No one understands QM

" … many people … understood, in one way or another, the Theory of Relativity .. i can confidently state that no one yet understands Quantum Mechanics “¹ (Richard Feynman)²

Foreword

No one understands quantum mechanics for Feynman and the most important physicists of the 20th century So let’s put our hands together and say that there is nothing to worry about if the sequel turns out to be incomprehensible. A genius like Einstein never accepted Quantum Mechanics, and never really wanted to understand it. Like other founding fathers of the new physics he belonged to a small dissident minority. Prof. Mermin summed up in two words (Shut up and calculate) the attitude of 99% of scientists and the so-called Copenhagen Interpretation (Bohr, Heisenberg, Born, Pauli, …) of quantum theory: no matter if it seems absurd, strange, contrary to intuition and common sense, Quantum Mechanics works too well to be wrong, it is the correct description of nature at the microscopic level … The scientist should not be interested in its deeper meaning and philosophical implications, the only things that really matter are mathematical calculations, accuracy of theoretical predictions, agreement with experimental results and brilliant practical applications