Engineering Rydberg-pair interactions in divalent atoms with hyperfine-split ionization thresholds

Hummel F, Weber S, Mögerle J, Menke H, King J, Bloom B, Hofferberth S, Li M (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Physical Review A American Physical Society

Book Volume: 110

Article Number: 042821

Journal Issue: 4

DOI: 10.1103/PhysRevA.110.042821

Abstract

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 multichannel quantum defect theory to infer the Rydberg structure of isotopes with nonzero nuclear spin and perform nonperturbative 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 Sr87, 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.

Authors with CRIS profile

Henri Menke Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien

Involved external institutions

Universität Stuttgart DE Germany (DE) Rheinische Friedrich-Wilhelms-Universität Bonn DE Germany (DE)

How to cite

APA:

Hummel, F., Weber, S., Mögerle, J., Menke, H., King, J., Bloom, B.,... Li, M. (2024). Engineering Rydberg-pair interactions in divalent atoms with hyperfine-split ionization thresholds. Physical Review A, 110(4). https://doi.org/10.1103/PhysRevA.110.042821

MLA:

Hummel, Frederic, et al. "Engineering Rydberg-pair interactions in divalent atoms with hyperfine-split ionization thresholds." Physical Review A 110.4 (2024).

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