Dresden 2026 – scientific programme
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QI: Fachverband Quanteninformation
QI 2: Implementations I
QI 2.3: Talk
Monday, March 9, 2026, 10:15–10:30, BEY/0245
Robust universal gate set for neutral-atom qudits — Amir Burshtein1, •Shachar Fraenkel1, Moshe Goldstein1, and Ran Finkelstein1,2 — 1School of Physics and Astronomy, Tel Aviv University, Tel Aviv 6997801, Israel — 2The Center for Nanoscience & Nanotechnology, Tel Aviv University, Tel Aviv 6997801, Israel
Quantum devices comprised of native qudits, instead of qubits, offer promising advantages for quantum simulation and fault-tolerant quantum computation, yet efficient schemes for the control and entanglement of qudits in quantum hardware remain scarce. In particular, no experimental demonstration of multi-qudit control has been achieved to date in neutral-atom arrays. We propose a universal control scheme for qudits encoded in ground and metastable states of neutral atoms. Within this scheme, single-qudit gates are implemented efficiently via the simultaneous driving of multiple transition frequencies. For entangling operations, we provide a recipe implementing any symmetric controlled-phase gate (e.g., controlled-Z) for any qudit dimension d. The recipe relies on a global drive, a key requirement for high experimental fidelity, and involves pulses that simultaneously drive two different Rydberg transitions, which we prove to be the minimal number generally necessary for realizing such global-drive phase gates. This underlines a more general need for adjusting the notion of a universal gate set to the practical limitations of the hardware of interest. The gates we design are easy to calibrate and robust to realistic experimental imperfections, as we demonstrate via extensive noise simulations.
Reference: arXiv:2508.16294
Keywords: Qudits; Neutral atoms; Quantum simulation; Quantum computation