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arXiv quant-ph/9611002quant-ph
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从量子到经典:量子态扩散模型

From Quantum to Classical: the Quantum State Diffusion Model

Nicolas Gisin, Todd A. Brun, Marco Rigo

摘要:

量子力学是非定域的。经典力学是局部的。因此,经典力学不能解释所有的量子现象。相反,用量子力学来描述经典现象是很麻烦的。不仅计算更加复杂,而且--这是主要的一点--在概念上也更加困难:人们必须论证,当跨越“量子$\rightarrow$经典”边界时,非定域性、纠缠和叠加原理可以被搁置一边。显然,非定域性、纠缠和叠加原理在经典极限下应该变得无关紧要。但为什么要争论呢?不是应该直接从方程式里算出来吗?它是从方程式里出来的吗?这篇文章是关于最后一个问题的。答案是:“这取决于哪一个等式”。

英文摘要:

Quantum mechanics is nonlocal. Classical mechanics is local. Consequently classical mechanics can not explain all quantum phenomena. Conversely, it is cumbersome to use quantum mechanics to describe classical phenomena. Not only are the computations more complex, but - and this is the main point - it is conceptually more difficult: one has to argue that nonlocality, entanglement and the principle of superposition can be set aside when crossing the "quantum $\rightarrow$ classical" border. Clearly, nonlocality, entanglement and the principle of superposition should become irrelevant in the classical limit. But why should one argue? Shouldn't it just come out of the equations? Does it come out of the equations? This contribution is about the last question. And the answer is: "it depends on which equation".

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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