The Einstein–Podolsky–Rosen paradox or EPR paradoxof 1935 is an influential thought experiment in quantum mechanics with which Albert Einstein and his colleagues Boris Podolsky and Nathan Rosen ("EPR")claimed to demonstrate that the wave function does not provide a complete description of physical reality, and hence that the Copenhagen interpretation is unsatisfactory;resolutions of the paradox have important implications for the interpretation of quantum mechanics.The essence of the paradox is that particles can interact in such a way that it is possible to measure both their position and their momentum more accurately than Heisenberg's uncertainty principle allows,unless measuring one particle instantaneously affects the other to prevent this accuracy, which would involve information bei