IFISC Seminar on Wednesday Sep 28, 2022 at 14:30 Place: IFISC Seminar Room Title: Hybrid normal-superconducting Aharonov-Bohm quantum thermal device Speaker: Gianmichele Blasi, University of Geneva Abstract: <p>In this seminar I will talk about a recent work we published on the arxiv (arXiv:2208.14336).<br /> In this work we propose and theoretically investigate the behavior of a ballistic Aharonov-Bohm (AB) ring when embedded in a N-S two-terminal setup, consisting of a normal metal (N) and superconducting (S) leads. This device is based on available current technologie and we show that it constitutes a promising hybrid quantum thermal device, as quantum heat engine and quantum thermal rectifier. Remarkably, we evidence the interplay of single-particle quantum interferences in the AB ring and of the superconducting properties of the structure to achieve the hybrid operating mode for this quantum device. Its efficiency as a quantum heat engine reaches 55% of the Carnot efficiency, and we predict thermal rectification factor attaining 350%. These predictions make this device highly promising for future phase-coherent caloritronic nanodevices.</p> <p>Presential seminar, with parallel Zoom stream:&nbsp;&nbsp;</p> <p>https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09</p>; Url event:https://ifisc.uib-csic.es/en/events/seminars/hybrid-normal-superconducting-a...