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Crude Probability calculation for tunneling

  1. Apr 27, 2014 #1
    Say I have a potential barrier that is 4eV higher then an electrons energy and 5x10^-11 wide. Just by considering the change in amplitude of the wave function from the entry into the barrier vs the exit I am asked to make a rough approximation for the probability of tunnelling. I get the amplitude at entry is 1 and exit is 0.00594. Now is 0.00594 a good approximation for the probability of tunnelling or would I need to do anything else to do it.

    This isn't homework it's practice for an exam which I have tomorow
  2. jcsd
  3. Apr 27, 2014 #2
    Recall that you need to square amplitudes to get probabilities.
  4. Apr 27, 2014 #3


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    Staff: Mentor

    It might also help if you tell us how you calculated the amplitude at exit so we can check your procedure.
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