Energy-time entanglement from a resonantly driven quantum dot three-level system
Entanglement is a major resource in advanced quantum technology, where it can enable secure exchange of information over large distances. Energy-time entanglement is particularly attractive for its beneficial robustness in fiber-based quantum communication and can be demonstrated in the Franson inte...
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| Veröffentlicht in: | arXiv.org 2023-04 |
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| creator | Hohn, M Barkemeyer, K M von Helversen Bremer, L Gschrey, M J -H Schulze Strittmatter, A Carmele, A Rodt, S Bounouar, S Reitzenstein, S |
| description | Entanglement is a major resource in advanced quantum technology, where it can enable secure exchange of information over large distances. Energy-time entanglement is particularly attractive for its beneficial robustness in fiber-based quantum communication and can be demonstrated in the Franson interferometer. We report on Franson-type interference from a resonantly driven biexciton cascade under continuous wave excitation. Our measurements yield a maximum visibility of (73 \(\pm\) 2)% surpassing the limit of violation of Bell's inequality (70.7%) by more than one standard deviation. Despite being unable to satisfy a loophole free violation, our work demonstrates promising results concerning future works on such a system. Furthermore, our systematical studies on the impact of driving strength indicate that dephasing mechanisms and deviations from the cascaded emission have major impact on the degree of the measured energy-time entanglement. |
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| subjects | Bell's inequality Continuous radiation Quantum dots Time measurement Visibility Wave excitation |
| title | Energy-time entanglement from a resonantly driven quantum dot three-level system |
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