关系量子力学、量子相对主义与相对性的迭代
Relational Quantum Mechanics, Quantum Relativism, and the Iteration of Relativity
AI总结：
本文以关系量子力学为案例，探讨量子相对主义中被忽视的相对性迭代问题，指出关系量子力学承诺无限制迭代原则，该原则虽能保障交互结果的可交流性与一致性，但与关系量子力学的保守解读不兼容，需采用视角事实概念，并反思了相关研究现状与发展方向。
摘要：
量子系统的动力学性质总是相对于其他系统而言的观点最近重新流行起来。本文以关系量子力学（RQM）为案例研究，呼吁关注在关于量子相对主义的辩论中一直未被充分重视的一个问题：相对性是否迭代。关于一个系统相对于特定参考所拥有的性质，是否存在绝对事实，或者这又是一个相对的问题，以此类推？本文论证了RQM（以其最著名的形式）承诺了我所称的无限制迭代原则（UIP），从而承诺了相对化的无限回归。该原则在确保交互结果在不同观察者之间的可交流性与一致性方面发挥着关键作用。然而，本文表明它与以关系术语对RQM的广泛保守解读不兼容，而是需要采用更为非正统的视角事实概念。最后，我对视角主义版本的RQM及更广泛的量子相对主义的当前研究现状进行了反思，强调了进一步概念发展的必要性，以及迭代原则对此类解释的准确成本效益分析的重要性。
英文摘要：
The idea that the dynamical properties of quantum systems are invariably relative to other systems has recently regained currency. Using Relational Quantum Mechanics (RQM) for a case study, this paper calls attention to a question that has been underappreciated in the debate about quantum relativism: the question of whether relativity iterates. Are there absolute facts about the properties one system possesses relative to a specified reference, or is this again a relative matter, and so on? It is argued that RQM (in its best-known form) is committed to what I call the Unrestricted Iteration Principle (UIP), and thus to an infinite regress of relativisations. This principle plays a crucial role in ensuring the communicability and coherence of interaction outcomes across observers. It is, however, shown to be incompatible with the widespread, conservative reading of RQM in terms of relations, instead necessitating the adoption of the more unorthodox notion of perspectival facts. I conclude with some reflections on the current state of play in perspectivist versions of RQM and quantum relativism more generally, underscoring both the need for further conceptual development and the importance of the iteration principle for an accurate cost-benefit analysis of such interpretations.
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