A review of perfect quantum state transfer, from one to two and three dimensional arrays of qubits

TL;DR

This review discusses methods for perfect quantum state transfer in 2D and 3D qubit arrays, emphasizing routing quantum states across layers with high fidelity, relevant for multi-layer quantum chip development.

Contribution

It provides a detailed overview of perfect quantum state transfer techniques in multi-dimensional qubit arrays, highlighting routing methods for unknown states across layers.

Findings

Routing quantum states between layers with unit fidelity.

Applicable to multi-layer quantum chip architectures.

Accessible presentation for readers with basic quantum mechanics knowledge.

Abstract

In the light of recent advances in fabricating single layer quantum chips and a possible road toward development of multi-layer quantum chips, we review, in a detailed way, the subject of quantum state transfer with particular emphasis on perfect quantum state transfer in two and three dimensional lattices. We show how one can route an unknown quantum state from one node in a single layer of a quantum chip to another one on another layer with unit fidelity. Our method of presentation in this review allows the reader with a modest background in quantum mechanics to grasp the essential ideas and methods of this important branch of quantum information theory.