Quantum limit to subdiffraction incoherent optical imaging. III. Numerical analysis
| Autor: | Tan, Xiao-Jie, Tsang, Mankei |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Physical Review A 108, 052416 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.108.052416 |
| Popis: | To investigate the fundamental limit to far-field incoherent imaging, the prequels to this work [M. Tsang, Phys. Rev. A 99, 012305 (2019); 104, 052411 (2021)] have studied a quantum lower bound on the error of estimating an object moment and proved a scaling law for the bound with respect to the object size. As the scaling law was proved only in the asymptotic limit of vanishing object size, this work performs a numerical analysis of the quantum bound to verify that the law works well for nonzero object sizes in reality. We also use the numerical bounds to study the optimality of a measurement called spatial-mode demultiplexing or SPADE, showing that SPADE not only follows the scaling but is also numerically close to being optimal, at least for low-order moments. Comment: 9 pages, 2 figures. v2: minor updates, accepted version |
| Databáze: | arXiv |
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