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arXiv quant-ph/9711009quant-ph
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代数量子力学中的Beables

Beables in Algebraic Quantum Mechanics

Rob Clifton

摘要:

约翰·贝尔曾经提出,人们应该从量子理论的“可观测量”中选择出一些“可观测量”的子集,这些子集可以被一致地归为确定值。此外,这个子集应该被选择,以保证(除其他事项外),我们可以免除正统解释的松散谈论'测量值':“......将计算一个比特是特定值的概率,就像以前计算观察到该值的概率一样”。在C*-代数(特别是Segal代数)的框架下工作,我提出了一个量子系统的有界可观测量的子集的代数特征,这些子集可以相对于系统的任何(固定)状态具有beable状态。事实证明,在一个状态中具有可交换状态的可观测量不需要都是可交换的(贝尔自己并没有考虑这种可能性),但它们至少必须形成由状态决定的某种“拟可交换”子代数。分析的一个优点是它适用于连续谱的beable,通常在无隐变量定理的讨论中被忽略。在(非常)特殊的情况下,一个系统的可观的代数是representable在有限维希尔伯特空间,我给一个完整的表征系统的任何状态所确定的最大beable子代数;无限维的情况下仍然开放。这些结果进行了讨论,以前的结果类似的性质,“非崩溃”的解释量子力学,代数相对论量子场论。

英文摘要:

John Bell once argued that one ought to select, out of the 'observables' of quantum theory, some subset of 'beables' that can be consistently ascribed determinate values. Moreover, this subset should be selected so as to guarantee (among other things) that we can dispense with the orthodox interpretation's loose talk about 'measurement values': "...the probability of a beable being a particular value would be calculated just as was formerly calculated the probability of observing that value". Working in the framework of C*-algebras (in particular, Segal algebras), I propose an algebraic characterization of those subsets of bounded observables of a quantum system that can have beable status with respect to any (fixed) state of the system. It turns out that observables with beable status in a state need not all commute (a possibility Bell himself does not consider), but they must at least form a certain kind of 'quasicommutative' subalgebra determined by the state. A virtue of the analysis is that it applies to beables with continuous spectra, usually neglected in discussions of the no-hidden-variables theorems. In the (very) special case where the algebra of observables for a system is representable on a finite-dimensional Hilbert space, I give a complete characterization of the maximal beable subalgebras determined by any state of the system; the infinite-dimensional case remains open. These results are discussed in relation to previous results of a similar nature, to 'no-collapse' interpretations of quantum mechanics, and to algebraic relativistic quantum field theory.

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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