Quantum-Optically Resolving the Number of Colloidal Quantum Dots in a Subwavelength Volume
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866908853625421824 |
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| author | Ni, Zhi-Bo Yu, Jia-Wang Li, Jiong-Zhao Cheng, Xiao-Tian Jiang, Mei-Na Song, Zi-Xuan Zhou, Xiao-Qing Fang, Wei Li, Chen-Hui Liu, Feng Lin, Xing Jin, Chao-Yuan |
| author_facet | Ni, Zhi-Bo Yu, Jia-Wang Li, Jiong-Zhao Cheng, Xiao-Tian Jiang, Mei-Na Song, Zi-Xuan Zhou, Xiao-Qing Fang, Wei Li, Chen-Hui Liu, Feng Lin, Xing Jin, Chao-Yuan |
| contents | The number resolution of solid-state artificial atoms is of fundamental interest for the study of quantum few-body systems, yet remains experimentally challenging. Quantum optical experiments offer a non-invasive approach which links up macroscopic measurements with the quantity of quantum emitters. In this work, we propose a time-domain quantum optical methodology for the strict numbering of colloidal CdSe/CdS/ZnS quantum dots (QDs) confined in subwavelength-size polystyrene capsules. The non-polarized, homogeneously broadened emission of colloidal QDs in the subwavelength volume satisfies the description of Dicke's superradiance of identical quantum emitters. An analytic relation describes the numerical dependence of the second-order photon correlation on the number and the collective lifetime of emitters, yielding an experimental counting range of colloidal QDs from one to ten. This work provides a robust pathway for the non-invasive numbering of artificial atoms and the investigation of collective light-matter interactions at the nanoscale. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_22677 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantum-Optically Resolving the Number of Colloidal Quantum Dots in a Subwavelength Volume Ni, Zhi-Bo Yu, Jia-Wang Li, Jiong-Zhao Cheng, Xiao-Tian Jiang, Mei-Na Song, Zi-Xuan Zhou, Xiao-Qing Fang, Wei Li, Chen-Hui Liu, Feng Lin, Xing Jin, Chao-Yuan Quantum Physics Optics The number resolution of solid-state artificial atoms is of fundamental interest for the study of quantum few-body systems, yet remains experimentally challenging. Quantum optical experiments offer a non-invasive approach which links up macroscopic measurements with the quantity of quantum emitters. In this work, we propose a time-domain quantum optical methodology for the strict numbering of colloidal CdSe/CdS/ZnS quantum dots (QDs) confined in subwavelength-size polystyrene capsules. The non-polarized, homogeneously broadened emission of colloidal QDs in the subwavelength volume satisfies the description of Dicke's superradiance of identical quantum emitters. An analytic relation describes the numerical dependence of the second-order photon correlation on the number and the collective lifetime of emitters, yielding an experimental counting range of colloidal QDs from one to ten. This work provides a robust pathway for the non-invasive numbering of artificial atoms and the investigation of collective light-matter interactions at the nanoscale. |
| title | Quantum-Optically Resolving the Number of Colloidal Quantum Dots in a Subwavelength Volume |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2602.22677 |