Imprecision plateaus in quantum steering
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866912241143513088 |
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| author | Svegborn, Elna d'Alessandro, Nicola Gühne, Otfried Tavakoli, Armin |
| author_facet | Svegborn, Elna d'Alessandro, Nicola Gühne, Otfried Tavakoli, Armin |
| contents | We study tests of quantum steering in which the trusted party does not have perfect control of their measurements. We report on steering inequalities that remain unaffected when introducing up to a threshold magnitude of measurement imprecision. This phenomenon, which we call an imprecision plateau, thus permits a departure from the standard assumption of idealised measurements without any incuring cost to the detection power of steering experiments. We provide an explanation for why imprecision plateaus are possible, a simple criterion for their existence and tools for analysing their properties. We also demonstrate that these plateaus have natural applications when the assumption of perfect measurements is relaxed: they allow for maintaining both the noise- and loss-robustness of standard steering tests and the performance rate of idealised one-sided device-independent random number generators. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_12280 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Imprecision plateaus in quantum steering Svegborn, Elna d'Alessandro, Nicola Gühne, Otfried Tavakoli, Armin Quantum Physics We study tests of quantum steering in which the trusted party does not have perfect control of their measurements. We report on steering inequalities that remain unaffected when introducing up to a threshold magnitude of measurement imprecision. This phenomenon, which we call an imprecision plateau, thus permits a departure from the standard assumption of idealised measurements without any incuring cost to the detection power of steering experiments. We provide an explanation for why imprecision plateaus are possible, a simple criterion for their existence and tools for analysing their properties. We also demonstrate that these plateaus have natural applications when the assumption of perfect measurements is relaxed: they allow for maintaining both the noise- and loss-robustness of standard steering tests and the performance rate of idealised one-sided device-independent random number generators. |
| title | Imprecision plateaus in quantum steering |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2408.12280 |