Derives QFI duality F_Q(w^T θ) + F_Q(v^T θ) ≤ N for orthogonal unit vectors w, v in N-qubit states, with equality cases for equatorial and GHZ states, implying privacy when precision saturates the Heisenberg limit.
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OH molecule proposed as quantum probe for joint electric and magnetic field estimation, with optimized stationary and dynamical protocols that address incompatibility and show temperature effects on error.
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Precision and Privacy in Distributed Quantum Sensing: A Quantum Fisher Information Duality
Derives QFI duality F_Q(w^T θ) + F_Q(v^T θ) ≤ N for orthogonal unit vectors w, v in N-qubit states, with equality cases for equatorial and GHZ states, implying privacy when precision saturates the Heisenberg limit.
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OH molecule as a quantum probe to jointly estimate electric and magnetic fields
OH molecule proposed as quantum probe for joint electric and magnetic field estimation, with optimized stationary and dynamical protocols that address incompatibility and show temperature effects on error.