Quantum-classical hypothesis tests in macroscopic matter-wave interferometry

• URL: http://arxiv.org/abs/2004.03392v2
• Date: Mon, 13 Jul 2020 14:34:51 GMT
• Title: Quantum-classical hypothesis tests in macroscopic matter-wave interferometry
• Authors: Bj\"orn Schrinski, Stefan Nimmrichter, and Klaus Hornberger
• Abstract summary: We assess the most macroscopic matter-wave experiments to date by demonstrating interference of heavy molecules and cold atomic ensembles. This protocol may serve as a guide for the design of future matter-wave experiments ever closer to truly macroscopic scales.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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