Year: 2025
Type: article
Abstract: Neutral-atom quantum processors are a promising platform for large-scale quantum computing. Integrating them with optical cavities enables fast nondestructive qubit readout and access to fast remote entanglement generation for quantum networking. In this work, we introduce a platform for coupling single atoms in optical tweezers to a Fabry-Perot fiber cavity. Leveraging the strong atom-cavity coupling, we demonstrated fast qubit-state readout with [Formula: see text] fidelity and two methods for cavity-mediated entanglement generation with integrated error detection. First, we used cavity-carving to generate a Bell state with 91(4)% fidelity and a 32(1)% success rate (the number in parentheses is the standard deviation). Second, we performed a cavity-mediated gate with a deterministic entanglement fidelity of 52.5(18)%, increased to 76(2)% with error detection. Our approach provides a route toward modular quantum computing and networking.
Source: Science
Institutions: Harvard University, Massachusetts Institute of Technology
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, Defense Advanced Research Projects Agency, Multidisciplinary University Research Initiative, Center for Ultracold Atoms, Massachusetts Institute of Technology, Division of Electrical, Communications and Cyber Systems, Army Research Office
Awards: G1264789558, G1286236842, G1314494723, G1334272675, G1551927532, G1553342353, G1863003419, G2916627489, G3083819904, G42916606, G4608849795, G5206177008, G586693022, Physics and Applications of Quantum Nanophotonics Systems, NNCI: The Center for Nanoscale System (CNS) at Harvard University, G969889393
OpenAlex ID: W4408703970