Spin-bath polarization via disentanglement

TL;DR

This paper introduces a novel cooling scheme that uses probe-induced disentanglement to suppress quantum correlations in a spin bath, significantly enhancing its polarization for quantum sensing and information processing.

Contribution

It proposes a modified cooling method employing alternating, non-commuting probe-bath interactions to remove quantum correlation barriers in spin bath polarization.

Findings

Exponential enhancement of spin bath polarization achieved.

Disentanglement suppresses quantum correlations that impede cooling.

Thermodynamic principles have broad implications for quantum technologies.

Abstract

Spin bath polarization is the key to enhancing the sensitivity of quantum sensing and information processing. Significant effort has been invested in identifying the consequences of quantumness and its control for spin-bath polarization. Here, by contrast, we focus on the adverse role of quantum correlations (entanglement) in a spin bath that can impede its cooling in many realistic scenarios. We propose to remove this impediment by modified cooling schemes, incorporating probe-induced disentanglement via alternating, non-commuting probe-bath interactions, so as to suppress the buildup of quantum correlations in the bath. The resulting bath polarization is thereby exponentially enhanced. The underlying thermodynamic principles have far-reaching implications for quantum technological applications