New optical device brings quantum computing a step closer

December 10, 2018, Australian National University
Credit: CC0 Public Domain

An international team of researchers has taken a big step closer to creating an optical quantum computer, which has the potential to engineer new drugs and optimise energy-saving methods.

The research team developed the first optical microchip to generate, manipulate and detect a particular state of light called squeezed vacuum, which is essential for computation. An optical microchip has most of the basic functionality required for creating future quantum computers.

Griffith University in Queensland led the project in collaboration with the University of Munster in Germany, The Australian National University (ANU) and the University of New South Wales-Canberra, supported by the ARC Centre of Excellence for Quantum Computation and Communication Technology.

Co-researcher Professor Elanor Huntington, Dean of the ANU College of Engineering and Computer Science, and program manager for the ARC Centre of Excellence for Quantum Computation and Communication Technology, was thrilled with this significant advancement.

 "What we have demonstrated with this device is an important technological step towards making an optical quantum , which will solve certain problems much faster than today's computers," Professor Huntington said.

The microchip - which is 1.5cm wide, 5cm long and 0.5cm thick - has components inside that interact with light in different ways. These components are connected by tiny channels called waveguides that guide the light around the , in a similar way that wires connect different parts of an electric circuit.

Associate Professor Mirko Lobino from Griffith University said the research team was working towards the next generation of optical microchips required for practical quantum computers.

"Aside from being able to engineer new drugs and materials, and improve energy-saving methods, optical will enable ultra-fast database searches and help solve difficult mathematical problems in many different fields," he said.

Dr Francesco Lenzini from the University of Munster, who is the lead author of the team's Science Advances paper, said the research overcame one of the major challenges to making an optical quantum computer.

"This experiment is the first to integrate three of the basic steps needed for an optical quantum computer, which are the generation of quantum states of light, their manipulation in a fast and reconfigurable way, and their detection," he said.

Explore further: Tiny camera lens may help link quantum computers to network

Related Stories

Controlling photons with a photon

June 28, 2018

Photons are considered to be ideal information carriers and expected to play important roles in quantum communication and information processing, where quantum mechanics allows for absolutely secure cryptographic key distribution ...

Recommended for you

Coffee-based colloids for direct solar absorption

March 22, 2019

Solar energy is one of the most promising resources to help reduce fossil fuel consumption and mitigate greenhouse gas emissions to power a sustainable future. Devices presently in use to convert solar energy into thermal ...

Physicists reveal why matter dominates universe

March 21, 2019

Physicists in the College of Arts and Sciences at Syracuse University have confirmed that matter and antimatter decay differently for elementary particles containing charmed quarks.

ATLAS experiment observes light scattering off light

March 20, 2019

Light-by-light scattering is a very rare phenomenon in which two photons interact, producing another pair of photons. This process was among the earliest predictions of quantum electrodynamics (QED), the quantum theory of ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.