- A hydrogen atom is placed in an electric field
which is uniform in space and turns on at
then decays exponentially.
That is, for and
for .
What is the probability that, as
, the
hydrogen atom has made a transition to the state?
- A one dimensional harmonic oscillator is in its ground state.
It is subjected to the additional potential for a
a time interval .
Calculate the probability to make a transition to the first
excited state (in first order).
Now calculate the probability to make a transition to the second
excited state. You will need to calculate to second order.

Jim Branson 2013-04-22