Isotope-agnostic motional ground-state cooling of neutral Yb atoms
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915713539637248 |
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| author | Kroeze, Ronen M. Villela, René A. Zu, Er Höhn, Tim O. Aidelsburger, Monika |
| author_facet | Kroeze, Ronen M. Villela, René A. Zu, Er Höhn, Tim O. Aidelsburger, Monika |
| contents | Efficient high-fidelity ground-state cooling of motional degrees of freedom is crucial for applications in quantum simulation, computing and metrology. Here, we demonstrate direct ground-state cooling of fermionic $^{171}$Yb and bosonic $^{174}$Yb atoms in two- and three-dimensional magic-wavelength optical lattices on the ultranarrow clock transition. Its high spectral resolution offers the potential for reaching extremely low temperatures. To ensure efficient cooling, we develop a chirped sideband cooling scheme, where we sweep the clock-laser frequency to mitigate the effects of spatial trap inhomogeneities. We further generalize the theoretical description of sideband spectra to higher-dimensional lattices for precise thermometry. We achieve 2D ground state fractions of $97\%$ for $^{171}$Yb with an average motional occupation of $\bar{n}\simeq0.015$ and provide a direct comparison with $^{174}$Yb, reaching similar cooling performance. Applying the same scheme in 3D results in $\bar{n}\simeq0.15$ limited by layer-to-layer inhomogeneities in the vertical direction. These results demonstrate efficient motional ground-state cooling in optical lattices, especially for bosonic alkaline-earth(-like) atoms, where other methods are not applicable, opening the door to novel protocols for quantum science applications with neutral atoms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_09031 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Isotope-agnostic motional ground-state cooling of neutral Yb atoms Kroeze, Ronen M. Villela, René A. Zu, Er Höhn, Tim O. Aidelsburger, Monika Atomic Physics Quantum Gases Quantum Physics Efficient high-fidelity ground-state cooling of motional degrees of freedom is crucial for applications in quantum simulation, computing and metrology. Here, we demonstrate direct ground-state cooling of fermionic $^{171}$Yb and bosonic $^{174}$Yb atoms in two- and three-dimensional magic-wavelength optical lattices on the ultranarrow clock transition. Its high spectral resolution offers the potential for reaching extremely low temperatures. To ensure efficient cooling, we develop a chirped sideband cooling scheme, where we sweep the clock-laser frequency to mitigate the effects of spatial trap inhomogeneities. We further generalize the theoretical description of sideband spectra to higher-dimensional lattices for precise thermometry. We achieve 2D ground state fractions of $97\%$ for $^{171}$Yb with an average motional occupation of $\bar{n}\simeq0.015$ and provide a direct comparison with $^{174}$Yb, reaching similar cooling performance. Applying the same scheme in 3D results in $\bar{n}\simeq0.15$ limited by layer-to-layer inhomogeneities in the vertical direction. These results demonstrate efficient motional ground-state cooling in optical lattices, especially for bosonic alkaline-earth(-like) atoms, where other methods are not applicable, opening the door to novel protocols for quantum science applications with neutral atoms. |
| title | Isotope-agnostic motional ground-state cooling of neutral Yb atoms |
| topic | Atomic Physics Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2506.09031 |