DOE OSTI · 3391496
High-fidelity entanglement and coherent multi-qubit mapping in an atom array
Abstract
Neutral atoms in optical tweezer arrays possess broad applicability for quantum technologies, such as computing, analogue simulation and metrology. The atomic species ytterbium-171 is able to host multiple types of qubits, making it a strong candidate for bridging various applications of tweezer arrays. Realizing this potential requires high-fidelity generation and transfer of many-body entanglement between these distinct qubit degrees of freedom. Here, in this study, we demonstrate the creation and coherent mapping of entangled quantum states across multiple qubits in ytterbium-171 tweezer arrays. We map entangled states onto the optical clock qubit from the nuclear spin qubit or the Rydberg qubit. We coherently transfer Z 2 -ordered Greenberger–Horne–Zeilinger states of up to 20 atoms from the interacting Rydberg manifold to the metastable nuclear spin manifold. Furthermore, we find that clock-qubit-based spin detection, when applied to Rydberg and nuclear spin qubits, facilitates atom-loss-detectable qubit measurements and Rydberg decay detection. This enables delayed-erasure detection, yielding an error-detected two-qubit gate fidelity of 99.78(4)% in metastable qubits. These results establish a versatile architecture that advances multiple fields of quantum information science while also establishing bridges between them.
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Senoo, Aruku [University of Colorado, Boulder, CO (United States). Joint Institute for Laboratory Astrophysics (JILA); National Institute of Standards and Technology (NIST), Boulder, CO (United States)] (ORCID:0000000207644322), Baumgärtner, Alexander [University of Colorado, Boulder, CO (United States). Joint Institute for Laboratory Astrophysics (JILA); National Institute of Standards and Technology (NIST), Boulder, CO (United States)] (ORCID:0000000228023074), Lis, Joanna W. [University of Colorado, Boulder, CO (United States). Joint Institute for Laboratory Astrophysics (JILA); National Institute of Standards and Technology (NIST), Boulder, CO (United States)] (ORCID:0000000340279045), Vaidya, Gaurav M. [University of Colorado, Boulder, CO (United States). Joint Institute for Laboratory Astrophysics (JILA); National Institute of Standards and Technology (NIST), Boulder, CO (United States)] (ORCID:0009000983739882), Zeng, Zhongda [University of Innsbruck (Austria); Austrian Academy of Sciences (ÖAW), Innsbruck (Austria)] (ORCID:0000000291395014), Giudici, Giuliano [University of Innsbruck (Austria); Austrian Academy of Sciences (ÖAW), Innsbruck (Austria)], Pichler, Hannes [University of Innsbruck (Austria); Austrian Academy of Sciences (ÖAW), Innsbruck (Austria)] (ORCID:000000032144536X), Kaufman, Adam M. [University of Colorado, Boulder, CO (United States). Joint Institute for Laboratory Astrophysics (JILA); National Institute of Standards and Technology (NIST), Boulder, CO (United States)] (ORCID:0000000349565814). 2026-06-12. High-fidelity entanglement and coherent multi-qubit mapping in an atom array. https://doi.org/10.1038/s41567-026-03258-8
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