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Quantifying Decoherence via Increases in Classicality
Shuangshuang Fu1, Shunlong Luo2,3
1School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China.
Entropy (Basel, Switzerland)
|December 24, 2021
Summary
This study quantifies decoherence, a key process in quantum mechanics, using new information-theoretic measures. It explores how quantum systems lose their unique properties to the environment, impacting the quantum-to-classical transition.
Area of Science:
- Quantum Mechanics
- Quantum Information Theory
Background:
- Decoherence arises from the interaction of quantum systems with their environment, leading to information loss.
- It is crucial for understanding the quantum-to-classical transition and is often studied through system-environment correlations.
- Quantum Darwinism explains the emergence of classical reality from quantum substrates via information proliferation.
Purpose of the Study:
- To introduce novel quantifiers of classicality based on the Jordan product and uncertainty.
- To quantify decoherence using an information-theoretic approach.
- To investigate the influence of quantum systems on their environment.
Main Methods:
- Development of two new quantifiers for classicality.
- Application of these quantifiers to measure decoherence.
- Information-theoretic analysis of system-environment interactions.
Main Results:
- Successful quantification of decoherence using the proposed information-theoretic measures.
- Insights into the role of system-environment interactions in decoherence.
- Characterization of classicality through new metrics.
Conclusions:
- The introduced quantifiers provide a new perspective on decoherence and classicality.
- Information-theoretic approaches are valuable for studying open quantum systems.
- Further research can explore these quantifiers in various quantum phenomena.
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