Now let's find the distribution [of the probability amplitude] in momentum. … We have the interesting result that the amplitude … the width of the Gaussian is different. … the half- width .neta. of the p-distribution is … we make the width of the distribution in … spread out. … [p. 16-9] The Gaussian distribution [for the probability amplitudes] gives the smallest … .h_bar./2. This is a quantitative statement of the …
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