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Optical experiment to test negative probability in context of quantum-measurement selection

Title
Optical experiment to test negative probability in context of quantum-measurement selection
Author
이광걸
Keywords
TOMOGRAPHY; INEQUALITY; VIOLATION
Issue Date
2019-12
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 9, article no. 19021
Abstract
Negative probability values have been widely employed as an indicator of the nonclassicality of quantum systems. Known as a quasiprobability distribution, they are regarded as a useful tool that provides significant insight into the underlying fundamentals of quantum theory when compared to the classical statistics. However, in this approach, an operational interpretation of these negative values with respect to the definition of probability-the relative frequency of occurred event-is missing. An alternative approach is therefore considered where the quasiprobability operationally reveals the negativity of measured quantities. We here present an experimental realization of the operational quasiprobability, which consists of sequential measurements in time. To this end, we implement two sets of polarization measurements of single photons. We find that the measured negativity can be interpreted in the context of selecting measurements, and it reflects the nonclassical nature of photons. Our results suggest a new operational way to unravel the nonclassicality of photons in the context of measurement selection.
URI
https://www.nature.com/articles/s41598-019-53121-5https://repository.hanyang.ac.kr/handle/20.500.11754/155448
ISSN
2045-2322
DOI
10.1038/s41598-019-53121-5
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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