Control over Quantum Fisher Information for Superconducting Qubit-based Sensors

Borısenok S.

7th International Conference on Mathematics “An Istanbul Meeting for World Mathematicians”, İstanbul, Türkiye, 11 - 13 Temmuz 2023, ss.89-100

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: İstanbul
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.89-100
  • Abdullah Gül Üniversitesi Adresli: Evet

Özet

Our research is focused on the improvement of performance for quantum sensing protocols by the control over the quantum Fisher information. We investigate 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. We explain the basic mechanism of quantum sensing to compare with the classical approaches and give examples of experimentally realized quantum sensors, then we present the model Hamiltonian, find the quantum analog of the Cramér-Rao lower bound parameter via the Fisher information, and investigate its behavior under the controlled coupling. To conclude, we discuss the possible further developments of our model.

Keywords: Quantum sensing, superconducting qubits, . Ramsey interferometry, Fisher information, transduction parameter control.