High-dimensional quantum state transfer through a quantum spin chain

TL;DR

This paper presents a protocol for high-fidelity transfer of high-dimensional quantum states across a spin chain using natural dynamics, enabling efficient entanglement distribution even at finite temperatures.

Contribution

It introduces a high-dimensional quantum state transfer method that operates without external modulation, improving robustness and efficiency over existing protocols.

Findings

High-fidelity transfer of arbitrary high-dimensional states achieved

Entanglement distribution efficiency is significantly improved

Protocol remains effective at finite temperatures with strong fields

Abstract

In this paper, we investigate a high-dimensional quantum state transfer protocol. An arbitrary unknown high-dimensional state can be transferred with high fidelity between two remote registers through a XX coupling spin chain of arbitrary length. The evolution of the state transfer is determined by the natural dynamics of the chain without external modulation and coupling strength engineering. As a consequence, entanglement distribution with high efficiency can be achieved. Also the strong field and high spin quantum number can counteract partly the effect of finite temperature to ensure high fidelity of the protocol when the quantum data bus is in the thermal equilibrium state under an external magnetic field.