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Quantum Complexity Computational Theory
Simple broadband signal detection at the fundamental limit
arXiv
Authors: Anthony M. Polloreno, Graeme Smith
Year
2026
Paper ID
3251
Status
Preprint
Abstract Read
~2 min
Abstract Words
70
Citations
N/A
Abstract
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.
Why This Paper Matters
- This paper contributes to the Quantum Complexity & Computational Theory research area in the Quantum Articles archive.
- It adds a 2026 reference point for readers tracking recent quantum research.
- Broadband detection of a weak oscillatory field with unknown carrier frequency underlies magnetometry, axion searches and gravitational-wave sensing.
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