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I am trying to prove that the uncertainty in energy for a normalized state limits the speed at which the state can become orthogonal to itself.

The problem is number 2 on https://ocw.mit.edu/courses/physics/8-05-quantum-physics-ii-fall-2013/assignments/MIT8_05F13_ps6.pdf

Having issues with point a).

Any input is greatly appreciated.

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# I Inequality for the time evolution of an overlap

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