Question

Show that for the electron:
 

\hat{S}_x = \frac{\hbar}{2}(|\uparrow\rangle\langle\downarrow| + |\downarrow\rangle\langle\uparrow|), \quad \hat{S}_y = \frac{\hbar}{2i}(|\uparrow\rangle\langle\downarrow| - |\downarrow\rangle\langle\uparrow|).

23 Jan 2025
Answer :
Word Count : 386
We are tasked with verifying the spin operators \(\hat{S}_x\) and \(\hat{S}_y\) for an electron. The general spin operators for a spin-\(\frac{1}{2}\) particle (like the electron) are given as: \[ \hat{S}_x = \frac{\hbar}{2} \left( |\uparrow\rangle \langle \downarrow| + |\downarrow\rangle \langle \uparrow| \right) \] \[ \hat{S}_y = \frac{\hbar}{2i} \left( |\uparrow\rangle \langle \downarrow| - |\downarrow\rangle \langle \uparrow| \right) \] Let's express these in terms of matrix representations and verify their properties. ### Step 1: Basis Vectors For a spin-\(\frac{1}{2}\) system, __________ _______ __________ _________ ________ _____.
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