Dual-Element, Two-Dimensional Atom Array with Continuous-Mode Operation

• Published in: Physical review. X Vol. 12; no. 1; p. 011040
• Main Authors: Singh, Kevin, Anand, Shraddha, Pocklington, Andrew, Kemp, Jordan T., Bernien, Hannes
• Format: Journal Article
• Language: English
• Published: College Park American Physical Society 01-03-2022; American Physical Society (APS)
• Subjects: Arrays; atom & ion cooling; Atomic properties; Cesium; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Cold atoms; cooling & trapping; Crosstalk; Data processing; Error analysis; Error correction; Error correction & detection; hybrid quantum systems; Hybrid systems; Neutral atoms; optical tweezers; Processors; Quantum computing; quantum information architectures & platforms; Quantum nondemolition; Quantum phenomena; Qubits (quantum computing); Rubidium; Trapping
• ISSN: 2160-3308; 2160-3308
• DOI: 10.1103/PhysRevX.12.011040

Quantum processing architectures that include multiple qubit modalities offer compelling strategies for high-fidelity operations and readout, quantum error correction, and a path for scaling to large system sizes. Such hybrid architectures have been realized for leading platforms, including superconducting circuits and trapped ions. Recently, a new approach for constructing large, coherent quantum processors has emerged based on arrays of individually trapped neutral atoms. However, these demonstrations have been limited to arrays of a single atomic element where the identical nature of the atoms makes crosstalk-free control and nondemolition readout of a large number of atomic qubits challenging. Here we introduce a dual-element atom array with individual control of single rubidium and cesium atoms. We demonstrate their independent placement in arrays with up to 512 trapping sites and observe negligible crosstalk between the two elements. Furthermore, by continuously reloading one atomic element while maintaining an array of the other, we demonstrate a new continuous operation mode for atom arrays without any off-time. Our results enable avenues for auxiliary-qubit-assisted quantum protocols such as quantum nondemolition measurements and quantum error correction, as well as continuously operating quantum processors and sensors.