A dual-element, two-dimensional atom array with continuous-mode operation

Abstract

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 non-demolition 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 ancilla-assisted quantum protocols such as quantum non-demolition measurements and quantum error correction, as well as continuously operating quantum processors and sensors.

11 pages, 8 figures

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Cited by in corpus (16)

• Ytterbium nuclear-spin qubits in an optical tweezer array
• Mid-circuit correction of correlated phase errors using an array of spectator qubits
• Quantum optimization with arbitrary connectivity using Rydberg atom arrays
• Nishimori's cat: stable long-range entanglement from finite-depth unitaries and weak measurements
• Single atom trapping in a metasurface lens optical tweezer
• Parallel assembly of arbitrary defect-free atom arrays with a multi-tweezer algorithm
• A simple, passive design for large optical trap arrays for single atoms
• Protocols for Rydberg entangling gates featuring robustness against quasi-static errors
• An architecture for quantum networking of neutral atom processors
• Dissipative stabilization of dark quantum dimers via squeezed vacuum
• Preparation of ${}^{87}$Rb and ${}^{133}$Cs in the motional ground state of a single optical tweezer
• Efficient two-dimensional defect-free dual-species atom arrays rearrangement algorithm with near-fewest atom moves
• Improving the performance of quantum approximate optimization for preparing non-trivial quantum states without translational symmetry
• Interleaved dual-species arrays of single atoms using a passive optical element and one trapping laser
• A quantum register using collective excitations in a Bose-Einstein condensate
• Parallel assembly of neutral atom arrays with an SLM using linear phase interpolation