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"quote": "随后人们尝试取一个能够恢复无限维系统的极限。这样的极限通常是相当奇异的，会导致无限的结果，而处理这些潜在无穷大的过程被称为“[重整化(renormalization)](../../../../../concepts/quantum-field-theory/renormalization)”。以能够导致一致且物理上合理的结果的方式取这类极限的技术，通常占据标准量子场论教科书的大部分内容。对于许多理论，人们不知道有任何适当的此类技术，并且猜测也不可能存在任何此类技术。对于另一些理论，有很好的证据表明这样的极限可以被成功取到，但如何做到这一点的细节仍然未知，例如，对于杨-米尔斯规范理论的情形，为严格证明这是可能的而提供了 \\$1 百万美元的千禧年奖（此情形中的哈密顿量将在第 46 章讨论）。",
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