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路径积分（四）-从SU(2)群诱导自旋的路径积分量子化
source link: https://zhuanlan.zhihu.com/p/25317305
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最后，我们捡起前面选择性忘记的自旋坐标。下面需要些许群论基础，书上有一个简要的复习，要点是：\[SU\left( 2 \right) = \{ g \in Mat(2 \times 2,{\mathbf{C}})|{g^\dag }g = {1_{2 \times 2}},\det g = 1\} \]…
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