Engineering Rydberg-pair interactions in divalent atoms with hyperfine-split ionization thresholds
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929556375470080 |
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| author | Hummel, Frederic Weber, Sebastian Moegerle, Johannes Menke, Henri King, Jonathan Bloom, Benjamin Hofferberth, Sebastian Li, Ming |
| author_facet | Hummel, Frederic Weber, Sebastian Moegerle, Johannes Menke, Henri King, Jonathan Bloom, Benjamin Hofferberth, Sebastian Li, Ming |
| contents | Quantum information processing with neutral atoms relies on Rydberg excitation for entanglement generation. While the use of heavy divalent or open-shell elements, such as strontium or ytterbium, has benefits due to their optically active core and a variety of possible qubit encodings, their Rydberg structure is generally complex. For some isotopes in particular, hyperfine interactions are relevant even for highly excited electronic states. We employ multi-channel quantum defect theory to infer the Rydberg structure of isotopes with non-zero nuclear spin and perform non-perturbative Rydberg-pair interaction calculations. We find that due to the high level density and sensitivities to external fields, experimental parameters must be precisely controlled. Specifically in ${}^{87}$Sr, we study an intrinsic Förster resonance, unique to divalent atoms with hyperfine-split thresholds, which simultaneously provides line stability with respect to external field fluctuations and enhanced long-range interactions. Additionally, we provide parameters for pair states that can be effectively described by single-channel Rydberg series. The explored pair states provide exciting opportunities for applications in the blockade regime as well as for more exotic long-range interactions such as largely flat, distance-independent potentials. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2408_00195 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Engineering Rydberg-pair interactions in divalent atoms with hyperfine-split ionization thresholds Hummel, Frederic Weber, Sebastian Moegerle, Johannes Menke, Henri King, Jonathan Bloom, Benjamin Hofferberth, Sebastian Li, Ming Atomic Physics Quantum Physics Quantum information processing with neutral atoms relies on Rydberg excitation for entanglement generation. While the use of heavy divalent or open-shell elements, such as strontium or ytterbium, has benefits due to their optically active core and a variety of possible qubit encodings, their Rydberg structure is generally complex. For some isotopes in particular, hyperfine interactions are relevant even for highly excited electronic states. We employ multi-channel quantum defect theory to infer the Rydberg structure of isotopes with non-zero nuclear spin and perform non-perturbative Rydberg-pair interaction calculations. We find that due to the high level density and sensitivities to external fields, experimental parameters must be precisely controlled. Specifically in ${}^{87}$Sr, we study an intrinsic Förster resonance, unique to divalent atoms with hyperfine-split thresholds, which simultaneously provides line stability with respect to external field fluctuations and enhanced long-range interactions. Additionally, we provide parameters for pair states that can be effectively described by single-channel Rydberg series. The explored pair states provide exciting opportunities for applications in the blockade regime as well as for more exotic long-range interactions such as largely flat, distance-independent potentials. |
| title | Engineering Rydberg-pair interactions in divalent atoms with hyperfine-split ionization thresholds |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2408.00195 |