Under independent Markovian pure dephasing, superradiance-based DC magnetometry retains O(1/N) scaling in the measurement-noise-dominated regime and suffers only a constant-factor degradation in the large-N limit, unlike GHZ-based sensing.
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Analysis of Superradiance-Based Quantum Metrology under Independent Markovian Pure Dephasing
Under independent Markovian pure dephasing, superradiance-based DC magnetometry retains O(1/N) scaling in the measurement-noise-dominated regime and suffers only a constant-factor degradation in the large-N limit, unlike GHZ-based sensing.