Preservation of entanglement in a two-qubit-spin coupled system

TL;DR

This paper proposes a theoretical method to maintain entanglement in a two-qubit spin system affected by Dzyaloshinskii-Moriya interaction, using periodic operations to achieve high-precision preservation over long times.

Contribution

It introduces a novel scheme employing periodic operations to preserve entanglement in a two-qubit system with DM interaction, regardless of initial state.

Findings

Entanglement can be preserved with high precision over long durations.

The scheme is effective for any initial state.

It addresses the challenge of entanglement decay in spin systems.

Abstract

A theoretical scheme to preserve the entanglement in a two-qubit-spin coupled system in the presence of Dzyaloshinskii-Moriya (DM) anisotropic antisymmetric interaction is proposed. Based on a sequence of operations performed periodically on the system, the scheme can preserve the entanglement of the system starting from any initial state with any high precision for any long duration.