7. Einstein-Podolsky-Rosen Paradox Challenges Quantum Theory (1935)
Einstein, Podolsky and Rosen (EPR) imagine a gedankenexperiment designed to point out a flaw in quantum mechanics: the theory conflicts with local realism. Experiments later vindicate quantum mechanics by confirming the violation of Bell inequalities. But the EPR paper also introduces the property now known as entanglement, which becomes the basis for the field of quantum information.
What is EPR Paradox?
The answer to EPR Paradox is Bell’s theorem: