Site-selective cavity readout and classical error correction of a 5-bit atomic register
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909307811921920 |
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| author | Hu, Beili Sinclair, Josiah Bytyqi, Edita Chong, Michelle Rudelis, Alyssa Ramette, Joshua Vendeiro, Zachary Vuletić, Vladan |
| author_facet | Hu, Beili Sinclair, Josiah Bytyqi, Edita Chong, Michelle Rudelis, Alyssa Ramette, Joshua Vendeiro, Zachary Vuletić, Vladan |
| contents | Optical cavities can provide fast and non-destructive readout of individual atomic qubits; however, scaling up to many qubits remains a challenge. Using locally addressed excited-state Stark shifts to tune atoms out of resonance, we realize site-selective hyperfine-state cavity readout across a 10-site array. The state discrimination fidelity is 0.994(1) for one atom and 0.989(2) averaged over the entire array at a survival probability of 0.975(1). To further speed up array readout, we demonstrate adaptive search strategies utilizing global/subset checks. Finally, we demonstrate repeated rounds of classical error correction, showing exponential suppression of logical error and extending logical memory fivefold beyond the single-bit idling lifetime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_15329 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Site-selective cavity readout and classical error correction of a 5-bit atomic register Hu, Beili Sinclair, Josiah Bytyqi, Edita Chong, Michelle Rudelis, Alyssa Ramette, Joshua Vendeiro, Zachary Vuletić, Vladan Quantum Physics Atomic Physics Optical cavities can provide fast and non-destructive readout of individual atomic qubits; however, scaling up to many qubits remains a challenge. Using locally addressed excited-state Stark shifts to tune atoms out of resonance, we realize site-selective hyperfine-state cavity readout across a 10-site array. The state discrimination fidelity is 0.994(1) for one atom and 0.989(2) averaged over the entire array at a survival probability of 0.975(1). To further speed up array readout, we demonstrate adaptive search strategies utilizing global/subset checks. Finally, we demonstrate repeated rounds of classical error correction, showing exponential suppression of logical error and extending logical memory fivefold beyond the single-bit idling lifetime. |
| title | Site-selective cavity readout and classical error correction of a 5-bit atomic register |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2408.15329 |