- #1

- 56

- 3

## Homework Statement:

- verify that ##|s=1,m_s=0> = \frac{1}{\sqrt{2}}(| \uparrow \downarrow> + |\downarrow \uparrow >## is an eigenstate of ##\hat{S^2}##

## Relevant Equations:

- (Drop hats) $$S^2 = S_1^2 + S_2^2 + 2S_{1z}S_{2z} + S_{1+}S_{2-}+S_{1-}S_{2+}$$

I simply use the equation above, and the eigenvalus whish yield:

##\hbar^2 [ s_1(s_1+1) + s_2(s_2+1) + m_1m_2 + \sqrt{s_1(s_1+1) - m_1(m_1+1)}\sqrt{s_2(s_2+1) - m_2(m_2-1)} + \sqrt{s_2(s_2+1) - m_2(m_2+1)}\sqrt{s_1(s_1+1) - m_1(m_1-1)}##

Very straight forward. My issue is that I don't know what ##s_i## and ##m_i## for i=1,2 is? I only have "s" and "m" from the definition in the question.

I recently had the same problem in an exercise but with angular momentum. Please bring me some clarity on this, thanks so much in advance!

##\hbar^2 [ s_1(s_1+1) + s_2(s_2+1) + m_1m_2 + \sqrt{s_1(s_1+1) - m_1(m_1+1)}\sqrt{s_2(s_2+1) - m_2(m_2-1)} + \sqrt{s_2(s_2+1) - m_2(m_2+1)}\sqrt{s_1(s_1+1) - m_1(m_1-1)}##

Very straight forward. My issue is that I don't know what ##s_i## and ##m_i## for i=1,2 is? I only have "s" and "m" from the definition in the question.

I recently had the same problem in an exercise but with angular momentum. Please bring me some clarity on this, thanks so much in advance!