Dialogue concerning two views on quantum coherence: Factist and fictionist
Dialogue concerning two views on quantum coherence: Factist and fictionist
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DOI：
10.1142/s0219749906001591
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发表时间：
2006-02-01
影响因子：
1.2
通讯作者：
Spekkens, RW
中科院分区：
文献类型：
--
作者：
Bartlett, SD;Rudolph, T;Spekkens, RW
在不同的背景下多次出现的一个争论是，某些量的本征态之间的量子相干性是事实还是虚构。我们提出了一个教学介绍辩论的形式，从两个阵营的支持者之间的假设对话：一个事实主义者和一个虚构的。我们认为，通过认识到量子态不仅包含关于系统的内在属性的信息，而且还包含关于其外在属性的信息，即关于其与外部其他系统的关系，可以解决争论。具体地说，factist的相干量子态是系统与一个参考系的关系的适当描述，而小说家的非相干量子态则是对系统与另一个不相关的参照系之间关系的恰当描述。我们的结论是，这两种观点是可供选择但同样有效的描述范式。
A controversy that has arisen many times over in disparate contexts is whether quantum coherences between eigenstates of certain quantities are fact or fiction. We present a pedagogical introduction to the debate in the form of a hypothetical dialogue between proponents from each of the two camps: a factist and a fictionist. A resolution of the debate can be achieved, we argue, by recognizing that quantum states do not only contain information about the intrinsic properties of a system but about its extrinsic properties as well, that is, about its relation to other systems external to it. Specifically, the coherent quantum state of the factist is the appropriate description of the relation of the system to one reference frame, while the incoherent quantum state of the fictionist is the appropriate description of the relation of the system to another, uncorrelated, reference frame. The two views, we conclude, are alternative but equally valid paradigms of description.