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Forums
Physics
Quantum Physics
Time dependent perturbation theory
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[QUOTE="dyn, post: 5494912, member: 501581"] Hi. I have been looking at some notes for time dependent perturbation theory. The equation for the transition probability involves the matrix element < f | H | i > where f is the final state , i is the initial state and H is the perturbation switched on at t=0. If H is a constant , ie. just a number then it can be taken outside the bracket leaving H < f | i > but the final and initial states are orthonormal meaning the bracket is zero for all transitions. So a constant perturbation produces no change in state ? Have i got all this right ? If not , where am i going wrong ? Thanks [/QUOTE]
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Forums
Physics
Quantum Physics
Time dependent perturbation theory
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