analiza aiqbench
This research introduces native iSWAP and exchange gates for neutral-atom quantum processors by leveraging dipole-dipole interactions between Rydberg states, moving beyond traditional blockade-based entangling methods. The study demonstrates that high-fidelity pulses exceeding 99.9% are achievable under realistic noise conditions for both alkali and alkaline-earth atomic systems. These advances significantly expand the operational gate set for neutral-atom architectures, addressing key challenges in scalability and noise resilience.
Expanding the Neutral Atom Gate Set: Native iSWAP and Exchange Gates from Dipolar Rydberg Interactions
arXiv:2512.05037v3 Announce Type: replace Abstract: We present a native realization of iSWAP and parametrized \textit{exchange} gates for neutral-atom quantum processing units. Our approach leverages strong dipole-dipole interactions between two different dipole-coupled Rydberg states, employing optimal control techniques to design high-fidelity, time-efficient gate pulses. To minimize experimental complexity, we utilize global driving fields acting identically on all atoms and apply pulse smoothing techniques. While detrimental van der Waals interactions pose a significant challenge, we demonstrate that for both $^{133}$Cs, as a representative alkali atom, and $^{88}$Sr, an alkaline-earth species, high-fidelity pulses can nevertheless be obtained over a broad range of parameters. We identify candidate protocols with reduced susceptibility to noise and analyze their performance under realistic conditions, accounting for atomic motion, Rydberg decay, and experimentally motivated laser frequency and intensity noise. Crucially, we demonstrate that in both Alkali and alkaline-earth-based systems, we can obtain fast iSWAP gates with fidelities of $99.9\%$ under realistic experimental conditions. These results pave the way for expanding the neutral-atom gate set beyond conventional Rydberg-blockade-based entangling gates.
Abstract:We present a native realization of iSWAP and parametrized \textit{exchange} gates for neutral-atom quantum processing units. Our approach leverages strong dipole-dipole interactions between two different dipole-coupled Rydberg states, employing optimal control techniques to design high-fidelity, time-efficient gate pulses. To minimize experimental complexity, we utilize global driving fields acting identically on all atoms and apply pulse smoothing techniques. While detrimental van der Waals interactions pose a significant challenge, we demonstrate that for both $^{133}$Cs, as a representative alkali atom, and $^{88}$Sr, an alkaline-earth species, high-fidelity pulses can nevertheless be obtained over a broad range of parameters. We identify candidate protocols with reduced susceptibility to noise and analyze their performance under realistic conditions, accounting for atomic motion, Rydberg decay, and experimentally motivated laser frequency and intensity noise. Crucially, we demonstrate that in both Alkali and alkaline-earth-based systems, we can obtain fast iSWAP gates with fidelities of $99.9\%$ under realistic experimental conditions. These results pave the way for expanding the neutral-atom gate set beyond conventional Rydberg-blockade-based entangling gates.
arXiv:2512.05037 [quant-ph]
(or arXiv:2512.05037v3 [quant-ph] for this version)
Ildefonso, P., Byun, A., Konovalov, A., Kazemi, J., Schuler, M., & Lechner, W. (2026). Expanding the neutral-atom gate set: Native iSWAP and exchange gates from dipolar Rydberg interactions. Physical Review Research, 8(3), 033269
https://doi.org/10.1103/z46h-mgh4 DOI(s) linking to related resources
Text integral sub licența deschisă a publicației · 212 cuvinte
