Curator's Take
AI Commentary
This article demonstrates that cryogenic cooling can extend neutral‑atom trap lifetimes to two hours while retaining full optical access—a combination previously thought mutually exclusive—thereby removing a key bottleneck for scaling arrays beyond the current few‑thousand‑qubit regime. By showing vacuum‑limited performance with a relatively simple cryostat, the work bridges recent advances in high‑fidelity tweezer control and the push toward massive, error‑corrected neutral‑atom processors, making it easier to integrate long‑coherence storage with fast gate operations. If the approach can be transferred to other species, it could enable practical quantum simulation and algorithmic runs that require minutes of uninterrupted coherence, a prerequisite for many near‑term applications.
— Mark Eatherly
Summary
Neutral-atom quantum processors are rapidly scaling toward system sizes of more than ten thousand qubits, allowing for the realization of a new class of quantum computing algorithms and quantum simulation experiments. However, current neutral-atom platforms generally have to find a compromise between the optical accessibility and the storage time of atoms in optical potentials, limiting the available qubit numbers. Here we report on the operation of a novel, cryogenically enhanced, neutral-atom apparatus that overcomes these apparently conflicting requirements. We demonstrate vacuum-limited trapping lifetimes of up to two hours of single $^{88}\mathrm{Sr}$ atoms in an optical tweezer array while preserving full optical access and without the need for complex cryogenic enclosures. Our measurements show that exceptionally long single-atom lifetimes can be achieved with a relatively simple cryostat design. Our architecture can be straightforwardly ported to other atomic species and shows a viable path for scaling up to sorted arrays of tens of thousands of atoms.