Synthesizing and multiplexing autonomous quantum coherences

TL;DR

This paper introduces a novel method for autonomous quantum coherence synthesis and multiplexing in spin systems coupled to bosonic baths, overcoming previous back-action limitations for quantum technology applications.

Contribution

It proposes a new approach that avoids back-action limits, enabling non-perturbative synthesis and multiplexing of quantum coherence from multiple bosonic baths.

Findings

Overcomes back-action limitations in quantum coherence generation.

Enables non-perturbative synthesis in spin-boson systems.

Proposes a framework for multiplexing quantum coherence.

Abstract

Quantum coherence is a crucial prerequisite for quantum technologies. Therefore, the robust generation, as autonomous as possible, of quantum coherence remains the essential problem for developing this field. We consider a method of synthesizing and multiplexing quantum coherence from spin systems without any direct drives only coupled to bosonic baths. The previous studies in this field have demonstrated that a back-action of the bath to the spin subsystem is important to generate it, however, it simultaneously gives significant limits to the generated coherence. We propose a viable approach with the bosonic bath that allows overcoming these limits by avoiding the destructive effect of the back-action processes. Using this approach, we suggest an advanced synthesis of the quantum coherence non-perturbatively in the spin-boson coupling parameters of multiple bosonic baths to increase and multiplex it for upcoming proof-of-principle experiments.