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Shane's Chess Information Database Updated +Created
Advanced. Not beginner friendly, very clunky.
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One dimension in position representation:
In three dimensions In position representation, we define it by using the gradient, and so we see that
Video 1.
Position and Momentum from Wavefunctions by Faculty of Khan (2018)
Source. Proves in detail why the momentum operator is . The starting point is determining the time derivative of the expectation value of the position operator.
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