Josephson Quantum Heat Engine

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 $R_L=10\Omega$.

6 pages, 4 figures

References in corpus (7)

• The Josephson heat interferometer
• Nonequilibrium fluctuations in quantum heat engines: Theory, example, and possible solid state experiments
• Superconductors as ideal spin sources for spintronics
• Information entropic superconducting microcooler
• Proposal for a phase-coherent thermoelectric transistor
• Phase-controlled superconducting heat-flux quantum modulator
• Heat transport and electron cooling in ballistic normal-metal/spin-filter/superconductor junctions

Cited by in corpus (1)

• Autonomous Quantum Refrigerator in a Circuit-QED Architecture Based on a Josephson Junction