Accurate modeling of flux quantization in superconducting circuits using Keysight Quantum Circuit Simulation

As the pursuit of enhancing qubit readout fidelity progresses, leveraging parametric amplification to boost the signal-to-noise ratio at qubit outputs becomes essential. In this talk, we introduce Keysight Quantum Circuit Simulation, an integrated platform equipped with the necessary tools for modeling complex nonlinear quantum circuits. This platform includes Josephson junctions and inductor components that account for flux quantization in the frequency domain, enabling DC, S-parameter, and harmonic balance simulations on various SQUID circuits, such as SNAILs, snakes, and fluxoniums. By accurately simulating flux quantization, this circuit environment facilitates the creation of more reliable and efficient superconducting quantum circuits.