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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.11294 |
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| _version_ | 1866917388725780480 |
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| author | Hu, Xin-Xin Maron, Gabriele Masters, Luke Rauschenbeutel, Arno Volz, Jürgen |
| author_facet | Hu, Xin-Xin Maron, Gabriele Masters, Luke Rauschenbeutel, Arno Volz, Jürgen |
| contents | Photon antibunching in resonance fluorescence - the emission from a single, resonantly driven two-level quantum emitter - is a paradigmatic signature of nonclassical light. Photon entanglement, by contrast, manifests as correlations that can defy any classical description and is typically regarded as a distinct quantum effect. Here, we experimentally extract pairs of narrowband, time-bin-entangled photons from the antibunched resonance fluorescence of a single trapped atom. We verify entanglement via violation of the CHSH Bell inequality and by reconstructing the two-photon density matrix. The observed correlations vanish when the coincidence time window exceeds the antibunching timescale, revealing underlying multimode entanglement in the emitted field. Our results establish a direct link between photon antibunching and photon-photon entanglement, unifying two canonical signatures of nonclassical light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_11294 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the Relationship Between Antibunching and Entanglement in Resonance Fluorescence Hu, Xin-Xin Maron, Gabriele Masters, Luke Rauschenbeutel, Arno Volz, Jürgen Quantum Physics Photon antibunching in resonance fluorescence - the emission from a single, resonantly driven two-level quantum emitter - is a paradigmatic signature of nonclassical light. Photon entanglement, by contrast, manifests as correlations that can defy any classical description and is typically regarded as a distinct quantum effect. Here, we experimentally extract pairs of narrowband, time-bin-entangled photons from the antibunched resonance fluorescence of a single trapped atom. We verify entanglement via violation of the CHSH Bell inequality and by reconstructing the two-photon density matrix. The observed correlations vanish when the coincidence time window exceeds the antibunching timescale, revealing underlying multimode entanglement in the emitted field. Our results establish a direct link between photon antibunching and photon-photon entanglement, unifying two canonical signatures of nonclassical light. |
| title | On the Relationship Between Antibunching and Entanglement in Resonance Fluorescence |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2504.11294 |