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Floquet-tailored Rydberg interactions

Author

Listed:
  • Luheng Zhao

    (National University of Singapore)

  • Michael Dao Kang Lee

    (National University of Singapore)

  • Mohammad Mujahid Aliyu

    (National University of Singapore)

  • Huanqian Loh

    (National University of Singapore
    National University of Singapore)

Abstract

The Rydberg blockade is a key ingredient for entangling atoms in arrays. However, it requires atoms to be spaced well within the blockade radius, which limits the range of local quantum gates. Here we break this constraint using Floquet frequency modulation, with which we demonstrate Rydberg-blockade entanglement beyond the traditional blockade radius and show how the enlarged entanglement range improves qubit connectivity in a neutral atom array. Further, we find that the coherence of entangled states can be extended under Floquet frequency modulation. Finally, we realize Rydberg anti-blockade states for two sodium Rydberg atoms within the blockade radius. Such Rydberg anti-blockade states for atoms at close range enables the robust preparation of strongly-interacting, long-lived Rydberg states, yet their steady-state population cannot be achieved with only the conventional static drive. Our work transforms between the paradigmatic regimes of Rydberg blockade versus anti-blockade and paves the way for realizing more connected, coherent, and tunable neutral atom quantum processors with a single approach.

Suggested Citation

  • Luheng Zhao & Michael Dao Kang Lee & Mohammad Mujahid Aliyu & Huanqian Loh, 2023. "Floquet-tailored Rydberg interactions," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42899-8
    DOI: 10.1038/s41467-023-42899-8
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