Lowest energy state with infinite and finite potential

  • Thread starter omiros
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  • #1
omiros
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Hello everyone and thanks for reading my post.

I have a problem with an electron, which actually is confined into a region 0 ≤ x≤ L with infinite potential around it, and its energy in the ground state is 0.38eV. Then on the x > L region the potential is 5eV and the energy of the lowest eigenstate is 0.32eV. What causes that difference?

Thanks for your time.
 

Answers and Replies

  • #2
36,104
13,038
The different potential causes a difference.

In the second case, the wavefunction will extend a bit into the x>L-region. This is similar to a larger potential well, so the ground state has a lower energy.
 
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  • #3
ibgumel
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I think the difference happen as a result of the TUNNELLING of the electron into the potential barrier.
 

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