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Homework Help: Energy eigenstates in non-symmetric potential

  1. Apr 4, 2015 #1


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    1. The problem statement, all variables and given/known data
    A potential has V(x)=2V0 for x<0 , V(x)=0 for 0<x<a and V(x)=V0 for x.>a with V0>0. The next 3 questions apply to this potential.

    1 - there are 2 energy eigenstates for each energy E>V0 but smaller than 2V0 True or false ?
    2 - there is one normalizable state for each E>0 but smaller than V0 T or F ?
    3 - there are no energy eigenstates for E<0 T or F ?

    The recommended time to spend on these 3 questions is 5 minutes in total !

    2. Relevant equations

    schrodingers time independent equation
    3. The attempt at a solution
    I can look at the 3 regions and solve for the wavefunction. For Q1 I get an exponential decay for x<0 and oscillating functions for the other 2 regions. I could then apply continuity of the wavefunction and its derivative at the boundaries but I only have 5mins for all 3 questions. there must be a quick way. any ideas ? Thanks
  2. jcsd
  3. Apr 6, 2015 #2


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    For Q1, I'd guess it's false. If there were two energy eigenstates, what would be the difference between them? For a free particle, you have the freedom to choose the direction of the momentum. You don't seem to have that here.
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