Extracting error thresholds through the framework of approximate quantum error correction condition
The robustness of quantum memory against physical noises is measured by two methods: the exact and approximate quantum error correction (QEC) conditions for error recoverability and the decoder-dependent error threshold which assesses if the logical error rate diminishes with system size. Here we un...
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| Format: | Article |
| Language: | English |
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American Physical Society
2024-12-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.6.043258 |
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| _version_ | 1846127536338108416 |
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| author | Yuanchen Zhao Dong E. Liu |
| author_facet | Yuanchen Zhao Dong E. Liu |
| author_sort | Yuanchen Zhao |
| collection | DOAJ |
| description | The robustness of quantum memory against physical noises is measured by two methods: the exact and approximate quantum error correction (QEC) conditions for error recoverability and the decoder-dependent error threshold which assesses if the logical error rate diminishes with system size. Here we unravel their relations and propose a unified framework to extract an intrinsic error threshold from the approximate QEC condition, which could upper bound other decoder-dependent error thresholds. Our proof establishes that relative entropy, effectively measuring deviations from exact QEC conditions, serves as the order parameter delineating the transition from asymptotic recoverability to unrecoverability. Consequently, we establish a unified framework for determining the error threshold across both exact and approximate QEC codes, addressing errors originating from noise channels as well as those from code space imperfections. This result sharpens our comprehension of error thresholds across diverse QEC codes and error models. |
| format | Article |
| id | doaj-art-867a85f56a034d71b32b9693b21c6964 |
| institution | Kabale University |
| issn | 2643-1564 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-867a85f56a034d71b32b9693b21c69642024-12-11T16:24:25ZengAmerican Physical SocietyPhysical Review Research2643-15642024-12-016404325810.1103/PhysRevResearch.6.043258Extracting error thresholds through the framework of approximate quantum error correction conditionYuanchen ZhaoDong E. LiuThe robustness of quantum memory against physical noises is measured by two methods: the exact and approximate quantum error correction (QEC) conditions for error recoverability and the decoder-dependent error threshold which assesses if the logical error rate diminishes with system size. Here we unravel their relations and propose a unified framework to extract an intrinsic error threshold from the approximate QEC condition, which could upper bound other decoder-dependent error thresholds. Our proof establishes that relative entropy, effectively measuring deviations from exact QEC conditions, serves as the order parameter delineating the transition from asymptotic recoverability to unrecoverability. Consequently, we establish a unified framework for determining the error threshold across both exact and approximate QEC codes, addressing errors originating from noise channels as well as those from code space imperfections. This result sharpens our comprehension of error thresholds across diverse QEC codes and error models.http://doi.org/10.1103/PhysRevResearch.6.043258 |
| spellingShingle | Yuanchen Zhao Dong E. Liu Extracting error thresholds through the framework of approximate quantum error correction condition Physical Review Research |
| title | Extracting error thresholds through the framework of approximate quantum error correction condition |
| title_full | Extracting error thresholds through the framework of approximate quantum error correction condition |
| title_fullStr | Extracting error thresholds through the framework of approximate quantum error correction condition |
| title_full_unstemmed | Extracting error thresholds through the framework of approximate quantum error correction condition |
| title_short | Extracting error thresholds through the framework of approximate quantum error correction condition |
| title_sort | extracting error thresholds through the framework of approximate quantum error correction condition |
| url | http://doi.org/10.1103/PhysRevResearch.6.043258 |
| work_keys_str_mv | AT yuanchenzhao extractingerrorthresholdsthroughtheframeworkofapproximatequantumerrorcorrectioncondition AT dongeliu extractingerrorthresholdsthroughtheframeworkofapproximatequantumerrorcorrectioncondition |