论文标题
从Wigner泡沫中的景色
The view from a Wigner bubble
论文作者
论文摘要
在最近的无关理论中[Bong等人的自然物理学(2020)]中,我们证明了对扩展的Wigner朋友场景的单位量子力学的预测与任何满足三个代代相理的假设的理论不相容,我们称之为“友好性”的结合,未经观察事件,无处不在的事件,无处不在的事件和友善。从实验形而上学的角度来看,在本文(基于2019年Vaxjo会议上的QBISM禧年的邀请演讲)中,我讨论了该定理对QBISM的含义。我认为,QBISM与对量子力学的现实主义解释之间的关键区别是从遵守不同真理理论的遵守来理解的:实用主义者与对应理论。我认为,解决实用主义观点中解决测量问题的有效途径涉及认真对待量子投注剂的观点,甚至是我所谓的“ Wigner Bubble”的观点。我提出,QBISM提供的现实概念将与对所有理性代理具有务实价值的任何理论的不变元素相对应,即在代理观点的变化时不变的元素。即使某些代理人观察到这些事件,“事件”的经典概念也不是这些不变的概念。量子状态都不是。然而,我认为,量子状态的个人主义观点远非孤独主义,这是其确切相反的一种表达:哥白尼主义。
In a recent no-go theorem [Bong et al, Nature Physics (2020)], we proved that the predictions of unitary quantum mechanics for an extended Wigner's friend scenario are incompatible with any theory satisfying three metaphysical assumptions, the conjunction of which we call "Local Friendliness": Absoluteness of Observed Events, Locality and No-Superdeterminism. In this paper (based on an invited talk for the QBism jubilee at the 2019 Vaxjo conference) I discuss the implications of this theorem for QBism, as seen from the perspective of experimental metaphysics. I argue that the key distinction between QBism and realist interpretations of quantum mechanics is best understood in terms of their adherence to different theories of truth: the pragmatist versus the correspondence theories. I argue that a productive pathway to resolve the measurement problem within a pragmatist view involves taking seriously the perspective of quantum betting agents, even those in what I call a "Wigner bubble". The notion of reality afforded by QBism, I propose, will correspond to the invariant elements of any theory that has pragmatic value to all rational agents -- that is, the elements that are invariant upon changes of agent perspectives. The classical notion of `event' is not among those invariants, even when those events are observed by some agent. Neither are quantum states. Nevertheless, I argue that far from solipsism, a personalist view of quantum states is an expression of its precise opposite: Copernicanism.