Variational Principles in Physics

Tamás Biró received a master's degree in Physics and Biophysics and the Ph.D. from Eötvös Loránd University in Budapest. He first worked on theoretical heavy ion physics and strange quark production in quark-gluon plasma at KFKI Research Institute forParticle and Nuclear Pyhsics in Budapest; then, he continued, as Researcher, iat the Niels Bohr Institute in Copenhagen, at the GSI Centre for Heavy Ion Research in Darmstadt and at the Institute for Theoretical Physics at the University of Giessen. From 2013 to 2019, he has been Vice Director of the Institute for Particle and Nuclear Physics at the Wigner Research Centre for Physics in Budapest. He suggested the color rope model for describing the early phase of ultrarelativistic heavy ion collisions in 1983, took part in studies of chaotic dynamics in strongly interacting non-abelian gauge fields (1991-2004), and then, he developed a fable for statistical physics of complex systems and non-extensive thermodynamics. Now, he leads the Nanoplasmonic Laser Inertial Fusion Experiment, NAPLIFE, at the Wigner RCP (2020-2025). He collaborated among others with colleagues at Duke University in North Carolina, USA, at Bergen University in Norway, at the Universities of Cape Town and Johannesburg, South Africa, at the Central China Normal University in Wuhan, China, at the Yukawa Institute in Kyoto, Japan, at the UBB Cluj, Romania, and at TU Wien, Austria. He edited the Acta Physica Hungarica and was Editor in Chief of EPJ A (Hadrons and Nuclei).

Introduction.- Mechanics: geometry of orbits.- Gravity: the optimal curvature.- Electrodynamics: forces, fields, waves.- Quantum mechanics: the most classical non-classical theory.