- #1
supernano
- 6
- 0
I've calculated the eigenstates of the Hubbard Hamiltonian for two fermions.
The ground state is (U2 - (U2 + 16t2)1/2)/2
For U = infty, I get 0.
For U >> t, I should get the exchange energy J = -4t2/U
How do I get from the ground state equation to J?
The ground state is (U2 - (U2 + 16t2)1/2)/2
For U = infty, I get 0.
For U >> t, I should get the exchange energy J = -4t2/U
How do I get from the ground state equation to J?