Sequential Measurements as a Resource for Quantum Metrology
Fuente:
arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866913079881629696 |
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| author | Mentesoglu, Koray Trivedi, Rahul Mouradian, Sara |
| author_facet | Mentesoglu, Koray Trivedi, Rahul Mouradian, Sara |
| contents | We present a protocol in which sequential weak measurements of a quantum harmonic oscillator enable simultaneous estimation of both quadratures of a displacement channel. Calculations of the quantum Fisher information show that the measurement backaction can increase the information gained for a range of measurement strengths. The protocol distributes information over a $N$-bit string after $N$ weak measurements. Thus we find that post-processing can be used to avoid information loss due to phase wrapping, increasing the effective dynamic range. Finally, the periodic information extraction makes the protocol robust to decoherence. Our results establish mid-sensing measurement as a resource for single- and multi-parameter quantum metrology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_00287 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Sequential Measurements as a Resource for Quantum Metrology Mentesoglu, Koray Trivedi, Rahul Mouradian, Sara Quantum Physics We present a protocol in which sequential weak measurements of a quantum harmonic oscillator enable simultaneous estimation of both quadratures of a displacement channel. Calculations of the quantum Fisher information show that the measurement backaction can increase the information gained for a range of measurement strengths. The protocol distributes information over a $N$-bit string after $N$ weak measurements. Thus we find that post-processing can be used to avoid information loss due to phase wrapping, increasing the effective dynamic range. Finally, the periodic information extraction makes the protocol robust to decoherence. Our results establish mid-sensing measurement as a resource for single- and multi-parameter quantum metrology. |
| title | Sequential Measurements as a Resource for Quantum Metrology |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2605.00287 |