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Quantum correlation


In this course we have established one of the most profound differences between classical and quantum physics, namely that it is not possible to find a local description of individual particles within quantum mechanics. This distinction was expressed as the Bell Theorem and can be tested experimentally using the Bell inequality. We further saw, that quantum physics (in standard interpretation) does not provide any individual description of individual particles, but it still provides a notion of locality. It is not possible to use the special quantum correlations to transmit any signal faster than the speed of light. As a consequence, measurement results in quantum physics are can provide true randomness, i.e., there is no way of predicting individual outcomes of certain quantum measurements.