Coherent Manipulation of Thermal Transport by Tunable Electron-Photon and Electron-Phonon Interaction

摘要

We propose a system where coherent thermal transport between two reservoirsin non-galvanic contact is modulated by independently tuning theelectron-photon and the electron-phonon coupling. The scheme is based on twogate-controlled electrodes capacitively coupled through a dc-SQUID asintermediate phase-tunable resonator. Thereby the electron-photon interactionis modulated by controlling the flux threading the dc-SQUID and the impedanceof the two reservoirs, while the electron-phonon coupling is tuned bycontrolling the charge carrier concentration in the electrodes. Toquantitatively evaluate the behavior of the system we propose to exploitgraphene reservoirs. In this case, the scheme can work at temperatures reaching1 K, with unprecedented temperature modulations as large as 245 mK,transmittance up to 99% and energy conversion efficiency up to 50%. Finally,the accuracy of heat transport control allows to use this system as anexperimental tool to determine the electron-phonon coupling in two dimensionalelectronic systems (2DES).