QFI for entropy in Gibbs states equals 1/C, dual to C/T² for temperature, yielding a Hamiltonian-independent uncertainty relation for their estimators.
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Reaction coordinate mapping shows nonmonotonic current fluctuations and noise below the classical thermodynamic uncertainty bound in a strongly coupled driven qubit, tied to non-Gaussianity and coherence in the reaction coordinate.
Monitoring quanta exchanged with a finite phonon reservoir via a quantum dot achieves optimal temperature-sensing precision through Fisher information in the long-time limit.
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Quantum Fisher Information for Entropy of Gibbs States
QFI for entropy in Gibbs states equals 1/C, dual to C/T² for temperature, yielding a Hamiltonian-independent uncertainty relation for their estimators.
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Current fluctuations in nonequilibrium open quantum systems beyond weak coupling: a reaction coordinate approach
Reaction coordinate mapping shows nonmonotonic current fluctuations and noise below the classical thermodynamic uncertainty bound in a strongly coupled driven qubit, tied to non-Gaussianity and coherence in the reaction coordinate.
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Optimal current-based sensing of phonon temperature using a finite reservoir
Monitoring quanta exchanged with a finite phonon reservoir via a quantum dot achieves optimal temperature-sensing precision through Fisher information in the long-time limit.