Dirac's Poem for Squeezed States and Entangled Oscillators

According to Karl Marx, the point is to change the world. From the ancient times, many people changed the world by writing poems. The Book of Psalms from the Old Testament makes us happy and give us inspirations.

Dirac met people, but he seldom communicated with them. Why?

How did he talk to Einstein?
copyright@2013 by Y. S. Kim, unless otherwise specified. The photo of Dirac and Feynman is from the Caltech Photo Archives. This photo was taken by Marek Holzman during the International Conference on Relativitic Theory of Gravitation in Warsaw (Poland) on July 25-31 1962, organized by Leopold Infeld.