Experimentally Verified, Fast Analytic, and Numerical Design of Superconducting Resonators in Flip-Chip Architectures

Experimentally Verified, Fast Analytic, and Numerical Design of Superconducting Resonators in Flip-Chip Architectures

Blog Article

In superconducting quantum processors, the predictability of device parameters is of increasing importance as many laboratories scale up their systems to accles and shelvoke larger sizes in a 3-D-integrated architecture.In particular, the properties of superconducting resonators must be controlled well to ensure high-fidelity multiplexed readout of qubits.Here, we present a method, based on conformal mapping techniques, to predict a resonator's parameters directly from its 2-D cross-section, without computationally heavy and time-consuming 3-D simulation.We demonstrate the method's validity by comparing the calculated resonator frequency and coupling quality factor with those obtained through 3-D finite-element-method simulation and by measurement of 15 resonators in a flip-chip-integrated architecture.We achieve a discrepancy hedelm?kori metalli of less than 2% between designed and measured frequencies for 6-GHz resonators.

We also propose a design method that reduces the sensitivity of the resonant frequency to variations in the interchip spacing.