Browsing by Subject "Josephson junctions"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Open Access Dependence of Josephson junction critical current on the deposition rate of YBa2Cu3O7-δ thin films(American Institute of Physics, 2007) Algül, B. P.; Avcı, İ.; Akram, R.; Bozbey, Ali; Tepe, M.; Abukay, D.We have reported the effect of YBa2Cu3O 7-δ (YBCO) thin film deposition rate on the 24 and 30 degree STO bicrystal Josephson junctions critical currents by fabricating series of junctions with different deposition rates. Dependence of YBCO thin film structures on the deposition rate was investigated. We have observed that the critical currents of junctions are strongly affected by the thin film deposition rate.Item Open Access Study of junction and bias parameters in readout of phase qubits(2012) Zandi H.; Safaei, S.; Khorasani, S.; Fardmanesh, M.The exact numerical solution of the nonlinear Ginzburg-Landau equation for Josephson junctions is obtained, from which the precise nontrivial current density and effective potential of the Josephson junctions are found. Based on the resulting potential well, the tunneling probabilities of the associated bound states are computed which are in complete agreement with the reported experimental data. The effects of junction and bias parameters such as thickness of the insulating barrier, cross sectional area, bias current, and magnetic field are fully investigated using a successive perturbation approach. We define and compute figures of merit for achieving optimal operation of phase qubits and measurements of the corresponding states. Particularly, it is found that Josephson junctions with thicker barriers yield better performance in measurements of phase qubits. The variations of characteristic parameters such as life time of the states due to the above considered parameters are also studied and discussed to obtain the appropriate configuration setup.