Achieving High Filling of an Optical Lattice by Light-Assisted Redistribution of Atoms
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866913144088035328 |
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| author | Weiss, Lauren Yamaguchi, Evan Pritts, Claire Mežnaršič, Tadej Chin, Cheng |
| author_facet | Weiss, Lauren Yamaguchi, Evan Pritts, Claire Mežnaršič, Tadej Chin, Cheng |
| contents | Scalable arrays of individual atoms provide an ideal starting point for quantum information and simulation experiments. However, their preparation is often limited by light-assisted collisions (LACs), which typically result in parity-projected filling fractions of $f \approx 0.5$. In this work we demonstrate a light-assisted redistribution process in the Quantum Matter Synthesizer that overcomes this constraint by stochastically moving atoms from multiply occupied lattice sites to neighboring vacant sites. Using a blue-detuned optical pumping beam during degenerate Raman sideband cooling, we achieve single-atom filling fractions of $70-80\%$. We find that over 50$\%$ of the atoms involved in radiative collisions are retained in the lattice. The redistribution process involves many LACs over an extended time as atoms diffuse to empty sites. Our demonstration offers a scalable and efficient pathway toward unity-filled atom arrays without the need for complex rearrangement protocols, with broad applicability to quantum simulation, precision measurements, and quantum information control. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_19115 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Achieving High Filling of an Optical Lattice by Light-Assisted Redistribution of Atoms Weiss, Lauren Yamaguchi, Evan Pritts, Claire Mežnaršič, Tadej Chin, Cheng Atomic Physics Quantum Physics Scalable arrays of individual atoms provide an ideal starting point for quantum information and simulation experiments. However, their preparation is often limited by light-assisted collisions (LACs), which typically result in parity-projected filling fractions of $f \approx 0.5$. In this work we demonstrate a light-assisted redistribution process in the Quantum Matter Synthesizer that overcomes this constraint by stochastically moving atoms from multiply occupied lattice sites to neighboring vacant sites. Using a blue-detuned optical pumping beam during degenerate Raman sideband cooling, we achieve single-atom filling fractions of $70-80\%$. We find that over 50$\%$ of the atoms involved in radiative collisions are retained in the lattice. The redistribution process involves many LACs over an extended time as atoms diffuse to empty sites. Our demonstration offers a scalable and efficient pathway toward unity-filled atom arrays without the need for complex rearrangement protocols, with broad applicability to quantum simulation, precision measurements, and quantum information control. |
| title | Achieving High Filling of an Optical Lattice by Light-Assisted Redistribution of Atoms |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2605.19115 |