First-principles construction of symmetry-informed quantum metrologies
Fuente:
arXiv
Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912016096034816 |
|---|---|
| author | Rubio, Jesús |
| author_facet | Rubio, Jesús |
| contents | Combining quantum and Bayesian principles leads to optimality in metrology, but the optimisation equations involved are often hard to solve. This work mitigates this problem with a novel class of measurement strategies for quantities isomorphic to location parameters, which are shown to admit a closed-form optimisation. The resulting framework admits any parameter range, prior information, or state, and the associated estimators apply to finite samples. As an example, the metrology of relative weights is formulated from first principles and shown to require hyperbolic errors. The primary advantage of this approach lies in its simplifying power: it reduces the search for good strategies to identifying which symmetry leaves a state of maximum ignorance invariant. This will facilitate the application of quantum metrology to fundamental physics, where symmetries play a key role. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16410 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | First-principles construction of symmetry-informed quantum metrologies Rubio, Jesús Quantum Physics Mathematical Physics Data Analysis, Statistics and Probability Combining quantum and Bayesian principles leads to optimality in metrology, but the optimisation equations involved are often hard to solve. This work mitigates this problem with a novel class of measurement strategies for quantities isomorphic to location parameters, which are shown to admit a closed-form optimisation. The resulting framework admits any parameter range, prior information, or state, and the associated estimators apply to finite samples. As an example, the metrology of relative weights is formulated from first principles and shown to require hyperbolic errors. The primary advantage of this approach lies in its simplifying power: it reduces the search for good strategies to identifying which symmetry leaves a state of maximum ignorance invariant. This will facilitate the application of quantum metrology to fundamental physics, where symmetries play a key role. |
| title | First-principles construction of symmetry-informed quantum metrologies |
| topic | Quantum Physics Mathematical Physics Data Analysis, Statistics and Probability |
| url | https://arxiv.org/abs/2402.16410 |