Wednesday, October 4, 2017

quantum mechanics - Probability current


Conservation of probability: Suppose a wavefunction has ${\partial \mathbb P \over \partial t} = -t f(x,t)$ and ${\partial j \over \partial x} = i f(x,t)$. How does it follow that ${\partial \mathbb P \over \partial t} = {-\partial j \over \partial x}$? Thanks.




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

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