Advanced Studies in Nonlinear Dynamical Systems, Dumitru Baleanu,Mustafa Bayram,Aydin Secer, Editör, Springer, London/Berlin , Bern, ss.141-152, 2025
Our research is focused on the improvement of performance for quantum sensing protocols by the control over the quantum Fisher information. We explain the basic mechanism of quantum sensing to compare with the classical approaches and give examples of experimentally realized quantum sensors, and then we present the model Hamiltonian. Also we introduce the general features of quantum sensing protocols and the corresponding experimental setups, and we define the Ramsey interferometry method for superconducting qubits and study the case of the control for the transduction parameter, i.e., for the coupling between the sensing qubits and the detected external field. As a result, we find the quantum analog of the Cramér-Rao lower bound parameter via the Fisher information and investigate its behavior under the controlled coupling. We study the effects of decoherence, but we do not discuss here different noise effects (quantum projections, errors due to the manipulations over the qubit, and readout noise) in detail. To conclude, we discuss the possible further developments of our model.