Distributed thermal tasks on many-body systems through a single quantum machine

TL;DR

This paper introduces a method to control and stabilize local temperatures of many-body quantum systems using a single quantum emitter in a non-equilibrium environment, enabling independent temperature tuning without external couplings.

Contribution

It presents a novel approach to manipulate qubit temperatures via a single quantum machine, advancing quantum thermodynamics and control of many-body systems.

Findings

Independent temperature control of qubits over broad ranges

Dissipative processes suffice for temperature stabilization

Geometric tuning enables precise temperature manipulation

Abstract

We propose a configuration of a single three-level quantum emitter embedded in a non-equilibrium steady electromagnetic environment, able to stabilize and control the local temperatures of a target system it interacts with, consisting of a collection of coupled two-level systems. The temperatures are induced by dissipative processes only, without the need of further external couplings for each qubit. Moreover, by acting on a set of easily tunable geometric parameters, we demonstrate the possibility to manipulate and tune each qubit temperature independently over a remarkably broad range of values. These findings address one standard problem in quantum-scale thermodynamics, providing a way to induce a desired distribution of temperature among interacting qubits and to protect it from external noise sources.