A. Gubaydullin(a), J. Senior(a), B. Karimi(a), A. Ronzani(a), Y.-C. Chang(a), G. Thomasa, D. S. Golubev(a), J.T. Peltonen(1), J. Ankerhold(b) and J.P. Pekola(a)
(a)QTF Centre of Excellence, Department of Applied Physics, Aalto University School of Science, P.O. Box 13500, 00076 Aalto, Finland
(b)Institute for Complex Quantum Systems and IQST, University of Ulm, 89069 Ulm, Germany

We have realized a platform to study and control the photonic heat transport across superconducting circuits. Our proposed circuit contains an Xmon type qubit capacitively coupled to coplanar waveguide resonators forming a resonator-qubit-resonator assembly. To study photonic heat transport the elements of ultra-sensitive microwave bolometry are integrated at the opposite ends of resonators. To characterize the various coupling elements in the system we perform RF spectroscopy [1]. We present recent observations of heat transport in the system with two asymmetric resonators, which show a rectification based on the direction of transport [2]. We propose an implementation scheme of an artificial atom maser [3] and show our recent experimental observations [4].
1. A. Gubaydullin, J. Senior, B. Karimi, Yu-C. Chang, J. T. Peltonen, and J. P. Pekola, Spectroscopy of the two superconducting resonators coupled via Xmon type qubit, submitted.
2. J. Senior, A. Gubaydullin, B. Karimi, J.T. Peltonen, J. Ankerhold, J.P. Pekola, “Heat rectification via a superconducting artificial atom”, Communications Physics 3 (1), 1-5 (2020).
3. G. Thomas, A. Gubaydullin, D.S. Golubev, J.P. Pekola, “Thermally pumped on-chip maser”, Physical Review B 102 (10), 104503 (2020).
4. A. Gubaydullin, G. Thomas, D.S. Golubev, J.P. Pekola, in preparation.