QBism is one of the main candidates for an epistemic interpretation of quantum mechanics. According to QBism, the quantum state or the wavefunction represents the subjective degrees of belief of the agent assigning the state. But, although the quantum state is not part of the furniture of the world, quantum mechanics grasps the real via the Born rule which is a consistency condition for the probability assignments of the agent. In this paper, we evaluate the plausibility of recent criticism of QBism. We focus on the consequences of the subjective character of the quantum state, the issue of realism and the problem of the evolution of the quantum state in QBism. In particular, drawing upon Born’s notion of invariance as the mark of the real, it is argued that there is no essential difference between Einstein’s program of ‘the real’ and QBists’ realism. Also, it will be argued that QBism can account for the unitary evolution of the quantum state.

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QBism 并非如此简单地被驳回

QBism 是量子力学认知解释的主要候选者之一。根据 QBism，量子态或波函数表示分配状态的代理的主观信念程度。但是，虽然量子态不是世界家具的一部分，但量子力学通过玻恩规则掌握了真实，这是代理概率分配的一致性条件。在本文中，我们评估了最近对 QBism 的批评的合理性。我们关注量子态主观特征的后果、实在论问题和量子态演化问题。特别是，利用玻恩的不变性概念作为真实的标记，有人认为，爱因斯坦的“真实”计划和 QBists 的真实主义之间没有本质区别。此外，有人认为 QBism 可以解释量子态的单一演化。