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Spatio-Temporal Steering for Testing Nonclassical Correlations in Quantum Networks
Shin-Liang Chen1,2, Neill Lambert3, Che-Ming Li4
1Department of Physics, National Cheng Kung University, 701, Tainan, Taiwan.
Scientific Reports
|June 18, 2017
Summary
We introduce spatio-temporal steering (STS) to measure nonclassical correlations in quantum networks. This new method, with STS weight and robustness measures, is applied to biological systems like photosynthesis.
Area of Science:
- Quantum Information Science
- Quantum Biology
- Condensed Matter Physics
Background:
- Quantum correlations are crucial for quantum information processing and understanding complex systems.
- Existing measures like Einstein-Podolsky-Rosen steering and temporal steering capture specific quantum correlations.
- Open quantum systems, such as biological networks, present unique challenges for characterizing nonclassical correlations.
Purpose of the Study:
- Introduce the novel concept of spatio-temporal steering (STS) as a unified framework for quantifying nonclassical correlations.
- Define quantitative measures for STS: STS weight and robustness.
- Demonstrate the applicability of STS in assessing nonclassical correlations within open quantum networks, including biological systems.
Main Methods:
- Developed the theoretical framework for spatio-temporal steering (STS).
- Defined two key metrics: STS weight and STS robustness.
- Applied STS to analyze quantum correlations in the Fenna-Matthews-Olson model of a photosynthetic pigment-protein complex.
Main Results:
- STS generalizes existing steering concepts (Einstein-Podolsky-Rosen and temporal steering).
- The STS weight and robustness provide quantifiable measures of nonclassical correlations.
- STS successfully identified nonclassical correlations in the photosynthetic energy transfer model.
Conclusions:
- Spatio-temporal steering offers a powerful new tool for characterizing nonclassical correlations in open quantum systems.
- STS measures are valuable for analyzing quantum transport in nano-structures and excitation transfer in biological systems.
- The application to the Fenna-Matthews-Olson model highlights STS's potential in quantum biology research.
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