Work

Fast quantum gates for neutral atoms separated by a few tens of micrometers

Year: 2026

Type: article

Abstract: We present a theoretical scheme for a family of fast and high-fidelity two-qubit gates between neutral atoms separated by more than 20 µ m , enabled by resonant dipole-dipole spin-exchange interactions between Rydberg states. The protocol harnesses coherent excitation-exchange-deexcitation dynamics between the qubit and the Rydberg states within a single and smooth laser pulse, in the presence of strong dipole-dipole interactions. We utilize optimal control methods to achieve theoretical gate fidelities and durations comparable to blockade-based gates in the presence of relevant noise, while extending the effective interaction range by an order of magnitude. This enables entanglement well beyond the blockade radius, offering a route toward fast, high-connectivity quantum processors.

Source: Physical Review Research

DOI: 10.1103/hjrh-4327

Authors: Matteo Bergonzoni, Rosario Roberto Riso, Guido Pupillo

Institutions: Centre National de la Recherche Scientifique, Université de Strasbourg, Norwegian University of Science and Technology

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funders: Agence Nationale de la Recherche, Institut Universitaire de France