Local robust shadows on a trapped ion computer -- a case study
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866908992916160512 |
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| author | Wilkens, Jadwiga Guevara-Bertsch, Milena Marso, Marwa Zangerl, Mederika Girtler, Florian Frisch, Albert Ulmanis, Juris Roth, Ingo Kueng, Richard |
| author_facet | Wilkens, Jadwiga Guevara-Bertsch, Milena Marso, Marwa Zangerl, Mederika Girtler, Florian Frisch, Albert Ulmanis, Juris Roth, Ingo Kueng, Richard |
| contents | We experimentally demonstrate local robust shadows on a trapped-ion quantum computing system, a protocol developed to counteract measurement errors. We alternate between a calibration stage and the shadow estimation stage and also introduce Pauli-X-twirling before measurements in both stages to symmetrize error rates. We then demonstrate the protocol on a trapped-ion quantum computer with artificially shortened measurement pulse duration. This yields faster experiments at the cost of increased error rates which are subsequently mitigated by the robust shadow protocol. We benchmark this approach on three exemplary quantum states: a local Haar random state, as well as standard and Pauli-correlation-encoded QAOA states. In all three cases, the local robust shadow protocol succeeds at mitigating the increased error rates hailing from shorter measurement pulse durations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_28307 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Local robust shadows on a trapped ion computer -- a case study Wilkens, Jadwiga Guevara-Bertsch, Milena Marso, Marwa Zangerl, Mederika Girtler, Florian Frisch, Albert Ulmanis, Juris Roth, Ingo Kueng, Richard Quantum Physics We experimentally demonstrate local robust shadows on a trapped-ion quantum computing system, a protocol developed to counteract measurement errors. We alternate between a calibration stage and the shadow estimation stage and also introduce Pauli-X-twirling before measurements in both stages to symmetrize error rates. We then demonstrate the protocol on a trapped-ion quantum computer with artificially shortened measurement pulse duration. This yields faster experiments at the cost of increased error rates which are subsequently mitigated by the robust shadow protocol. We benchmark this approach on three exemplary quantum states: a local Haar random state, as well as standard and Pauli-correlation-encoded QAOA states. In all three cases, the local robust shadow protocol succeeds at mitigating the increased error rates hailing from shorter measurement pulse durations. |
| title | Local robust shadows on a trapped ion computer -- a case study |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2603.28307 |