Navigation Links
Optical chip enables new approach to quantum computing
Date:9/16/2010

This release is available in Greek, Italian, Japanese and Chinese.

An international research group led by scientists from the University of Bristol has developed a new approach to quantum computing that could soon be used to perform complex calculations that cannot be done by today's computers.

Scientists from Bristol's Centre for Quantum Photonics have developed a silicon chip that could be used to perform complex calculations and simulations using quantum particles in the near future. The researchers believe that their device represents a new route to a quantum computer a powerful type of computer that uses quantum bits (qubits) rather than the conventional bits used in today's computers.

Unlike conventional bits or transistors, which can be in one of only two states at any one time (1 or 0), a qubit can be in several states at the same time and can therefore be used to hold and process a much larger amount of information at a greater rate.

"It is widely believed that a quantum computer will not become a reality for at least another 25 years," says Professor Jeremy O'Brien, Director of the Centre for Quantum Photonics. "However, we believe, using our new technique, a quantum computer could, in less than ten years, be performing calculations that are outside the capabilities of conventional computers."

The technique developed in Bristol uses two identical particles of light (photons) moving along a network of circuits in a silicon chip to perform an experiment known as a quantum walk. Quantum walk experiments using one photon have been done before and can even be modelled exactly by classical wave physics. However, this is the first time a quantum walk has been performed with two particles and the implications are far-reaching.

"Using a two-photon system, we can perform calculations that are exponentially more complex than before," says Prof O'Brien. "This is very much the beginning of a new field in quantum information science and will pave the way to quantum computers that will help us understand the most complex scientific problems."

In the short term, the team expect to apply their new results immediately for developing new simulation tools in their own lab. In the longer term, a quantum computer based on a multi-photon quantum walk could be used to simulate processes which themselves are governed by quantum mechanics, such as superconductivity and photosynthesis.

"Our technique could improve our understanding of such important processes and help, for example, in the development of more efficient solar cells," adds Prof O'Brien. Other applications include the development of ultra-fast and efficient search engines, designing high-tech materials and new pharmaceuticals.

The leap from using one photon to two photons is not trivial because the two particles need to be identical in every way and because of the way these particles interfere, or interact, with each other. There is no direct analogue of this interaction outside of quantum physics.

"Now that we can directly realize and observe two-photon quantum walks, the move to a three-photon, or multi-photon, device is relatively straightforward, but the results will be just as exciting" says Prof O'Brien. "Each time we add a photon, the complexity of the problem we are able to solve increases exponentially, so if a one-photon quantum walk has 10 outcomes, a two-photon system can give 100 outcomes and a three-photon system 1000 solutions and so on."

The group, which includes researchers from Tohoku University, Japan, the Weizmann Institute in Israel and the University of Twente in the Netherlands, now plans to use the chip to perform quantum mechanical simulations. The researchers are also planning to increase the complexity of their experiment not only by adding more photons but also by using larger circuits.


'/>"/>

Contact: Aliya Mughal
Aliya.Mughal@bristol.ac.uk
University of Bristol
Source:Eurekalert  

Related biology technology :

1. An optical traffic cop for rapid communication
2. Small optical force can budge nanoscale objects
3. Reportlinker Adds Worldwide Optical, Transmission TEM, and Scanning SEM Electron Microscope Market Shares, Strategies, and Forecasts, 2009 to 2015
4. New nanolaser key to future optical computers and technologies
5. Shamir Optical Industry Ltd. Announces Availability of Its Annual Report on Form 20-F Through Its Website
6. Finesse Demonstrates TruFluor(TM) pH, a Single-Use Optical pH Sensor and Transmitter
7. Nanoscale dimensioning is fast, cheap with new NIST optical technique
8. New research field promises radical advances in optical technologies
9. Paperwork: Buckypapers clarify electrical, optical behavior of nanotubes
10. SpectraScience Awarded Patent for Its Optical Biopsy System and Methods for Tissue Diagnosis
11. University of Pennsylvania scientists move optical computing closer to reality
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Optical chip enables new approach to quantum computing
(Date:10/12/2017)... (PRWEB) , ... October 12, ... ... ) has launched Rosalind™, the first-ever genomics analysis platform specifically designed for ... complexity. Named in honor of pioneering researcher Rosalind Franklin, who made a ...
(Date:10/11/2017)... ... October 11, 2017 , ... The ... endogenous context, enabling overexpression experiments and avoiding the use of exogenous expression plasmids. ... is transformative for performing systematic gain-of-function studies. , This complement to loss-of-function ...
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is ... and 8th June 2018 in San Francisco, CA. The Summit brings together current and ... distinguished CEOs, board directors and government officials from around the world to address key ...
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading ... a nationwide oncology Clinical Nurse Educator (CNE) network, which will ... need for communication among health care professionals to enhance the ... nurses, office staff, and other health care professionals to help ... breast cancer. ...
Breaking Biology Technology:
(Date:6/14/2017)... June 15, 2017  IBM (NYSE: IBM ) is introducing ... event dedicated to developing collaboration between startups and global businesses, ... 15-17. During the event, nine startups will showcase the solutions ... various industries. France ... market, with a 30 percent increase in the number of ...
(Date:5/16/2017)...  Veratad Technologies, LLC ( www.veratad.com ), an innovative ... verification solutions, announced today they will participate as a ... thru May 17, 2017, in Washington D.C.,s ... Identity impacts the lives of billions ... evolving digital world, defining identity is critical to nearly ...
(Date:5/6/2017)... 5, 2017 RAM Group , ... new breakthrough in biometric authentication based on a ... properties to perform biometric authentication. These new sensors are ... created by Ram Group and its partners. This sensor ... supply chains and security. Ram Group is a ...
Breaking Biology News(10 mins):