The Birth of a New Mechanics

Luigi Accardi

The date of birth of the \new" quantum mechanics (as opposed to the old semiclassical theory) is usually identi ed with the publication of Heisenberg's paper where the commutation relations were rst introduced (1925). One year after it became clear, with the emergence of the statistical interpretation, that this theory was as much a new mechanics as a new probability calculus.

Henri Poincaré

Mohamed Daris

Relativity and quantum mechanics remain two very binding things and are both separating either by method or by physical experience. In this section I will make an approach to better facilitate a connection between quantum mechanics and relativity that gives us a new vision on the fact that the two concepts can be related theoretically and experimentally to give birth to the new principles in the physical theory and to better improve theoretical and experimental research.

Henri Poincaré

Mohamed Daris

Relativity and quantum mechanics remain two very binding things, and both are separating either by method or physical experience. In this section, I will make an approach to better facilitate a connection between quantum mechanics and relativity that gives us a new vision on the fact that the two concepts can be related theoretically and experimentally to give birth to the new principles in the physical theory and to better improve theoretical and experimental research. The new conception of this principle develops scientific and technical research better.