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- Thread starter kalery
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So now you just need to come to grips with the fact that the kinetic energy is negative. In quantum mechanics, the kinetic energy is an operator acting on a wavefunction, and in 1D is given by [itex]-\hbar^2 \frac{d}{dx}[/itex]. If the kinetic energy is negative, it means that the wavefunction is a growing or (usually) decaying, instead of oscillating. Think of this operator acting on [tex]\psi(x) = e^{-\lambda x}[/tex], versus [tex]\psi(x) = e^{i k x}[/tex].

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What do you mean by kinetic energy is an operator acting on a wavefunction" and "wavefunction is a growing or (usually) decaying, instead of oscillating"?

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malawi_glenn

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kensaurus: Read an introductory text on quantum mechanics.

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