Woit · §1.2 Basic principles of quantum mechanics
英文原文
This range describes the dimensionless energy-time scale and the ℏ→0 limit; it is discussion, not a theorem.
原文相关讨论摘录
It is sometimes convenient however to carry along factors of , since this can help make clear which terms correspond to classical physics behavior, and which ones are purely quantum mechanical in nature. Typically classical physics comes about in the limit where
is large. This is true for the energy and time scales encountered in everyday life, but it can also always be achieved by taking , and this is what will often be referred to as the “classical limit”. One should keep in mind though that the manner in which classical behavior emerges out of quantum theory in such a limit can be a very complicated phenomenon.
来源与版本
正文:英文原文
来源版本:2025-10-20
原文位置:§1.2;PDF 页 21;印刷页 4
处理记录:PDF 文字层提取;MinerU OCR;AI 辅助转录对照
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来源 PDF SHA-256:5a1941b2443b54d5db3d055f1e5ba390429b7a728475258017aaac87ee85a837
中文译文
本段作为原文相关讨论登记;中文为待校对机器译稿。
译文摘录
然而,有时保留 的因子是方便的,因为这有助于明确哪些项对应于经典物理行为,哪些项在本质上是纯量子力学的。通常,经典物理出现在这样的极限下:
是大的。对于日常生活中遇到的能量和时间尺度而言,这是成立的,但也可以通过取 来始终实现这一点,而这通常被称为“经典极限”。不过应当牢记,在这种极限下,经典行为从量子理论中涌现的方式可能是一种非常复杂的现象。
来源与版本
正文:中文译文
来源版本:2025-10-20
原文位置:§1.2;PDF 页 21;印刷页 4
处理记录:machine-translation/deepseek-v4.1-flash
核对状态:机器译稿 · 待校对