ABSTRACT
This chapter explores the opinion on this subject given by a few luminaries of quantum physics: Paul Adrien Maurice Dirac, R. P. Feynman, H. Haken, and W. E. Lamb. An advance directly related to the physics of entanglement is quantum teleportation. Quantum mechanics came to light via the work of Max Planck, published in 1901. In that contribution, Planck used concepts of thermodynamics to explain the energy distribution of light sources as a function of wavelength. The Principles of Quantum Mechanics is the landmark book written by one of the creators of quantum mechanics Dirac. The first edition of this masterpiece was published in 1930, the second edition in 1935, and the third edition in 1947. The use of quantum physics in macroscopic optics is not unique to Dirac. In 1965, Feynman used his path integrals to describe divergence and diffraction resulting from the passage through a Gaussian slit.
