A spectral-domain volume-integral-equation method is developed for analyzing superconducting planar transmission lines. This method rigorously accounts for the complex conductivity, the finite metallization thickness, and the anisotropy of superconductors. Calculated effective dielectric constants and quality factors for microstrip lines and coplanar waveguides show good agreement with measured...

We propose a theoretical scheme for one-dimensional lattice based on superconducting quantum circuit system consisting of two types microwave cavities, the interaction between nearest-neighbor and next-nearest-neighbor unit cells that can be adjusted by magnetic flux, obtain collective dynamic evolution study topological properties system.First, we investigate energy spectrum edge states odd-ev...

We theoretically model and simulate the dynamics of a hybrid quantum system consisting two non-local ensembles nitrogen-vacancy center superconducting transmon qubit mediated by transmission line resonators. apply time-dependent external field to enhance this system’s speed fidelity function as controlled-phase gate. Our simulation result shows that high-fidelity entangled state NV spins is 92%...

|The nonlinear surface impedance of a thin superconducting strip carrying a microwave current was calculated numerically from rst principles based upon ux penetration due to a current-induced critical state. Our results approaches the analytical results in the appropriate limit. The technique is useful for design of passive superconducting microwave circuits. Keywords| Critical state, Hysteresi...