The authors derive a quantum Fisher information formula for non-Hermitian systems that adds a term from the changing state norm, and test it on pseudo-Hermitian and PT-symmetric qubits.
Quantum parameter estimation with optimal control,
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Non-Hermitian effects on the quantum parameter estimation in pseudo-Hermitian systems
The authors derive a quantum Fisher information formula for non-Hermitian systems that adds a term from the changing state norm, and test it on pseudo-Hermitian and PT-symmetric qubits.