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 a 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 int...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-06-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.L022060 |
| _version_ | 1797210440366817280 |
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| author | M. Hohn K. Barkemeyer M. von Helversen L. Bremer M. Gschrey J.-H. Schulze A. Strittmatter A. Carmele S. Rodt S. Bounouar S. Reitzenstein |
| author_facet | M. Hohn K. Barkemeyer M. von Helversen L. Bremer M. Gschrey J.-H. Schulze A. Strittmatter A. Carmele S. Rodt S. Bounouar S. Reitzenstein |
| author_sort | M. Hohn |
| collection | DOAJ |
| description | Entanglement is a major resource in advanced quantum technology where it can enable a 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±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 studies on such a system. Furthermore, our systematical investigations on the impact of driving strength indicate that dephasing mechanisms and deviations from the cascaded emission have a major impact on the degree of the measured energy-time entanglement. |
| first_indexed | 2024-04-24T10:10:38Z |
| format | Article |
| id | doaj.art-56e33dd03f024bebbdc8f7e96f794f31 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:10:38Z |
| publishDate | 2023-06-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-56e33dd03f024bebbdc8f7e96f794f312024-04-12T17:31:57ZengAmerican Physical SocietyPhysical Review Research2643-15642023-06-0152L02206010.1103/PhysRevResearch.5.L022060Energy-time entanglement from a resonantly driven quantum-dot three-level systemM. HohnK. BarkemeyerM. von HelversenL. BremerM. GschreyJ.-H. SchulzeA. StrittmatterA. CarmeleS. RodtS. BounouarS. ReitzensteinEntanglement is a major resource in advanced quantum technology where it can enable a 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±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 studies on such a system. Furthermore, our systematical investigations on the impact of driving strength indicate that dephasing mechanisms and deviations from the cascaded emission have a major impact on the degree of the measured energy-time entanglement.http://doi.org/10.1103/PhysRevResearch.5.L022060 |
| spellingShingle | M. Hohn K. Barkemeyer M. von Helversen L. Bremer M. Gschrey J.-H. Schulze A. Strittmatter A. Carmele S. Rodt S. Bounouar S. Reitzenstein Energy-time entanglement from a resonantly driven quantum-dot three-level system Physical Review Research |
| title | Energy-time entanglement from a resonantly driven quantum-dot three-level system |
| title_full | Energy-time entanglement from a resonantly driven quantum-dot three-level system |
| title_fullStr | Energy-time entanglement from a resonantly driven quantum-dot three-level system |
| title_full_unstemmed | Energy-time entanglement from a resonantly driven quantum-dot three-level system |
| title_short | Energy-time entanglement from a resonantly driven quantum-dot three-level system |
| title_sort | energy time entanglement from a resonantly driven quantum dot three level system |
| url | http://doi.org/10.1103/PhysRevResearch.5.L022060 |
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