Ignatios Antoniadis

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Ignatios Antoniadis (born 2 December 1955 in Chios) [1] is a Greek theoretical physicist, specializing in string theory and particle physics. [2]

Contents

Education and career

Antoniadis received in 1977 a degree in mathematics from the University of Athens and in 1978 a Diplôme d'études approfondies (DEA) in theoretical physics from Pierre and Marie Curie University. He received in 1980 his Thèse de troisème cycle (doctorate) from the École normale supérieure and in 1983 his Thèse d'État (higher doctorate) from the École polytechnique. (In 1984 the French academic system replaced the Thése d'État with the habilitation.) At Centre national de la recherche scientifique (CNRS), he was from 1982 to 1986 an attaché de recherche at the Centre de physique théorique (CPHT) of the École polytechnique; during those years he was also from 1983 to 1986 a research associate at SLAC. At CNRS, he was from 1986 to 1992 a chargé de recherche and from 1992 to 2015 a directeur de recherche, class 2 and is from 2015 to the present a directeur of recherche, class 1. At CERN in Geneva, Switzerland, he was from 1986 to 1988 a fellow, from 1996 to 1997 a scientific associate, and from 2000 to 2014 a senior staff member. From 1997 to 2009 he was a part-time professeur chargé des cours at the École polytechnique. [3] In 2011 he gave a talk Testing strings at the LHC? at the international symposium on subnuclear physics held in Vatican City. [4] At the Albert Einstein Center of the University of Bern, [5] he was a senior scientist from 2014 to 2020. [3] In 2021, for six months, he held the International Francqui Professorship in Exact Sciences [6] at KU Leuven-Université Libre de Bruxelles (ULB)-Vrije Universiteit Brussel (VUB). [3] He was at the Institute for Advanced Study from February 2023 to May 2023 and from September 2024 to July 2025. [7]

Antoniadis deals with string theory, tests of string theoretical dualities, quantum gravity, supersymmetry, and grand unified theories (GUTs). He played an important role in the development of superstring theory models in four dimensions (fermionic construction). [8] He is particularly known for his investigations into the possible phenomenology of superstring theory (e.g., grand unified theories at low energies; statements about the particle spectrum; possibly observable effects such as extra dimensions; [9] [10] and possible change in gravitational force at short distances). [11] [12]

Antoniadis was awarded in 1995 the Greek Bodossaki Foundation Prize, in 2000 the silver medal of the CNRS, and in 2002 the Special Prize of the Société Française de Physique (SFP). In 1995 the University of Ioannina gave him an honorary doctorate. In 2008 he received an Advanced Grant from the European Research Commission (ERC). [3]

Selected publications

See also

Related Research Articles

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In physics, string theory is a theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings. String theory describes how these strings propagate through space and interact with each other. On distance scales larger than the string scale, a string looks just like an ordinary particle, with its mass, charge, and other properties determined by the vibrational state of the string. In string theory, one of the many vibrational states of the string corresponds to the graviton, a quantum mechanical particle that carries the gravitational force. Thus, string theory is a theory of quantum gravity.

String field theory (SFT) is a formalism in string theory in which the dynamics of relativistic strings is reformulated in the language of quantum field theory. This is accomplished at the level of perturbation theory by finding a collection of vertices for joining and splitting strings, as well as string propagators, that give a Feynman diagram-like expansion for string scattering amplitudes. In most string field theories, this expansion is encoded by a classical action found by second-quantizing the free string and adding interaction terms. As is usually the case in second quantization, a classical field configuration of the second-quantized theory is given by a wave function in the original theory. In the case of string field theory, this implies that a classical configuration, usually called the string field, is given by an element of the free string Fock space.

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References

  1. biographical information from brief biography in International Symposium Subnuclear Physics, Pontifical Academy of Sciences, 2011
  2. "Ignatios Antoniadis". Hellenica World.
  3. 1 2 3 4 "Prof. Dr. Ignatios Antoniadis Appointed Editor-in-Chief of Astronomy". MDPI (Multidisciplinary Digital Publishing Institute).
  4. Sánchez Sorondo, Marcelo; Zichichi, Antonino, eds. (2014). "Testing strings at the LHC? by Ignatios Antoniadis" (PDF). Subnuclear Physics: Past, Present and Future; Proceedings of the International Symposium, held 30 October - 2 November 2011, held in Vatican City. Scripta Varia, volume 119. Pontifical Academy of Sciences. pp. 497–502.
  5. "Albert Einstein Center". University of Bern. 3 July 2023.
  6. "International Francqui Professor".
  7. "Ignatios Antoniadis - Scholars | Institute for Advanced Study". www.ias.edu. 4 January 2022.
  8. Antoniadis, Ignatios (1993). "Review of free-fermionic 4d string models". arXiv: hep-th/9307002 .
  9. Antoniadis, I. (2007). "Gravity modifications from extra dimensions". Journal of Physics: Conference Series. 68 (1): 012013. Bibcode:2007JPhCS..68a2013A. doi: 10.1088/1742-6596/68/1/012013 . S2CID   250669271.
  10. Antoniadis, I. (2011). "Physics of extra dimensions". Fortschritte der Physik. 59 (11–12): 1127–1134. arXiv: hep-ph/0512182 . Bibcode:2011ForPh..59.1127A. doi:10.1002/prop.201100072.
  11. Antoniadis, I. (2006). "Physics of extra dimensions". Journal of Physics: Conference Series. 33 (1): 170–181. arXiv: hep-ph/0512182 . Bibcode:2006JPhCS..33..170A. doi:10.1088/1742-6596/33/1/015. S2CID   250673789.
  12. Antoniadis, I. (2007). "Gravity modifications from extra dimensions". Journal of Physics: Conference Series. 68 (1): 012013. Bibcode:2007JPhCS..68a2013A. doi: 10.1088/1742-6596/68/1/012013 . S2CID   250669271.