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Updated: Feb 13, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Generation of a non-zero discord bipartite state with classical second-order interference
Optics Express
|March 10, 2018
Summary
We demonstrate generating quantum discord using classical interference. This study shows a quantum discord of D = 0.311 theoretically and D = 0.197 experimentally, offering insights into quantum discord's nature.
Area of Science:
- Quantum Information Science
- Quantum Optics
- Quantum Foundations
Background:
- Quantum discord quantifies quantum correlations beyond classical entanglement.
- Classical second-order interference is a phenomenon typically explained by classical physics.
- Understanding the interplay between classical phenomena and quantum correlations is crucial for quantum information processing.
Purpose of the Study:
- To investigate the generation of quantum discord through classical second-order interference.
- To theoretically and experimentally verify the creation of quantum discord in this context.
- To explore the relationship between nonclassicality from different perspectives and its implications for quantum discord.
Main Methods:
- Theoretical modeling of bipartite states generated via classical second-order interference.
- Experimental implementation of classical second-order interference to produce quantum states.
- Quantification of quantum discord for both theoretical and experimental states.
Main Results:
- Theoretical prediction of generating a bipartite state with quantum discord D = 0.311.
- Experimental verification yielding a non-zero quantum discord of D = 0.197 ± 0.060.
- Demonstration that nonclassicality arises differently from physical and information-theoretic viewpoints.
Conclusions:
- Quantum discord can be generated using classical second-order interference.
- Experimental results align with theoretical predictions, confirming the phenomenon.
- The study provides valuable insights into the fundamental nature of quantum discord and nonclassicality.
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