Reflective Amplification without Population Inversion from a Strongly Driven Superconducting Qubit
Reflective Amplification without Population Inversion from a Strongly Driven Superconducting Qubit
Amplification of optical or microwave fields is often achieved by strongly driving a medium to induce population inversion such that a weak probe can be amplified through stimulated emission. Here we strongly couple a superconducting qubit, an artificial atom, to the field in a semi-infinite waveguide. When driving the qubit …