Teaching CSIR NET Mock Test Series Chemical Sciences Approximate Methods of Quantum Mechanics Perturbation Theory
The unperturbed energies (in eV) of a three-level system are ε0 = 2, ε1 = 4 and ε2 = 6. The matrix elements of a perturbation V (in eV) between the levels (in subscript) are V10 = 4, V20 = 6 and V12 = 10. The second-order correction to the ground state energy (in eV) in the presence of perturbation V is
1
\(-\frac{25}{4}\)
2
-67
3
-17
4
-16