Woit · §1.2 Basic principles of quantum mechanics
英文原文
This is Woit’s discussion of interaction between a measured system and a macroscopic apparatus.
原文相关讨论摘录
The above axioms characterize the mathematical structure of a quantum theory, but they don’t address the “measurement problem”. This is the question of how to apply this structure to a physical system interacting with some sort of macroscopic, human-scale experimental apparatus that “measures” what is going on. This is a highly thorny issue, requiring in principle the study of two interacting quantum systems (the one being measured, and the measurement apparatus) in an overall state that is not just the product of the two states, but is highly “entangled” (for the meaning of this term, see chapter 9). Since a macroscopic apparatus will involve something like degrees of freedom, this question is extremely hard to analyze purely within the quantum mechanical framework (requiring for instance the solution of a Schrödinger equation in variables).
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、22;印刷页 4、5
处理记录:PDF 文字层提取;MinerU OCR;AI 辅助转录对照
核对状态:AI 辅助转录核对,未作人工审阅或数学审稿
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
上述公理刻画了量子理论的数学结构,但它们并未涉及“测量问题”。这个问题是:如何将此结构应用于一个与某种宏观的、人类尺度的实验装置相互作用的物理系统,该装置“测量”正在发生的情况。这是一个极为棘手的问题,原则上需要研究两个相互作用的量子系统(被测量的系统与测量装置),其整体状态不仅仅是两个状态的乘积,而是高度“纠缠”的(关于此术语的含义,见第9章)。由于宏观装置会涉及诸如个自由度,这个问题极难完全在量子力学框架内分析(例如需要在个变量中求解薛定谔方程)。
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、22;印刷页 4、5
处理记录:machine-translation/deepseek-v4.1-flash
核对状态:机器译稿 · 待校对