Aziz, F., Niu, Z., Hsieh, T., Lin, K. T., Huang, Y., Lin, Y., Chen, C., Cheng, Y., Hsieh, K., Chen, J., Kockum, A. F., Lin, G., Lin, Z., Wen, P., Hoi, I. (2026). Tunable frequency conversion and comb generation with a superconducting artificial atom. Applied Physics Letters. https://doi.org/10.1063/5.0310058