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I am reading several books on quantum mechanics and they mention some concepts on coherently and incoherently superpose a bunch of wave functions. As my understanding, if there are series of wave functions, which satisfying a certain distribution, the coherent way to calculate the probability is to sum all the wave functions first and then take the |.|^2 to find the probability. For incoherent way, we are adding the probablity for each wave function, is that right? Thanks.

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# Help clarify the probability of pure states and mixture of states

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