Nonlinear Space-Time Modulation for Exquisite Wavecrafting in Superconducting Quantum Systems

Noisy Intermediate-Scale Quantum Computers require control devices that generate large, coherent, and low-noise signals with minimized hardware overhead, aiming to improve the signal-to-noise ratio. By utilizing nonmagnetic and nonlinear space-time modulation of low-temperature superconductors, we can tap into unique physical phenomena that are beneficial for reducing hardware complexity. Here, we present a space-time-varying cQED system and showcase the exceptional functionalities and wave-tailoring properties that are inherent to structures driven by nonlinearity-based space-time modulation, especially in controlling superconducting transmons.