# Information entropic superconducting microcooler

## TL;DR

This paper proposes a superconducting flux qubit-based microrefrigerator that uses adiabatic flux modulation and thermalization to transfer heat, linking quantum information erasure to cooling in a thermodynamically efficient device.

## Contribution

It introduces a novel design for a microcooler that integrates quantum information principles with thermodynamic cooling using superconducting circuits.

## Key findings

- Device operates effectively in realistic experimental conditions.
- Demonstrates the link between quantum erasure and thermodynamic entropy.
- Achieves frequency-selective photonic heat conduction.

## Abstract

We consider a design for a cyclic microrefrigerator using a superconducting flux qubit. Adiabatic modulation of the flux combined with thermalization can be used to transfer energy from a lower temperature normal metal thin film resistor to another one at higher temperature. The frequency selectivity of photonic heat conduction is achieved by including the hot resistor as part of a high frequency LC resonator and the cold one as part of a low-frequency oscillator while keeping both circuits in the underdamped regime. We discuss the performance of the device in an experimentally realistic setting. This device illustrates the complementarity of information and thermodynamic entropy as the erasure of the quantum bit directly relates to the cooling of the resistor.