Experimental simulation of daemonic work extraction in open quantum batteries on a digital quantum computer

TL;DR

This paper demonstrates how to simulate and optimize daemonic work extraction in open quantum batteries using IBM quantum computers, combining theoretical modeling with experimental implementation to approach the maximum possible work extraction.

Contribution

It introduces a quantum circuit implementation of daemonic work extraction in open quantum batteries and experimentally verifies the protocol on a digital quantum computer.

Findings

Experimental values close to theoretical daemonic ergotropy

Optimizing feedback improves work extraction

Noise modeling enhances protocol performance

Abstract

The possibility of extracting more work from a physical system thanks to the information obtained from measurements has been a topic of fundamental interest in the context of thermodynamics since the formulation of the Maxwell's demon thought experiment. We here consider this problem from the perspective of an open quantum battery interacting with an environment that can be continuously measured. By modeling it via a continuously monitored collisional model, we show how to implement the corresponding dynamics as a quantum circuit, including the final conditional feedback unitary evolution that allows to enhance the amount of work extracted. By exploiting the flexibility of IBM quantum computers and by properly modelling the corresponding quantum circuit, we experimentally simulate the work extraction protocol showing how the obtained experimental values of the daemonic extracted work are close to their theoretical upper bound quantified by the so-called daemonic ergotropy. We also demonstrate how by properly modelling the noise affecting the quantum circuit, one can improve the work extraction protocol by optimizing the corresponding extraction unitary feedback operation.