Quantum-classical hypothesis tests in macroscopic matter-wave interferometry
Quantum-classical hypothesis tests in macroscopic matter-wave interferometry
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DOI：
10.1103/physrevresearch.2.033034
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发表时间：
2020-07-08
影响因子：
4.2
通讯作者：
Hornberger, Klaus
中科院分区：
文献类型：
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作者：
Schrinski, Bjorn;Nimmrichter, Stefan;Hornberger, Klaus
我们评估了迄今为止最宏观的物质波实验，通过展示重分子和冷原子系综的干涉来探测量子经典边界的程度。为此，我们考虑了一个严格的贝叶斯测试协议，用于一组参数化的量子理论假设修改，包括经过充分研究的自发坍缩模型，这些模型可以破坏叠加并恢复宏观实在性。测量事件排除的修正参数的范围量化了量子实验的宏观性，而贝叶斯更新产生的后验分布的形状揭示了数据在测试宏观实在性方面的决定性。这一方案可能为未来更接近真正宏观尺度的物质波实验的设计提供指导。
We assess the most macroscopic matter-wave experiments to date as to the extent to which they probe the quantum-classical boundary by demonstrating interference of heavy molecules and cold atomic ensembles. To this end, we consider a rigorous Bayesian test protocol for a parametrized set of hypothetical modifications of quantum theory, including well-studied spontaneous collapse models, that destroy superpositions and reinstate macrorealism. The range of modification parameters ruled out by the measurement events quantifies the macroscopicity of a quantum experiment, while the shape of the posterior distribution resulting from the Bayesian update reveals how conclusive the data are at testing macrorealism. This protocol may serve as a guide for the design of future matter-wave experiments ever closer to truly macroscopic scales.