Directional Coupling for Quantum Computing and Communication

TL;DR

This paper introduces the concept of directional coupling in quantum systems, enabling selective state transfer between quantum wires, with analysis based on an analogy to composite spin systems, advancing quantum communication and computing.

Contribution

It presents a novel concept of directional coupling for quantum wires, providing a new approach for state transfer in quantum computing and communication.

Findings

Directional coupling enables selective quantum state transfer.

Mathematical analogy to composite spin systems facilitates analysis.

Potential applications in quantum communication networks.

Abstract

We introduce the concept of directional coupling, i.e., the selective transfer of a state between adjacent quantum wires, in the context of quantum computing and short-distance communication. Our analysis rests upon a mathematical analogy between a dual-channel directional coupler and a composite spin system.