# Swift heat transfer by fast-forward driving in open quantum systems

## TL;DR

This paper introduces fast-forward protocols for rapid thermalization in open quantum systems, enabling high-power Otto engine operation and efficient cooling by controlling system parameters.

## Contribution

It adapts counter-diabatic and Floquet methods to open systems, providing a novel approach for swift thermalization and energy exchange.

## Key findings

- Fast protocols achieve rapid thermalization with minimal dissipation.
- High-power Otto engine operates near Carnot efficiency using these protocols.
- Design principles for swift cooling in many-body systems are proposed.

## Abstract

Typically, time-dependent thermodynamic protocols need to run asymptotically slowly in order to avoid dissipative losses. By adapting ideas from counter-diabatic driving and Floquet engineering to open systems, we develop fast-forward protocols for swiftly thermalizing a system oscillator locally coupled to an optical phonon bath. These protocols control the system frequency and the system-bath coupling to induce a resonant state exchange between the system and the bath. We apply the fast-forward protocols to realize a fast approximate Otto engine operating at high power near the Carnot Efficiency. Our results suggest design principles for swift cooling protocols in coupled many-body systems.