(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

We consider an hydrogen atom in its fundamental state. At t=0, we apply an electric field in the z direction,

[tex]\mathcal{E}(t)=\mathcal{E}_0e^{-t/\tau}[/tex]

What is the probability that the atom be in the state 2p at [tex]t>>\tau[/tex]?

3. The attempt at a solution

I thought time dependant perturbation theory failed for large time.... So what is going on here?

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# Quantum time dependant perturbation HW

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