Entanglement transfer via Chiral Quantum Walk on a Triangular Chain

TL;DR

This paper explores how chiral quantum walks on a triangular chain can effectively transfer entanglement, comparing their performance to continuous-time quantum walks and analyzing the impact of mixed states on transfer quality.

Contribution

It introduces the use of chiral quantum walks for entanglement transfer on a triangular chain and evaluates their effectiveness against traditional quantum walks.

Findings

Chiral quantum walks enable efficient entanglement transfer.

Transfer quality depends on the initial state purity.

Chiral quantum walks outperform continuous-time quantum walks in transfer speed and fidelity.

Abstract

We investigate the chiral quantum walk (CQW) as a mechanism for an entanglement transfer on a triangular chain structure. We specifically consider two-site spatially entangled cases in short-time and long-time regimes. Using the concurrence as an entanglement measure; fidelity, and the Bures distance as the measure of the quality of the state transfer, we evaluate the success of the entanglement transfer. We compare the entangled state transfer time and quality in CQW against a continuous-time quantum random walk. We also observe the effect of mixed states on the entanglement transfer quality.