Chaos”.
- 24–25 October 2024 – Maple Conference 2024, Waterloo, Canada (Virtual). Invited lecture: “Partial Ergodicity in 2D Bohmian Trajectories”.
- 15–20 September 2024 – HERA 24 “The Nature and the Dynamics of Structures Observed in Galactic Disks”, WE Heraeus–EAS Early Career Researchers in Astronomy Workshop, Academy of Athens. Member of the local organizing committee.
- 8–10 March 2024 – 20th National Physics Conference, Lamia. Contributed talk: “Chaos and Born’s Rule in Entangled Bohmian Qubits”.
- 25 July 2023 – 29th Summer School on Dynamical Systems and Complexity, National Centre for Scientific Research “Demokritos”, Athens. Invited talk: “Introduction to Bohmian Quantum Chaos”.
- 12 July 2023 – 29th Summer School on Dynamical Systems and Complexity, NCSR “Demokritos”, Athens. Invited talk: “Introduction to Bohmian Quantum Chaos”.
- 12 July 2022 – 28th Summer School on Dynamical Systems and Complexity, Chania. Invited talk: “Order and Chaos in Bohmian Quantum Mechanics”.
- 13–19 September 2021 – Second Kyoto Workshop on Quantum Information, Computation and Foundations (Virtual).
- 19 July 2021 – 27th Summer School on Dynamical Systems and Complexity, Athens (Virtual). Invited talk: “Born’s Rule in the Case of Two Entangled Bohmian Qubits”.
- 15 June 2021 – Quantum Computing Hardware and Software Summer School, Lausanne (Virtual).
- 17 July 2019 – 26th Summer School on Dynamical Systems and Complexity, National Technical University of Athens. Invited talk: “Quantum Entanglement and Bohmian Mechanics”.
- 12 July 2018 – 25th Summer School on Dynamical Systems and Complexity, NCSR “Demokritos”, Athens. Invited talk: “3D Bohmian Chaos: A Brief Review”.
- 16 March 2018 – 17th Hellenic Conference of Physics, Thessaloniki. Invited talk (Hellenic Physical Society – Students Section): “The Transition from Undergraduate Studies to Research”, and contributed talk: “3D Bohmian Chaos: A Brief Review”.
- 11 July 2017 – Scientific Seminar, Christian Association of Scientists, Athens. Invited lecture: “Testimonies of Faith from the Founders of Quantum Mechanics”.
- 7 December 2016 – Scientific Seminar, Patras Astronomical Society “Orion”. Invited lecture: “Quantum Paradoxes”.
- 3–25 September 2016 – Workshop on the Euripus Phenomenon, Chalkida. Invited lecture: “Tides on Earth”.
- 7–13 July 2016 – International School of Physics “Enrico Fermi” on the Foundations of Quantum Mechanics, Varenna – Lake Como, Italy. Poster presentation.
- 19 March 2016 – Hellenic Conference of Physics, Hellenic Physical Society, Aegina. Invited talk: “The Quantum State”.
- 15 November 2015 – Scientific Seminar, Christian Association of Scientists, Athens. Invited lecture: “Quantum Instantaneous Transmission of Information”.
- 22 November 2014 – Scientific Seminar, Christian Association of Scientists, Athens. Invited lecture: “Quantum Information”.
- 29 October 2014 – Scientific Seminar, Patras Astronomical Society “Orion”. Invited lecture: “Entropy in Classical and Quantum Physics”.
- 14–25 July 2014 – 4th European PhD Summer School and Workshop on Mathematical Modeling of Complex Systems, Kritiki Estia, Athens. Poster presentation.
- 9–12 April 2013 – Rome School on Open Quantum Systems and the Quantum–Classical Boundary, Sapienza University of Rome. Partially funded by COST Action MP1006 and CECAM.
-
15 February 2012 – Scientific Seminar, Patras Astronomical Society “Orion”.
Invited lecture: “Quantum Spin”.
- June 2011 – Summer School on Fundamental Research in Physics and Materials Science, NCSR “Demokritos”.
-
25 November 2010 – Scientific Seminar, Patras Astronomical Society “Orion”.
Invited lecture: “Quantum Physics and Stochastic Processes”.
Talks at RCAAM (Academy of Athens) Seminar Series
- 4 June 2024 – “Advances in Bohmian Chaos”.
- 31 January 2023 – “Ergodicity and Born’s Rule in Multiqubit Systems”.
- 22 February 2022 – “Chaos and Bohmian Quantum Potential”.
- 18 January 2022 – “Born’s Rule in the Case of Three Entangled Bohmian Qubits”.
- 13 May 2021 – “Born’s Rule in the Case of Two Entangled Bohmian Qubits”.
- 28 February 2020 – “Chaos and Ergodicity in the Trajectories of Two Entangled Bohmian Qubits”.
- 5 November 2019 – “Bohmian Trajectories of Entangled Qubits”.
- 5 February 2019 – “Bohmian Trajectories of Three-Qubit Entangled Systems”.
- 16 October 2018 – “The Effect of Entanglement on the Bohmian Trajectories of a Two-Qubit System”.
- 19 December 2017 – “A Review of Chaos in Bohmian Quantum Mechanics”.
- 20 June 2017 – “Partial Integrability in 3D Bohmian Trajectories”.
- 4 October 2016 – “3D Bohmian Chaos”.
- 1 December 2015 – “Quantum Paradoxes”.
- 24 March 2015 – “Entropy in Quantum Mechanics”.
- 17 June 2014 – “Noise Effects on Open Quantum Systems”.
Links
Institutions & Academic Bodies
- Academy of Athens
- National Observatory of Athens
- National Centre for Scientific Research “Demokritos”
- University of Patras
- Department of Physics, University of Patras
Research Communities & Networks
- Hellenic Astronomical Society
- Patras Astronomical Society “Orion”
- CECAM – Centre Européen de Calcul Atomique et Moléculaire
- Bohmian Mechanics Network
- Quantum Technology Conferences
- Dynamical Systems Conferences
Journals
Contact
Address: Soranou Efesiou 4 Athens, GR-11527
Office 4.1.11B
(Ground Floor)
Email: atzemos@academyofathens.gr
Phone: +30 210 6597507
Profiles: Google Scholar · ORCID · Research Gate