Experimental investigation of a quantum Otto heat engine with shortcuts to adiabaticity implemented using counter-adiabatic driving

TL;DR

This paper experimentally demonstrates a quantum Otto heat engine using NMR technology, showing that shortcuts to adiabaticity significantly improve performance by overcoming the efficiency-power trade-off.

Contribution

It introduces an experimental implementation of a quantum Otto engine with shortcut-to-adiabaticity, including cost analysis, on an NMR platform, which is a novel application.

Findings

Significant performance improvement with shortcuts to adiabaticity

Comparison of efficiency metrics including shortcut costs

Experimental validation of theoretical predictions

Abstract

The finite time operation of a quantum Otto heat engine leads to a trade-off between efficiency and output power, which is due to the deviation of the system from the adiabatic path. This trade-off caveat can be bypassed by using the shortcut-to-adiabaticity protocol. We experimentally implemented a quantum Otto heat engine using spin-1/2 nuclei on a nuclear magnetic resonance (NMR) quantum processor. We investigated its performance using the shortcut-to-adiabaticity technique via counter-adiabatic driving with the inclusion of the cost to perform the shortcut. We use two different metrics that incorporate the cost of shortcut-to-adiabaticity to define engine efficiency and experimentally analyze which one is more appropriate for the NMR platform. We found a significant improvement in the performance of the quantum Otto heat engine driven by shortcut-to-adiabaticity, as compared to the non-adiabatic heat engine.