Quasiparticle dynamics in Andreev bound states part 2: photon interactions

We measure the dynamics of quasiparticles trapped in the Andreev Bound States (ABS) of a fully superconducting aluminum nanobridge Josephson junction under the influence of microwave drive tones. We observe enhanced excitation of quasiparticles when the junction is driven and observe both expected and anomalous dependence on the drive power. We analyze our results in the context of a junction with multiple ABS and find evidence for inter-ABS transitions.