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arXiv math-ph/0601011math-phmath.MPmath.OAquant-ph
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观测量III:经典观测量

Observables III: Classical Observables

Hans F. de Groote

摘要:

在我们关于观测量的工作的第二部分中,我们证明了冯诺依曼意义下的量子观测量,即$L(H)$的某些冯诺依曼子代数$R$中的有界自伴算子,可以表示为$R$的Stone谱$Q(R)$上的有界连续函数。此外,我们还证明了这种表示是线性的当且仅当$R$是阿贝尔的,并且在这种情况下,它与$R$的Gelfand变换一致。在这一部分中,我们讨论了经典的可观量,即可测和连续的功能,在相同的角度。我们得到的结果是非常相似的量子情况下,从而显示了量子和经典的观测量的共同结构特征。

英文摘要:

In the second part of our work on observables we have shown that quantum observables in the sense of von Neumann, i.e.bounded selfadjoint operators in some von Neumann subalgebra $R$ of $L(H)$, can be represented as bounded continuous functions on the Stone spectrum $Q(R)$ of $R$. Moreover, we have shown that this representation is linear if and only if $R$ is abelian, and that in this case it coincides with the Gelfand transformation of $R$. In this part we discuss classical observables, i.e. measurable and continuous functions, under the same point of view. We obtain results that are quite similar to the quantum case, thus showing up the common structural features of quantum and classical observables.

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