Sunday, September 24, 2023
SCIENMAG: Latest Science and Health News
No Result
View All Result
  • Login
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US
No Result
View All Result
Scienmag - Latest science news from science magazine
No Result
View All Result
Home SCIENCE NEWS Technology and Engineering

Unlocking the gates to quantum computing

March 26, 2016
in Technology and Engineering
0
Share on FacebookShare on Twitter
IMAGE

Researchers from Griffith University and the University of Queensland have overcome one of the key challenges to quantum computing by simplifying a complex quantum logic operation. They demonstrated this by experimentally realising a challenging circuit — the quantum Fredkin gate — for the first time.

"The allure of quantum computers is the unparalleled processing power that they provide compared to current technology," said Dr Raj Patel from Griffith's Centre for Quantum Dynamics.

"Much like our everyday computer, the brains of a quantum computer consist of chains of logic gates, although quantum logic gates harness quantum phenomena."

The main stumbling block to actually creating a quantum computer has been in minimising the number of resources needed to efficiently implement processing circuits.

"Similar to building a huge wall out lots of small bricks, large quantum circuits require very many logic gates to function. However, if larger bricks are used the same wall could be built with far fewer bricks," said Dr Patel.

"We demonstrate in our experiment how one can build larger quantum circuits in a more direct way without using small logic gates."

At present, even small and medium scale quantum computer circuits cannot be produced because of the requirement to integrate so many of these gates into the circuits. One example is the Fredkin (controlled- SWAP) gate. This is a gate where two qubits are swapped depending on the value of the third.

Usually the Fredkin gate requires implementing a circuit of five logic operations. The research team used the quantum entanglement of photons — particles of light — to implement the controlled-SWAP operation directly.

"There are quantum computing algorithms, such as Shor's algorithm for factorising prime numbers, that require the controlled-SWAP operation.

The quantum Fredkin gate can also be used to perform a direct comparison of two sets of qubits (quantum bits) to determine whether they are the same or not. This is not only useful in computing but is an essential feature of some secure quantum communication protocols where the goal is to verify that two strings, or digital signatures, are the same," said Professor Tim Ralph from the University of Queensland.

Professor Geoff Pryde, from Griffith's Centre for Quantum Dynamics, is the project's chief investigator.

"What is exciting about our scheme is that it is not limited to just controlling whether qubits are swapped, but can be applied to a variety of different operations opening up ways to control larger circuits efficiently," said Professor Pryde.

"This could unleash applications that have so far been out of reach."

###

The team is part of the Australian Research Council's Centre for Quantum Computation and Communication Technology, an effort to exploit Australia's strong expertise in developing quantum information technologies.

The research has been published as A quantum Fredkin gate in Science Advances (DOI:10.1126/sciadv.1501531)

Media Contact

Helen Wright
helen.wright@griffith.edu.au
047-840-6565
@Griffith_Uni

http://www.griffith.edu.au

Share25Tweet16Share4ShareSendShare
  • blank

    Null results research now published by major behavioral medicine journal

    1038 shares
    Share 415 Tweet 260
  • New findings on hair loss in men

    68 shares
    Share 27 Tweet 17
  • Tirzepatide more effective in blood sugar control and body weight loss than semaglutide, shows meta-analysis of 22 studies

    64 shares
    Share 26 Tweet 16
  • Astronomers discover newborn galaxies with the James Webb Space Telescope

    64 shares
    Share 26 Tweet 16
  • Chromosome-scale genome sequence of Suaeda glauca sheds light on salt stress tolerance in halophytes

    63 shares
    Share 25 Tweet 16
  • ISSCR Kicks off São Paulo International Symposium today in Ribeirão Preto, Brazil

    64 shares
    Share 26 Tweet 16
ADVERTISEMENT

About us

We bring you the latest science news from best research centers and universities around the world. Check our website.

Latest NEWS

Null results research now published by major behavioral medicine journal

Corning® launches Videodrop, revolutionizing real-time nanoparticle detection and analysis

Grant awarded to University of Louisville law professor will fund climate adaptation project

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 208 other subscribers

© 2023 Scienmag- Science Magazine: Latest Science News.

No Result
View All Result
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US

© 2023 Scienmag- Science Magazine: Latest Science News.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In