Monday, 6 June 2016

quantum mechanics - Squaring the momentum operator in QM becomes a second derivative. How?


p22m is the Kinetic energy in classical mechanics. However, the same p2 becomes the second derivative 2x2 in the Kinetic Energy operator in QM. I mean it is strange that a squaring process of a differential in an operator becomes the double differential. How was it deduced in the first place?




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