Dephasing noise can increase the quantum Fisher information for time and global-field estimation, yielding noise-enhanced quantum clocks and sensors in specific regimes.
However, the state loses coherence as dephasing acts, which leads to a de- crease of both terms in the right-hand side of Eq
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Noise-enhanced quantum clocks and global field sensors
Dephasing noise can increase the quantum Fisher information for time and global-field estimation, yielding noise-enhanced quantum clocks and sensors in specific regimes.