# Diatomic Hydrogen Molecule

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1. Nov 16, 2017

### avkr

1. The problem statement, all variables and given/known data
Consider an $H_2$ molecule where the protons are separated by a wide
distance R and both are located on the z-axis. Ignoring the spin degrees
of freedom and treating the dipole-dipole interaction as a perturbation,
use perturbation theory to estimate an upper limit for the ground state
energy of this molecule.

2. Relevant equations

3. The attempt at a solution
What I think is that since hydrogen molecule has 0 dipole moment there should be no perturbation to calculate.

2. Nov 16, 2017

### vela

Staff Emeritus
The problem is asking you about the interaction between the two atoms that make up the molecule: how does one atom affect the other through a dipole-dipole interaction?