Tunable one-dimensional microwave emissions from cyclic-transition three-level atoms

TL;DR

This paper demonstrates tunable microwave emissions from a cyclic three-level artificial atom coupled to a transmission line, enabling controllable on-chip quantum devices like mirrors or switches for microwave signals.

Contribution

It introduces a method to generate and control microwave emissions using a cyclic three-level artificial atom in a one-dimensional setup, with tunability via driving fields.

Findings

Microwave emission intensity is tunable by adjusting Rabi frequencies.

The system can act as a controllable on-chip mirror or switch.

Coherent microwave signals are generated along a transmission line.

Abstract

By strongly driving a cyclic-transition three-level artificial atom, demonstrated by such as a flux-based superconducting circuit, we show that coherent microwave signals can be excited along a coupled one-dimensional transmission line. Typically, the intensity of the generated microwave is tunable via properly adjusting the Rabi frequencies of the applied strong-driving fields or introducing a probe field with the same frequency. In practice, the system proposed here could work as an on-chip quantum device with controllable atom-photon interaction to implement a total-reflecting mirror or switch for the propagating probe field.