Perfect Entanglement Transport in Quantum Spin Chain Systems

TL;DR

This paper introduces a method for perfect long-distance entanglement transfer in anti-ferromagnetic quantum spin chains using adiabatic quantum pumping, supported by analytical and physical explanations.

Contribution

It presents a novel mechanism for perfect entanglement transport in AFM spin chains via adiabatic quantum pumping, with analytical conditions and physical insights.

Findings

Achieves perfect entanglement transfer over long distances.

Identifies conditions for blocking entanglement transport.

Explains why AFM chains outperform ferromagnetic chains.

Abstract

We propose a mechanism for perfect entanglement transport in anti-ferromagnetic (AFM) quantum spin chain systems with modulated exchange coupling along the xy plane and in the z direction. We use the principle of adiabatic quantum pumping process for entanglement transfer in the spin chain systems. In our proposed mechanism, perfect entanglement transfer can be achieved over an arbitraly long distance. We explain analytically and physically why the entanglement hops in alternate sites. We solve this problem by using the Berry phase analysis and Abelian bosonization methods. We find the condition for blocking of entanglement transport even in the perfect pumping condition. We also explain physically why entanglement transfer in AFM chain out performs the ferromagnetic chain. Our analytical solution interconnects quantum many body physics and quantum information science.