Recent content by lemma

Hi there, I need to solve the problem for 3 spins (find the Hamiltonian), and I am really not certain about how to construct it. It is meant to be a 8x8 matrix, and is defined as H=〖J(S〗_1 S_2+S_2 S_3+S_3 S_1). Any help or hint would be most appreciated. Thanks in advance, - lemma

with a little help from http://quantummechanics.ucsd.edu/ph130a/130_notes/node326.html your answer was helpful. thank you very much!

Hi there, I would be most grateful if someone would explain how do we calculate the spin function χ(s_1,s_2 )=1/√2 [α(s_1 )β(s_2 )±α(s_2 )β(s_1 )] both the symmetric and antisymmetric α(s_1 )β(s_2 )+α(s_2 )β(s_1 ) = ? α(s_1 )β(s_2 )-α(s_2 )β(s_1 ) = ? knowing that α( + 1 / 2) = β(...