The quantum Fisher information is reformulated as the connected symmetrized covariance of a time-integrated action deformation or as an insertion of the action derivative in the propagator within a path integral framework.
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2 Pith papers cite this work. Polarity classification is still indexing.
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quant-ph 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
Introduces cumulant-based quantum relative Rényi functional with proven properties on its domain and a regularized version that vanishes exactly when states commute.
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Path Integral Approach to Quantum Fisher Information
The quantum Fisher information is reformulated as the connected symmetrized covariance of a time-integrated action deformation or as an insertion of the action derivative in the propagator within a path integral framework.
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Cumulant-based quantum relative R\'enyi functional
Introduces cumulant-based quantum relative Rényi functional with proven properties on its domain and a regularized version that vanishes exactly when states commute.