Suppression of decoherence in a generalization of the spin-bath model

TL;DR

This paper generalizes spin-bath models to many-spin systems, analyzing how the ratio of system to bath spins affects decoherence, with implications for quantum information storage.

Contribution

It introduces a generalized model of spin baths with multiple spins, exploring decoherence suppression based on system-bath spin ratios.

Findings

Decoherence depends on the ratio of system to bath spins.

Clusters of particles unaffected by decoherence identified.

Potential for stable quantum information storage.

Abstract

The works on decoherence due to spin baths usually agree in studying a one-spin system in interaction with a large spin bath. In this paper we generalize those models by analyzing a many-spin system and by studying decoherence or its suppression in function of the relation between the numbers of spins of the system and the bath. This model may help to identify clusters of particles unaffected by decoherence, which, as a consequence, can be used to store quantum information.