Tunable photonic thermal rectification via superconducting qubit*

The intense studies into superconducting circuit quantum electrodynamics (QED) together with the progress in ultrasensitive nanoscale bolometry provide a unique platform for studying heat transport in the quantum limit. On chip integration of superconducting qubits coupled with superconducting resonators together with the tools of ultra-sensitive microwave bolometry have been considered as promising systems to realize such quantum devices as the recently demonstrated heat valve [1] and rectifier [2]. We will present our recent results of the flux-tunable photonic heat transport between thermal reservoirs coupled via a superconducting artificial atom. To study the possibility of manipulating heat currents and the directionality of photonic heat transport, we couple the Xmon qubit to two asymmetric resonators, and implement a flux-tunable wireless quantum thermal rectifier. We will present spectroscopy results of the resonator-qubit-resonator assembly [3].
[1] A. Ronzani et al, Nature Physics 14, p.991 (2018)
[2] J. Senior et al, arXiv:1908.05574 (2019)
[3] A. Gubaydullin et al, in preparation (2019)