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Experimental Test of Contextuality in Quantum and Classical Systems
Aonan Zhang1,2, Huichao Xu1,2, Jie Xie1,2
1National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulation (Ministry of Education), College of Engineering and Applied Sciences and School of Physics, Nanjing University, Nanjing 210093, China.
Physical Review Letters
|April 2, 2019
Summary
Contextuality in optical fields is experimentally tested. Results show that defining measurement events is crucial for demonstrating contextuality, especially for classical fields, linking it to nonclassicality.
Area of Science:
- Quantum Information Science
- Quantum Optics
Background:
- Contextuality is a key indicator of quantum nonclassicality.
- Debates exist on whether classical fields can exhibit contextuality.
Purpose of the Study:
- To experimentally investigate contextuality in optical fields.
- To analyze the impact of measurement event definitions on nonclassical correlations.
Main Methods:
- Configured a contextuality test for optical fields.
- Utilized heralded single-photon states and classical coherent fields.
- Varied definitions of measurement events.
Main Results:
- Heralded single-photon states demonstrated contextuality.
- Contextuality in classical fields depended heavily on measurement event definitions.
- The definition of measurement events filtered nonclassical components.
Conclusions:
- The definition of measurement events is critical for demonstrating contextuality.
- Contextual correlations are linked to nonclassicality via phase-space quasiprobabilities.
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