How Tweezers and Lattices Stabilize Rydberg Qubit Gates

Researchers have achieved a two-qubit gate error contribution from position noise below $10^{-4}$, a significant step toward more stable neutral-atom quantum computers. Valentin Magro of the National Institutes of Natural Sciences, and Wojciech Adamczyk of the Institute for Quantum Electronics, ETH Zürich, Zürich, Switzerland and Quantum Center, along with colleagues from RIKEN Center for Quantum Computing, detail techniques combining optical tweezers and lattices to coherently control atomic motion. Their protocols demonstrate robustness to alignment errors up to 50 nanometers and thermal excitation up to $n = 3$, while heating the atom by less than $\Delta n =…