Heat rectification via a superconducting artificial atom

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  • Ulm University


Heat transport control in superconducting circuits has received increasing attention in microwave engineering for circuit quantum electrodynamics, particularly in light of quantum computing. The authors realise of a quantum heat rectifier, a thermal equivalent to the electronic diode, experimentally realising a spin-boson rectifier proposed theoretically.

In developing technologies based on superconducting quantum circuits, the need to control and route heating is a significant challenge in the experimental realisation and operation of these devices. One of the more ubiquitous devices in the current quantum computing toolbox is the transmon-type superconducting quantum bit, embedded in a resonator-based architecture. In the study of heat transport in superconducting circuits, a versatile and sensitive thermometer is based on studying the tunnelling characteristics of superconducting probes weakly coupled to a normal-metal island. Here we show that by integrating superconducting quantum bit coupled to two superconducting resonators at different frequencies, each resonator terminated (and thermally populated) by such a mesoscopic thin film metal island, one can experimentally observe magnetic flux-tunable photonic heat rectification between 0 and 10%.


Original languageEnglish
Article number40
Number of pages5
JournalCommunications physics
Issue number1
Publication statusPublished - 25 Feb 2020
MoE publication typeA1 Journal article-refereed

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