Quantum heat valve and entanglement in superconducting $LC$ resonators

TL;DR

This paper demonstrates a quantum heat valve using tunable superconducting resonators and reveals a link between heat current and quantum entanglement, advancing understanding of quantum thermal machines.

Contribution

It introduces a novel heat valve design with tunable coupling in superconducting resonators and explores the role of entanglement in heat transfer.

Findings

Heat valve realized over a wide parameter range.

A relation between heat current and entanglement is established.

Quantum features significantly influence heat transfer in the system.

Abstract

Quantum superconducting circuit with flexible coupler has been a powerful platform for designing quantum thermal machines. In this letter, we employ the tunable coupling of two superconducting resonators to realize a heat valve by modulating magnetic flux using a superconducting quantum interference device (SQUID). It is shown that a heat valve can be realized in a wide parameter range. We find a consistent relation between the heat current and quantum entanglement, which indicates the dominant role of entanglement on the heat valve. It provides an insightful understanding of quantum features in quantum heat machines.