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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.

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|December 24, 2021
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Summary
This summary is machine-generated.

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.

Keywords:
channelclassicalitydecoherenceinterferenceopen system

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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.