Year: 2026
Type: article
Abstract: We investigate the power spectral density emitted by a superconducting artificial atom coupled to the end of a semi-infinite transmission line and driven by two continuous radio frequency fields. In this setup, we observe the generation of multiple frequency peaks and the formation of frequency combs with equal detuning between those peaks. The frequency peaks originate from wave mixing of the drive fields, mediated by the artificial atom, highlighting the potential of this system as both a frequency converter and a frequency-comb generator. We demonstrate precise control and tunability in generating these frequency features, aligning well with theoretical predictions, across a relatively wide frequency range (tens of MHz, exceeding the linewidth of the artificial atom). The extensive and simple tunability of this frequency converter and comb generator, combined with its small physical footprint, makes it promising for quantum optics on chips and other applications in quantum technology.
Source: Applied Physics Letters
DOI: 10.1063/5.0310058
Institutions: City University of Hong Kong, National Tsing Hua University, Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology, National Taiwan University, Chalmers University of Technology, National Center for Theoretical Sciences, National Center for Theoretical Sciences, Physics Division, National Chung Cheng University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7167478208