High-fidelity entangling gates and nonlocal circuits with neutral atoms
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866913070893236224 |
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| author | Evered, Simon J. Xu, Muqing Li, Sophie H. Geim, Alexandra A. Ataides, J. Pablo Bonilla Kalinowski, Marcin Bluvstein, Dolev Maskara, Nishad Kokail, Christian Greiner, Markus Vuletić, Vladan Lukin, Mikhail D. |
| author_facet | Evered, Simon J. Xu, Muqing Li, Sophie H. Geim, Alexandra A. Ataides, J. Pablo Bonilla Kalinowski, Marcin Bluvstein, Dolev Maskara, Nishad Kokail, Christian Greiner, Markus Vuletić, Vladan Lukin, Mikhail D. |
| contents | Creation and manipulation of entanglement with low error is essential in quantum information systems. In practice, two-qubit entangling gates constitute a dominant error source, limiting circuit depths and performance in fault-tolerant architectures. Using a neutral-atom quantum processor, we realize entangling CZ gates with a high Rabi frequency smooth-amplitude pulse, employing state-selective readout and qubit reuse for fast calibration, and achieve state-of-the-art fidelities of 99.854(4)% which improve to 99.941(3)% upon loss postselection, with stable performance for 10 hours. We then use these low-error gates in quantum circuits with coherent atom rearrangement. We first benchmark performance by creating and disentangling cluster states, and subsequently implement scrambling circuits featuring longer-range connectivity to study non-locally entangled states generated through chaotic dynamics. These results pave the way towards deep-circuit, efficient fault-tolerant quantum computation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_25987 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High-fidelity entangling gates and nonlocal circuits with neutral atoms Evered, Simon J. Xu, Muqing Li, Sophie H. Geim, Alexandra A. Ataides, J. Pablo Bonilla Kalinowski, Marcin Bluvstein, Dolev Maskara, Nishad Kokail, Christian Greiner, Markus Vuletić, Vladan Lukin, Mikhail D. Quantum Physics Atomic Physics Creation and manipulation of entanglement with low error is essential in quantum information systems. In practice, two-qubit entangling gates constitute a dominant error source, limiting circuit depths and performance in fault-tolerant architectures. Using a neutral-atom quantum processor, we realize entangling CZ gates with a high Rabi frequency smooth-amplitude pulse, employing state-selective readout and qubit reuse for fast calibration, and achieve state-of-the-art fidelities of 99.854(4)% which improve to 99.941(3)% upon loss postselection, with stable performance for 10 hours. We then use these low-error gates in quantum circuits with coherent atom rearrangement. We first benchmark performance by creating and disentangling cluster states, and subsequently implement scrambling circuits featuring longer-range connectivity to study non-locally entangled states generated through chaotic dynamics. These results pave the way towards deep-circuit, efficient fault-tolerant quantum computation. |
| title | High-fidelity entangling gates and nonlocal circuits with neutral atoms |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2604.25987 |