Probing a hybrid channel for the dynamics of non-local features

TL;DR

This paper introduces a hybrid quantum channel combining thermal, magnetic, and local effects, demonstrating its ability to better preserve quantum correlations and optimize entanglement in two-qubit systems, with implications for quantum information processing.

Contribution

The study presents a novel hybrid channel model that enhances quantum correlation preservation and identifies optimal parameters for entanglement, surpassing individual channel components.

Findings

Hybrid channel outperforms individual components in preserving quantum correlations.

Optimal parameters enable maximum entanglement even with local dephasing.

Quantum features like non-Markovianity show distinct behaviors in the hybrid channel.

Abstract

Effective information transmission is a central element in quantum information protocols, but the quest for optimal efficiency in channels with symmetrical characteristics remains a prominent challenge in quantum information science. In light of this challenge, we introduce a hybrid channel that encompasses thermal, magnetic, and local components, each simultaneously endowed with characteristics that enhance and diminish quantum correlations. To investigate the symmetry of this hybrid channel, we explore the quantum correlations of a simple two-qubit Heisenberg spin state, quantified using measures such as negativity, $\ell_1$-norm coherence, entropic uncertainty, and entropy functions. Our findings reveal that the hybrid channel can be adeptly tailored to preserve quantum correlations, surpassing the capabilities of its individual components. We also identify optimal parameterizations to attain maximum entanglement from mixed-entangled/separable states, even in the presence of local dephasing. Notably, various parameters and quantum features, including non-Markovianity, exhibit distinct behaviors in the context of this hybrid channel. Ultimately, we discuss potential experimental applications of this configuration.