Collective early-time spontaneous decay of a strongly driven cold atomic ensemble
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908668917710848 |
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| author | Orenes, Daniel Benedicto Matias, Naudson Lucas Lopes Apoorva, Apoorva Glicenstein, Antoine Saint-Jalm, Raphaël Kaiser, Robin |
| author_facet | Orenes, Daniel Benedicto Matias, Naudson Lucas Lopes Apoorva, Apoorva Glicenstein, Antoine Saint-Jalm, Raphaël Kaiser, Robin |
| contents | In this work we present a numerical and experimental investigation of the collective early-time decay rates of a strongly driven and optically dense cold atomic cloud. We prepare the atomic ensemble by driving the system to its steady state with varying Rabi frequencies $Ω$ that go from the weak $Ω\ll Γ$ to the strong driving regime $Ω\gg Γ$, where $Γ$ is the single-atom decay rate. We investigate the early-time dynamics in the transition between the strong and weak driving regimes using: i) angular-dependent observables such as the light emitted by the cloud, and ii) global observables, i.e., the excited state population. When driving the cloud on-resonance, we find that as a function of the driving frequency, the behavior of the collected light at certain angles transitions from the single-photon subradiant regime to a superradiant regime while the behavior of the excited state population does not show superradiance. The experiment shows good agreement with numerical predictions in the regime of parameters under study. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_17187 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Collective early-time spontaneous decay of a strongly driven cold atomic ensemble Orenes, Daniel Benedicto Matias, Naudson Lucas Lopes Apoorva, Apoorva Glicenstein, Antoine Saint-Jalm, Raphaël Kaiser, Robin Quantum Physics Atomic Physics In this work we present a numerical and experimental investigation of the collective early-time decay rates of a strongly driven and optically dense cold atomic cloud. We prepare the atomic ensemble by driving the system to its steady state with varying Rabi frequencies $Ω$ that go from the weak $Ω\ll Γ$ to the strong driving regime $Ω\gg Γ$, where $Γ$ is the single-atom decay rate. We investigate the early-time dynamics in the transition between the strong and weak driving regimes using: i) angular-dependent observables such as the light emitted by the cloud, and ii) global observables, i.e., the excited state population. When driving the cloud on-resonance, we find that as a function of the driving frequency, the behavior of the collected light at certain angles transitions from the single-photon subradiant regime to a superradiant regime while the behavior of the excited state population does not show superradiance. The experiment shows good agreement with numerical predictions in the regime of parameters under study. |
| title | Collective early-time spontaneous decay of a strongly driven cold atomic ensemble |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2511.17187 |