Simple broadband signal detection at the fundamental limit
Fuente:
arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Acceso en línea: | |
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| _version_ | 1866911402924441600 |
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| author | Polloreno, Anthony M. Smith, Graeme |
| author_facet | Polloreno, Anthony M. Smith, Graeme |
| contents | Broadband detection of a weak oscillatory field with unknown carrier frequency underlies magnetometry, axion searches and gravitational-wave sensing. We show that the Grover-like integration-time lower bound for this task is a geometric corollary an upper bound on the integrated quantum Fisher information, a metrological constraint. We further give an all-analog multi-resonant protocol based on a randomized Su-Schrieffer-Heeger control Hamiltonian and an m-register GHZ probe and verify near-optimal scaling through simulation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_19816 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Simple broadband signal detection at the fundamental limit Polloreno, Anthony M. Smith, Graeme Quantum Physics Atomic Physics Broadband detection of a weak oscillatory field with unknown carrier frequency underlies magnetometry, axion searches and gravitational-wave sensing. We show that the Grover-like integration-time lower bound for this task is a geometric corollary an upper bound on the integrated quantum Fisher information, a metrological constraint. We further give an all-analog multi-resonant protocol based on a randomized Su-Schrieffer-Heeger control Hamiltonian and an m-register GHZ probe and verify near-optimal scaling through simulation. |
| title | Simple broadband signal detection at the fundamental limit |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2601.19816 |