arXiv Open Access 2026

Simple broadband signal detection at the fundamental limit

Anthony M. Polloreno Graeme Smith

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Abstrak

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.

Topik & Kata Kunci

quant-ph physics.atom-ph

Penulis (2)

Anthony M. Polloreno

Graeme Smith

Format Sitasi

APA MLA BibTeX

Polloreno, A.M., Smith, G. (2026). Simple broadband signal detection at the fundamental limit. https://arxiv.org/abs/2601.19816

Akses Cepat

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Informasi Jurnal

Tahun Terbit: 2026
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓