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First order peturbation theory.

  • Thread starter wgdtelr
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  • #1
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Homework Statement


A particle of mass m and spin 1/2 is moving in an infinite, symmetric potential well
V (x) = { 0 -L<= x <= L.
= ∞ otherwise..

Under the effect of a weak external magnetic field.
B = -B k^ ; -L <= x <= 0
= -B i^ 0 <= x <= L.
where i^ and k^ are the unit vectors along the Ox and Oz directions. Calculate, in the first order of perturbation theory, the energy of the nth exited state of the partic



The Attempt at a Solution



give me some hints to start this problem.
 

Answers and Replies

  • #2
Born2bwire
Science Advisor
Gold Member
1,779
18
The energy calculation is fairly straightforward, do you know what the relevant equation is? As for the process, you need to first define what the perturbed Hamiltonian is and the unperturbed eigenstates are.
 

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