A Guide to Physics Problems. Part 2. Thermodynamics, Statistical Physics, and Quantum Mechanics

of any antisymmetric bound state:

Any attractive square well has a bound state which is symmetric, but the

above condition is required for the antisymmetric bound state.

5.25 Dipolar Interactions (Stony Brook)

a) We assume the magnetic moment is a vector parallel to the spin with a

moment where is a constant. Then we write the Hamiltonian

as

The second term contains only components since the vectora is along

the

b) We write

For we have so we can write

c) The addition of two angular momenta with gives values of S
which are 0 or 1:

QUANTUM MECHANICS 271