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Measuring statistics-induced entanglement entropy with a Hong-Ou-Mandel interferometer
Gu Zhang1,2, Changki Hong3, Tomer Alkalay3
1Beijing Academy of Quantum Information Sciences, Beijing, China.
Nature Communications
|April 23, 2024
Summary
Researchers developed new methods to quantify quantum statistics-induced entanglement. These novel
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
Background:
- A universal definition for quantum entanglement is lacking, especially when combined with quantum statistics.
- Understanding entanglement's interplay with quantum statistics is crucial for quantum computation and information.
Purpose of the Study:
- To introduce novel quantitative measures for statistics-induced entanglement.
- To experimentally validate these measures using quantum Hall electron beams.
Main Methods:
- Introduced 'entanglement pointer' and 'statistics-induced entanglement entropy' motifs.
- Utilized an electronic Hong-Ou-Mandel interferometer with diluted electron beams.
- Measured auto-correlation and cross-correlation of current fluctuations.
Main Results:
- Demonstrated that the new motifs are finite only in the presence of quantum entanglement and quantum statistics.
- Showed that the motifs' forms depend on particle statistics (fermions, bosons, anyons).
- Experimentally quantified statistics-induced entanglement via the entanglement pointer and entropy.
Conclusions:
- The developed theoretical and experimental approaches enable the study of entanglement in diverse correlated systems.
- Paves the way for investigating entanglement in platforms with anyonic states.
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