Dr. U. Lombardo carried out his academic activity first as an Associate Professor and then as a Full Professor (1984-2015) in the Department of Physics and Astronomy of the University of Catania (Italy), where he taught courses in Quantum Mechanics and Statistical Mechanics and headed the International PhD School in Nuclear and Particle Astrophysics. He was a research associate at INFN Sezione and Laboratori Nazionali del Sud (Catania), where he did research in Nuclear Physics and Astrophysics and promoted several research Projects funded by Italian and European Programmes. He retired in November 2015.

Dr. Y. Niu earned her Bachelor's degree and her Phd from Peking University (China). She has been Research Assistant at China Academy of Engineering Physics, Post-Doc at National Institute of Nuclear Physics (Italy), and tenured researcher at Extreme Light Infrastructure-Nuclear Physics (ELI-NP). Since 2018, she is a full professor at the School of Nuclear Science and Technology of Lanzhou University (China). Her main research interests concern nuclear structure theory and nuclear astrophysics.

Space-Time Symmetries and Classical Observables.- Superposition Principle.- States and Dynamical Variables.- Space Translations and Momentum.- Elementary Phenomena.- Space Rotations and Angular Momentum.- Time Translations and Hamiltonian.- Harmonic Oscillations.- Approximations to Schr¿odinger's Equation.- Time-Dependent Equations of Motion`.- Time-Dependent Perturbation Theory.- Two-Body Problem: Bound States.- Two-Body Problem: Scattering States.- Many-Body Systems.- The Dirac Equation.- Homogeneous Many-Body Systems.- Semi-Classical Limit.- Collective Modes in Atomic and Nuclear Systems.