Multi-spin counter-diabatic driving in many-body quantum Otto refrigerators

TL;DR

This paper introduces a finite-time many-body quantum refrigerator utilizing multi-spin counter-diabatic driving, achieving high cooling power and efficiency, and demonstrates its scalability and catalytic nature.

Contribution

It presents a novel many-body quantum refrigerator with multi-spin CD driving that outperforms non-adiabatic methods and analyzes its scaling and catalytic properties.

Findings

Achieves finite cooling power at high COP.

Outperforms non-adiabatic counterparts.

Reveals the catalytic nature of optimal refrigeration.

Abstract

Quantum refrigerators pump heat from a cold to a hot reservoir. In the few-particle regime, counter-diabatic (CD) driving of, originally adiabatic, work-exchange strokes is a promising candidate to overcome the bottleneck of vanishing cooling power. Here, we present a finite-time many-body quantum refrigerator that yields finite cooling power at high coefficient of performance, that considerably outperforms its non-adiabatic counterpart. We employ multi-spin CD driving and numerically investigate the scaling behavior of the refrigeration performance with system size. We further prove that optimal refrigeration via the exact CD protocol is a catalytic process.