Sustaining high-fidelity quantum logic in neutral-atom circuits via mid-circuit operations
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2026
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866911478543548416 |
|---|---|
| author | Lin, Rui Li, You Zheng, Le-Tian Hu, Tai-Ran Chen, Si-Yuan Wu, Hong-Ming Zhang, Yu-Chen Cheng, Hao-Wen Deng, Yu-Hao Wu, Zhan Chen, Ming-Cheng Rui, Jun Lu, Chao-Yang Pan, Jian-Wei |
| author_facet | Lin, Rui Li, You Zheng, Le-Tian Hu, Tai-Ran Chen, Si-Yuan Wu, Hong-Ming Zhang, Yu-Chen Cheng, Hao-Wen Deng, Yu-Hao Wu, Zhan Chen, Ming-Cheng Rui, Jun Lu, Chao-Yang Pan, Jian-Wei |
| contents | The realization of fault-tolerant quantum computation hinges on the ability to execute deep quantum circuits while maintaining gate fidelities consistently above error-correction thresholds. Although neutral-atom arrays have recently demonstrated high-fidelity two-qubit gates and early-stage logical quantum processors, sustaining such high performance across deep, repetitive circuits remains a formidable challenge due to cumulative motional heating and atom loss. Here we demonstrate a sustainable neutral-atom framework that overcomes these limitations by integrating a suite of hardware-efficient mid-circuit operations. We report a two-qubit controlled logic gate with a raw fidelity of 99.60(1)%, which is further increased to a fidelity of 99.81(1)% via non-destructive erasure detection. Crucially, by implementing in-circuit Raman sideband cooling and qubit re-initialization, we demonstrate that gate fidelities can be maintained at the ~99.8% level across multiple operational rounds without observable degradation. By actively managing the internal and motional entropy of the system mid-stream, our in-situ refreshable architecture provides a critical pathway for executing the repeated syndrome-extraction cycles required for large-scale, continuous quantum error correction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_01612 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Sustaining high-fidelity quantum logic in neutral-atom circuits via mid-circuit operations Lin, Rui Li, You Zheng, Le-Tian Hu, Tai-Ran Chen, Si-Yuan Wu, Hong-Ming Zhang, Yu-Chen Cheng, Hao-Wen Deng, Yu-Hao Wu, Zhan Chen, Ming-Cheng Rui, Jun Lu, Chao-Yang Pan, Jian-Wei Quantum Physics Atomic Physics The realization of fault-tolerant quantum computation hinges on the ability to execute deep quantum circuits while maintaining gate fidelities consistently above error-correction thresholds. Although neutral-atom arrays have recently demonstrated high-fidelity two-qubit gates and early-stage logical quantum processors, sustaining such high performance across deep, repetitive circuits remains a formidable challenge due to cumulative motional heating and atom loss. Here we demonstrate a sustainable neutral-atom framework that overcomes these limitations by integrating a suite of hardware-efficient mid-circuit operations. We report a two-qubit controlled logic gate with a raw fidelity of 99.60(1)%, which is further increased to a fidelity of 99.81(1)% via non-destructive erasure detection. Crucially, by implementing in-circuit Raman sideband cooling and qubit re-initialization, we demonstrate that gate fidelities can be maintained at the ~99.8% level across multiple operational rounds without observable degradation. By actively managing the internal and motional entropy of the system mid-stream, our in-situ refreshable architecture provides a critical pathway for executing the repeated syndrome-extraction cycles required for large-scale, continuous quantum error correction. |
| title | Sustaining high-fidelity quantum logic in neutral-atom circuits via mid-circuit operations |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2603.01612 |