Problem 4.53 Work out the spin matrices for arbitrary spin s, generalizing spin (1)/(2) (Equations 4.145 and 4.147), spin 1 (Problem 4.31), and spin 3/2 (Problem 4.52).
Answer:
S_(z)=ā([s,0,0,...,0
0,s-1,0,...,0
0,0,s-2,...,0
..., ..., ..., ..., ...
0,0,0,...,-s])
S_(x)=(ā)/(2)([0,b_(s),0,0,...,0,0
b_(s),0,b_(s-1),0,...,0,0
0,b_(s-1),0,b_(s-2),...,0,0
0,0,b_(s-2),0,...,0,0
..., ..., ..., ..., ..., ..., ...
0,0,0,0,...,0,b_(-s+1)
0,0,0,0,...,b_(-s+1),0])
S_(y)=(ā)/(2)([0,-ib_(s),0,0,...,0,0
ib_(s),0,-ib_(s-1),0,...,0,0
0,ib_(s-1),0,-ib_(s-2),...,0,0
0,0,ib_(s-2),0,...,0,0
..., ..., ..., ..., ..., ..., ...
0,0,0,0,...,0,-ib_(-s+1)
0,0,0,0,...,ib_(-s+1),0])
where
b_(j)=ā((s+j)(s+1-j)).
Book: Introduction to Quantum Mechanics 2nd Edition (Griffiths)