High-Fidelity Inter-Species Rydberg Gates with Two-Photon Driving
Abstract
Recently, neutral atom arrays have become known for their promising potential in quantum information processing. High-fidelity entangling operations are typically achieved by exciting atoms to high-lying Rydberg states through two-photon processes. To improve the performance of these systems at the hardware level, dual-species strategies have been applied to enhance readout, error correction, and reloading in neutral atom systems. However, the influence of laser crosstalk arising from two-photon excitation for dual-species systems has remained largely unexplored in the literature. Here, we develop a model that incorporates the influence of crosstalk in inter-species Rydberg gates with two-photon driving. We demonstrate that the influence of this crosstalk can be suppressed to arbitrarily small levels through appropriate gate design, with gate fidelities greater than 99.8% achievable with conservative experimental parameters in the near-detuned case of an 85Rb/87Rb system. We also outline how this fidelity can be further enhanced through improvements to the Rydberg excitation.
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BibTeX
@misc{wang2026highfidelity,
title = {{High-Fidelity Inter-Species Rydberg Gates with Two-Photon Driving}},
author = {Shuan Wang and Kevin Singh},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.08926},
eprint = {2610.08926},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.08926},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - High-Fidelity Inter-Species Rydberg Gates with Two-Photon Driving
AU - Shuan Wang
AU - Kevin Singh
PY - 2026
DA - 2026/10/06
PB - arXiv
DO - 10.48550/arxiv.2610.08926
UR - https://arxiv.org/abs/2610.08926
AB - Recently, neutral atom arrays have become known for their promising potential in quantum information processing. High-fidelity entangling operations are typically achieved by exciting atoms to high-lying Rydberg states through two-photon processes. To improve the performance of these systems at the hardware level, dual-species strategies have been applied to enhance readout, error correction, and reloading in neutral atom systems. However, the influence of laser crosstalk arising from two-photon excitation for dual-species systems has remained largely unexplored in the literature. Here, we develop a model that incorporates the influence of crosstalk in inter-species Rydberg gates with two-photon driving. We demonstrate that the influence of this crosstalk can be suppressed to arbitrarily small levels through appropriate gate design, with gate fidelities greater than 99.8% achievable with conservative experimental parameters in the near-detuned case of an ^85Rb/^87Rb system. We also outline how this fidelity can be further enhanced through improvements to the Rydberg excitation.
ER -