Enhancing the precision of measurements in double quantum dot systems via transmission line resonator. (June 2017)

• Record Type: Journal Article
• Authors: Berrada, K.
• Is Part Of: Chaos, solitons and fractals. Volume 99(2017)
• Page Start: 2
• Page End: 6
• Publication Date: 2017-06
• Subjects: Double quantum dot systems -- Spin qubits -- Measurements -- Transmission line resonator,; Chaotic behavior in systems -- Periodicals; Solitons -- Periodicals; Fractals -- Periodicals; Chaotic behavior in systems; Fractals; Solitons; Periodicals; 003.7
• DOI: 10.1016/j.chaos.2017.03.029
• Languages: English
• ISSNs: 0960-0779

Abstract

Abstract: Recently, various quantum physical systems have been suggested to control the precision of quantum measurements. Here, we propose a useful quantum system to enhance the precision of the parameter estimation by investigating the problem of estimation in double quantum dot (DQD) spin qubits by considered a transmission line resonator (TLR) as a bus system. To do this, we study the dynamical variation of the quantum Fisher information (QFI) in this scheme including the influence of the different physical parameters. We show that the amount of QFI has a small decay rate in the time and it can be controlled by adjusting the magnetic coupling between DQDs via TLR, initial parameters, and detuning parameter between the qubit system and TLR. These features make DQDs via TLR good candidates for implementation of schemes of quantum computation and coherent information processing.