Designing a Spin Channel for Perfect Quantum Communication

TL;DR

This paper introduces a method to design spin chains with specific interactions that enable perfect quantum communication, offering flexible options for experimental implementation.

Contribution

It presents a novel scheme for constructing spin channels with fixed symmetry interactions that achieve perfect quantum transmission by tuning interaction parameters based on eigenvalue progression.

Findings

Multiple interaction configurations enable perfect quantum transmission.

The scheme allows customization of spin chains for different transmission times.

Provides a theoretical foundation for experimental quantum communication channels.

Abstract

We propose a scheme for using a spin chain with fixed symmetry interaction as a channel for perfect quantum communication. The perfect quantum communication is determined by the eigenvalues that form a special arithmetical progression, the concrete interaction parameter $J_i$ is obtained as a function of integer and perfect transmission time $t_p$. There are infinite choices of $J_i$ for perfect transmission and one can design the channel according to the requirement of $t_p$. This scheme will provide more choices of spin chain for future experiment in quantum communication.