Quantum light sources with configurable lifetime leveraging parity-time symmetry
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909561324044288 |
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| author | Chen, Nuo Li, Wen-Xiu Fan, Yun-Ru Li, Hang-Hang Zeng, Hong Chi, Wu-Qiang Zhou, Heng Li, Hao You, Li-Xing Guo, Guang-Can Zhou, Qiang Xu, Jing Zhang, Xin-Liang |
| author_facet | Chen, Nuo Li, Wen-Xiu Fan, Yun-Ru Li, Hang-Hang Zeng, Hong Chi, Wu-Qiang Zhou, Heng Li, Hao You, Li-Xing Guo, Guang-Can Zhou, Qiang Xu, Jing Zhang, Xin-Liang |
| contents | Quantum light sources with configurable photon lifetimes are essential for large-scale quantum circuits, enabling applications in programmable quantum computing, various quantum key distribution protocols, and quantum tomography techniques. However, the fundamental trade-off between efficiency and photon lifetime imposes significant challenges on the design of high-performance large configurable lifetime quantum light sources. Here, we report on such chip-scale quantum light sources by harnessing the unique feature of parity-time (PT) symmetry. The core design centers on employing PT-symmetric coupling between two microresonators of distinct circumferences, enabling broad-range and selective tuning of intracavity photon density of states. By controlling the alignment between resonators, we achieved a 38-fold photon lifetime tuning range (4 ~ 158 ps), with the shortest lifetimes near the exceptional points of the PT-symmetric systems. The device generates energy-time entangled photon pairs with 87.1 +- 1.1% interference visibility and a heralded second-order autocorrelation of g_h^((2) ) (0)= 0.069 +- 0.001. Our work highlights the potential of PT symmetry for advanced quantum applications, including high-speed communication and programmable quantum computing, quantum coherent tomography, and beyond. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_01413 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum light sources with configurable lifetime leveraging parity-time symmetry Chen, Nuo Li, Wen-Xiu Fan, Yun-Ru Li, Hang-Hang Zeng, Hong Chi, Wu-Qiang Zhou, Heng Li, Hao You, Li-Xing Guo, Guang-Can Zhou, Qiang Xu, Jing Zhang, Xin-Liang Quantum Physics Optics Quantum light sources with configurable photon lifetimes are essential for large-scale quantum circuits, enabling applications in programmable quantum computing, various quantum key distribution protocols, and quantum tomography techniques. However, the fundamental trade-off between efficiency and photon lifetime imposes significant challenges on the design of high-performance large configurable lifetime quantum light sources. Here, we report on such chip-scale quantum light sources by harnessing the unique feature of parity-time (PT) symmetry. The core design centers on employing PT-symmetric coupling between two microresonators of distinct circumferences, enabling broad-range and selective tuning of intracavity photon density of states. By controlling the alignment between resonators, we achieved a 38-fold photon lifetime tuning range (4 ~ 158 ps), with the shortest lifetimes near the exceptional points of the PT-symmetric systems. The device generates energy-time entangled photon pairs with 87.1 +- 1.1% interference visibility and a heralded second-order autocorrelation of g_h^((2) ) (0)= 0.069 +- 0.001. Our work highlights the potential of PT symmetry for advanced quantum applications, including high-speed communication and programmable quantum computing, quantum coherent tomography, and beyond. |
| title | Quantum light sources with configurable lifetime leveraging parity-time symmetry |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2504.01413 |