Experimental demonstration of a measurement-based realisation of a quantum channel

W Mccutcheon,A Mcmillan,M S Tame,J G Rarity

doi:10.1088/1367-2630/aa9b5c

Abstract

We introduce and experimentally demonstrate a method for realising a quantum channel using the measurement-based model. Using a photonic setup and modifying the basis of single-qubit measurements on a four-qubit entangled cluster state, representative channels are realised for the case of a single qubit in the form of amplitude and phase damping channels. The experimental results match the theoretical model well, demonstrating the successful performance of the channels. We also show how other types of quantum channels can be realised using our approach. This work highlights the potential of the measurement-based model for realising quantum channels which may serve as building blocks for simulations of realistic open quantum systems.

Highlights

We introduce and experimentally demonstrate a method for realising a quantum channel using the measurement-based model
In our work we address this issue by introducing and experimentally demonstrating a method for the realisation of a quantum channel that can be used to represent the dynamics of a realistic quantum system using the measurement-based model
We find an efficient mapping from the circuit model to the measurement-based model for the simulation, which allows us to consider the use of an entangled linear cluster state of only four qubits made from three photons – using the polarisation degree of freedom of each photon as a qubit and the path degree of freedom of one of the photons as an additional qubit

Summary

Introduction

We introduce and experimentally demonstrate a method for realising a quantum channel using the measurement-based model. We find an efficient mapping from the circuit model to the measurement-based model for the simulation, which allows us to consider the use of an entangled linear cluster state of only four qubits made from three photons – using the polarisation degree of freedom of each photon as a qubit and the path degree of freedom of one of the photons as an additional qubit.

Results

Conclusion