Spooky action
In the last blog I mentioned about quantum entanglement. Back in 1927, Niels Bohr and Albert Einstein were debating whether quantum mechanics, however strange, renders the world as it really is. In quantum mechanics a particle’s location, polarization and other properties can be indefinite until the moment they are measured. If a pair of particles is generated such that their total spin is known to be zero, the particles will have opposite spins when they are measured. Furthermore, whatever is the distance between the particles, the measurement of one's spin determines another's. Einstein considered such behavior impossible, as it violated the local realism view of causality, referring to it as "spooky action at a distance". As a conclusion in 1935, Einstein with Boris Podolsky and Nathan Rosen published the famous EPR-paper, which supposedly proved that quantum mechanics could not represent reality. Erwin Schrödinger shortly thereafter published a seminal paper defi...