Author/Authors :
Kunio Funahashi، نويسنده , , Taro Kashiwa، نويسنده , , Shuji Nima، نويسنده , , Seiji Sakoda، نويسنده ,
Abstract :
The path integral for the SU(2) spin system is reconsidered. We show that the Nielsen-Rohrlich (NR) formula is equivalent to the spin coherent state expression so that the phase space in the NR formalism is not topologically nontrivial. We also perform the WKB approximation in the NR formula and find that it gives the exact result.
