论文标题
量子和现实的隐藏变量理论中信息的可检索性
Retrievability of information in quantum and realistic hidden variable theories
论文作者
论文摘要
我们提出了对大型行为的Leggett-Garg条件的概括。我们的建议依赖于通过信息可检索性来放松非侵入性测量性的假设。这与具有大分描述的隐性变量理论更加严格。至关重要的是，尽管大型现实主义的量子机械测试需要对所有可能的状态更新进行优化，但要检索信息，就可以使用基本的lüders状态更新，这在每个量子测量中都存在。我们表明，在Qubit系统中，最佳检索协议进一步涉及Busch-Lahti-Werner误差驱动不确定性关系的量子理论的基本精确限制。我们使用光子设置实施了最佳协议，并报告了对拟议的大牙概括的实验违反。
We propose a generalisation of the Leggett-Garg conditions for macrorealistic behaviour. Our proposal relies on relaxing the postulate of non-invasive measurability with that of retrievability of information. This leads to a strictly broader class of hidden variable theories than those having a macrorealistic description. Crucially, whereas quantum mechanical tests of macrorealism require one to optimise over all possible state updates, for retrievability of information it suffices to use the basic Lüders state update, which is present in every quantum measurement. We show that in qubit systems the optimal retrieving protocols further relate to the fundamental precision limit of quantum theory given by Busch-Lahti-Werner error-disturbance uncertainty relations. We implement an optimal protocol using a photonic setting, and report an experimental violation of the proposed generalisation of macrorealism.
