Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
share
Email Facebook Twitter Google+ LinkedIn Comments

High-Dimensional Optical Cluster States Could Enable One-Way Quantum Computing

Photonics.com
Dec 2018
QUEBEC CITY, Canada, Dec. 4, 2018 — Using a compact optical platform, a research team at Institut National De La Recherche Scientifique (INRS) has generated a high-dimensional, d-level cluster state and has used it to perform quantum computing operations. According to the researchers, the platform they have developed is capable of generating quantum states with complexities sufficient to achieve one-way quantum computing objectives.

By judiciously designing the quantum state of photons, it is possible to increase the information storage capacity of qubits to obtain the so-called qudits used by the researchers. By grouping the qudits into clusters, the researchers achieved high-dimensional, one-way quantum computing operations, where processing was performed through measurements.

The INRS team, led by professor Roberto Morandotti, characterized and tested the noise sensitivity of 3-level, 4-partite cluster states formed by two photons in the time and frequency domain. The researchers confirmed genuine multipartite entanglement with higher noise robustness compared to conventional 2-level cluster states. They performed proof-of-concept high-dimensional one-way quantum operations, where the cluster states were transformed into orthogonal, maximally entangled d-level 2-partite states by means of projection measurements.

Professor José Azaña said photons present an advantage over other approaches to quantum processing: “They are used to transmit information via optical fibers in existing telecommunications systems. That means photons with controlled quantum properties can also travel through these same channels without losing their attributes.”

The team’s scalable approach is based on integrated photonic chips and optical fiber communication components. The compact system is made from commercially available components and is compatible with existing electronics and telecommunications technologies. The generation of cluster states based on subsystems that have more than two dimensions, that is, d-level cluster states, could increase quantum resources and also enable novel algorithms.

The research was published in Nature Physics (doi: https://doi.org/10.1038/s41567-018-0347-x).

GLOSSARY
quantum optics
The area of optics in which quantum theory is used to describe light in discrete units or "quanta" of energy known as photons. First observed by Albert Einstein's photoelectric effect, this particle description of light is the foundation for describing the transfer of energy (i.e. absorption and emission) in light matter interaction.
integrated photonicsoptical chipsoptical fiber communicationsResearch & TechnologyeducationInstitut National de la Recherche ScientifiqueINRSAmericaslight sourcesphotonsquantum opticsCommunicationsquantum communicationsmicro resonatormicroresonator

Comments
Terms & Conditions Privacy Policy About Us Contact Us
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2018 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, info@photonics.com

Photonics Media, Laurin Publishing
x We deliver – right to your inbox. Subscribe FREE to our newsletters.
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.