EntangleNet: Theoretical Reestablishment of Entanglement in Quantum Networks †

Mihai-Zicu Mina,Pantelimon Popescu

doi:10.3390/app8101935

Abstract

In the practical context of quantum networks, the most reliable method of transmitting quantum information is via teleportation because quantum states are highly sensitive. However, teleportation consumes a shared maximally entangled state. Two parties Alice and Bob located at separate nodes that wish to reestablish their shared entanglement will not send entangled qubits directly to achieve this goal, but rather employ a more efficient mechanism that ensures minimal time resources. In this paper, we present a quantum routing scheme that exploits entanglement swapping to reestablish consumed entanglement. It improves and generalizes previous work on the subject and reduces the entanglement distribution time by a factor of 4 k in an arbitrary scale quantum network, where N = 4 k - 1 is a required number of quantum nodes located between source and destination. In addition, k is the greatest positive integer considered by Alice or Bob, such that afterwards they choose N quantum switches.

Highlights

Quantum teleportation is a communication protocol introduced by Bennett et al [1] and represents a major result in the field of quantum information
It requires a maximally entangled pair of particles to be shared between source and destination; a crucial aspect of a future large scale quantum network is the task of reliably distributing entanglement to any two nodes in need of exchanging quantum information via teleportation
Function S ELECTAQS (S x, iqs) is an abstract representation of the decision made by X to extract a subset of quantum switches that will be actively involved in pair generation and measurements

Summary

Introduction

Quantum teleportation is a communication protocol introduced by Bennett et al [1] and represents a major result in the field of quantum information It allows perfect transmission of an unknown qubit between two spatially separated parties (whom we shall call Alice and Bob), provided that classical information is exchanged and a previously shared maximally entangled pair of particles exists between them [1,2,3]. Teleportation proves to solve this problem by accurately transmitting a qubit from one place to another, regardless of distance and without any physical transport It requires a maximally entangled pair of particles to be shared between source and destination; a crucial aspect of a future large scale quantum network is the task of reliably distributing entanglement to any two nodes in need of exchanging quantum information via teleportation.

General Context

Our Proposal

Exemplification

Efficiency

EntangleNet Protocol

Conclusions