Testing the accuracy of qubit rotations on a public quantum computer
We analyze the results of the test of π/2 qubit rotations on a public quantum computer provided by IBM. We measure a single qubit rotated by π/2 about a random axis, and we accumulate vast statistics of the results. The test performed on different devices shows systematic deviations from the theoret...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-03-01
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| Series: | Frontiers in Physics |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2024.1360080/full |
| _version_ | 1797272574545100800 |
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| author | Tomasz Białecki Tomasz Rybotycki Tomasz Rybotycki Jakub Tworzydło Adam Bednorz |
| author_facet | Tomasz Białecki Tomasz Rybotycki Tomasz Rybotycki Jakub Tworzydło Adam Bednorz |
| author_sort | Tomasz Białecki |
| collection | DOAJ |
| description | We analyze the results of the test of π/2 qubit rotations on a public quantum computer provided by IBM. We measure a single qubit rotated by π/2 about a random axis, and we accumulate vast statistics of the results. The test performed on different devices shows systematic deviations from the theoretical predictions, which appear at level 10–3. Some of the differences, beyond 5 standard deviations, cannot be explained by simple corrections due to nonlinearities of pulse generations. The magnitude of the deviation is comparable with the randomized benchmarking of the gate, but we additionally observe a pronounced parametric dependence. We discuss other possible reasons for the deviations, including states beyond the single-qubit space. The deviations have a similar structure for various devices used at different times, so they can also serve as a diagnostic tool to eliminate imperfect gate implementations and a faithful description of the involved physical systems. |
| first_indexed | 2024-03-07T14:31:19Z |
| format | Article |
| id | doaj.art-b1d944670c3c4d4a9827cd359156e427 |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-03-07T14:31:19Z |
| publishDate | 2024-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-b1d944670c3c4d4a9827cd359156e4272024-03-06T04:46:31ZengFrontiers Media S.A.Frontiers in Physics2296-424X2024-03-011210.3389/fphy.2024.13600801360080Testing the accuracy of qubit rotations on a public quantum computerTomasz Białecki0Tomasz Rybotycki1Tomasz Rybotycki2Jakub Tworzydło3Adam Bednorz4Faculty of Physics, University of Warsaw, Warsaw, PolandSystems Research Institute, Polish Academy of Sciences, Warsaw, PolandCenter for Theoretical Physics, Polish Academy of Sciences, Warsaw, PolandFaculty of Physics, University of Warsaw, Warsaw, PolandFaculty of Physics, University of Warsaw, Warsaw, PolandWe analyze the results of the test of π/2 qubit rotations on a public quantum computer provided by IBM. We measure a single qubit rotated by π/2 about a random axis, and we accumulate vast statistics of the results. The test performed on different devices shows systematic deviations from the theoretical predictions, which appear at level 10–3. Some of the differences, beyond 5 standard deviations, cannot be explained by simple corrections due to nonlinearities of pulse generations. The magnitude of the deviation is comparable with the randomized benchmarking of the gate, but we additionally observe a pronounced parametric dependence. We discuss other possible reasons for the deviations, including states beyond the single-qubit space. The deviations have a similar structure for various devices used at different times, so they can also serve as a diagnostic tool to eliminate imperfect gate implementations and a faithful description of the involved physical systems.https://www.frontiersin.org/articles/10.3389/fphy.2024.1360080/fullqubitquantum computerHilbert spaceBloch spherequantum gate |
| spellingShingle | Tomasz Białecki Tomasz Rybotycki Tomasz Rybotycki Jakub Tworzydło Adam Bednorz Testing the accuracy of qubit rotations on a public quantum computer Frontiers in Physics qubit quantum computer Hilbert space Bloch sphere quantum gate |
| title | Testing the accuracy of qubit rotations on a public quantum computer |
| title_full | Testing the accuracy of qubit rotations on a public quantum computer |
| title_fullStr | Testing the accuracy of qubit rotations on a public quantum computer |
| title_full_unstemmed | Testing the accuracy of qubit rotations on a public quantum computer |
| title_short | Testing the accuracy of qubit rotations on a public quantum computer |
| title_sort | testing the accuracy of qubit rotations on a public quantum computer |
| topic | qubit quantum computer Hilbert space Bloch sphere quantum gate |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2024.1360080/full |
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