Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Quantum algorithm breakthrough

25.02.2013
The team implemented the 'phase estimation algorithm' — a central quantum algorithm which achieves an exponential speedup over all classical algorithms.

It lies at the heart of quantum computing and is a key sub-routine of many other important quantum algorithms, such as Shor's factoring algorithm and quantum simulations.

Dr Xiao-Qi Zhou, who led the project, said: "Before our experiment, there had been several demonstrations of quantum algorithms, however, none of them implemented the quantum algorithm without knowing the answer in advance. This is because in the previous demonstrations the quantum circuits were simplified to make it more experimentally feasible.

However, this simplification of circuits required knowledge of the answer in advance. Unlike previous demonstrations, we built a full quantum circuit to implement the phase estimation algorithm without any simplification. We don't need to know the answer in advance and it is the first time the answer is truly calculated by a quantum circuit with a quantum algorithm."

Professor Jeremy O'Brien, director of the Centre for Quantum Photonics at the University of Bristol said: "Implementing a full quantum algorithm without knowing the answer in advance is an important step towards practical quantum computing. It paves the way for important applications, including quantum simulations and quantum metrology in the near term, and factoring in the long term."

The research is published in Nature Photonics.
Paper
'Calculating unknown eigenvalues with a quantum algorithm' by Xiao-Qi Zhou, Pruet Kalasuwan, Timothy C. Ralph and Jeremy L. O'Brien in Nature Photonics.

Hannah Johnson | EurekAlert!
Further information:
http://www.bristol.ac.uk

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Anzeige

Anzeige

Event News

BrainScaleS Conference: From Neurobiology to New Computer Architectures

25.09.2014 | Event News

17th European Health Forum Gastein: “Electing Health – The Europe We Want”

23.09.2014 | Event News

Future questions regarding data processing

22.09.2014 | Event News

 
Latest News

Engineers complete first comprehensive mesh-free numerical simulation of skeletal muscle tissue

01.10.2014 | Medical Engineering

All directions are not created equal for nanoscale heat sources

01.10.2014 | Power and Electrical Engineering

Long-acting insulin is safer, more effective for patients with Type 1 diabetes

01.10.2014 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>