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        "quote": "由[方程 (6.5)](../chapter-06/02-spin-groups-in-three-and-four-dimensions#equation-6-5)及其中向量与 $2\\times2$ 矩阵的对应关系可知，[<u class=\"concept-term\" data-concept-reference=\"concepts/quantum-mechanics/spin\" data-concept-identity=\"urn:uuid:f9e4f49c-fba8-4cc3-8560-b5dadb3c85b2\" data-concept-route=\"/concept-identities#concept-f9e4f49c-fba8-4cc3-8560-b5dadb3c85b2\" id=\"first-3cf3a62fadfcf8c4f252-zh\">自旋(spin)向量可观测量</u>](../../../../../concepts/quantum-mechanics/spin)在海森堡绘景中绕磁场向量 $\\mathbf{B}$ 旋转，角速度为 $\\frac{ge|\\mathbf{B}|}{2mc}$。",
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