Easy better quantum process tomography
Fuente:
arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866912271841624064 |
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| author | Blume-Kohout, Robin Rudinger, Kenneth Proctor, Timothy |
| author_facet | Blume-Kohout, Robin Rudinger, Kenneth Proctor, Timothy |
| contents | Quantum process tomography (QPT), used to estimate the linear map that best describes a quantum operation, is usually performed using a priori assumptions about state preparation and measurement (SPAM), which yield a biased and inconsistent estimator. This estimate can be made more accurate and less biased by incorporating SPAM-calibration data. Unobservable properties of the SPAM operations introduce a small gauge freedom that can be regularized using the a priori SPAM. We give an explicit correction procedure for standard linear-inversion QPT and overcomplete linear-inversion QPT, and describe how to extend it to statistically principled estimators like maximum likelihood estimation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_16293 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Easy better quantum process tomography Blume-Kohout, Robin Rudinger, Kenneth Proctor, Timothy Quantum Physics Quantum process tomography (QPT), used to estimate the linear map that best describes a quantum operation, is usually performed using a priori assumptions about state preparation and measurement (SPAM), which yield a biased and inconsistent estimator. This estimate can be made more accurate and less biased by incorporating SPAM-calibration data. Unobservable properties of the SPAM operations introduce a small gauge freedom that can be regularized using the a priori SPAM. We give an explicit correction procedure for standard linear-inversion QPT and overcomplete linear-inversion QPT, and describe how to extend it to statistically principled estimators like maximum likelihood estimation. |
| title | Easy better quantum process tomography |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2412.16293 |