Microwave storage and retrieval are essential capabilities for superconducting quantum circuits. Here, we demonstrate an on-chip multimode resonator in which strong parametric modulation induces a large and tunable normal-mode splitting that enables microwave storage. When the spectral bandwidth of a short microwave pulse covers the two dressed-state absorption peaks, part of the pulse is absorbed and undergoes coherent energy exchange between the modes, producing a clear time-domain beating signal. By switching off the modulation before the beating arrives, we realize on-demand storage and retrieval, demonstrating an alternative approach to microwave photonic quantum memory. This parametric-normal-mode-splitting protocol offers a practical route toward a controllable quantum-memory mechanism in superconducting circuits.
@article{arxiv.2512.15087,
title = {Coherent transfer via parametric control of normal-mode splitting in a superconducting multimode resonator},
author = {Kai-I Chu and Xiao-Cheng Lu and Hsin Chang and Wei-Cheng Hung and Jing-Yang Chang and Jeng-Chung Chen and Chii-Dong Chen and Yung-Fu Chen},
journal= {arXiv preprint arXiv:2512.15087},
year = {2025}
}