Modular non-Hermitian systems enrich skin effect and bulk-boundary breakdown while enhancing sensing performance near spectral topological phase transitions, including multi-parameter cases.
Journey in quantum metrology and sensing from foundations to applications: a review
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abstract
We present a review on quantum metrology and sensing, from its foundations to current applications. Highlights of the review include consideration of both frequentist and Bayesian approaches to parameter estimation; single as well as multiparameter estimation; estimation for different encoding processes comprising unitary as well as noisy channels, quantum thermometry, and channels involving indefinite causal order; different estimation strategies incorporating also recent advances like quantum error correction-aided methods and reservoir engineering; usefulness of quantum Fisher information to detect resources; applications of quantum metrology in diverse arenas covering quantum many-body sensors, sensing protocols in atomic ensembles, atom-photon systems, and continuous-variable systems, quantum imaging, quantum illumination, atomic clocks and atom interferometry, etc; and experimental realizations of quantum sensors in different physical platforms.
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quant-ph 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
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Modular non-Hermitian topology and its application to critical sensing
Modular non-Hermitian systems enrich skin effect and bulk-boundary breakdown while enhancing sensing performance near spectral topological phase transitions, including multi-parameter cases.