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arXiv · 1607.02850

Josephson Quantum Heat Engine

G. Marchegiani·P. Virtanen·F. Giazotto·M. Campisi
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Abstract

The design of a mesoscopic self-oscillating heat engine that works thanks to purely quantum effects is presented. The proposed scheme is amenable to experimental implementation with current state-of-the-art nanotechnology and materials. One of the main features of the structure is its versatility: The engine can deliver work to a generic load without galvanic contact. This makes it a promising building block for low-temperature on-chip energy management applications. The heat engine consists of a circuit featuring a thermoelectric element based on a ferromagnetic insulator-superconductor tunnel junction and a Josephson weak link that realizes a purely quantum DC/AC converter. This enables contactless transfer of work to the load (a generic RL circuit). The performance of the heat engine is investigated as a function of the thermal gradient applied to the thermoelectric junction. Power up to $1$ pW can be delivered to a load $R_L=10\ Ω$.

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G. Marchegiani, P. Virtanen, F. Giazotto, M. Campisi. 2016-07-13. Josephson Quantum Heat Engine. https://doi.org/10.1103/physrevapplied.6.054014

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