Featured Research

from universities, journals, and other organizations

Physicists demonstrate quantum integrated circuit that implements quantum von Neumann architecture

Date:
September 2, 2011
Source:
University of California - Santa Barbara
Summary:
A new paradigm in quantum information processing has been demonstrated. Physicists have developed a quantum integrated circuit that implements the quantum von Neumann architecture. In this architecture, a long-lived quantum random access memory can be programmed using a quantum central processing unit, all constructed on a single chip, providing the key components for a quantum version of a classical computer.

The quantum von Neumann machine: Two qubits are coupled to a quantum bus, realizing a quCPU. Each qubit is accompanied by a quantum memory as well as a zeroing register. The quantum memories together with the zeroing register realize the quRAM.
Credit: Peter Allen, UCSB

A new paradigm in quantum information processing has been demonstrated by physicists at UC Santa Barbara.

Their results are published online in the journal Science.

The UCSB physicists have developed a quantum integrated circuit that implements the quantum von Neumann architecture. In this architecture, a long-lived quantum random access memory can be programmed using a quantum central processing unit, all constructed on a single chip, providing the key components for a quantum version of a classical computer.

The UCSB hardware is based on superconducting quantum circuits, and must be cooled to very low temperatures to display quantum behavior. The architecture represents a new paradigm in quantum information processing, and shows that quantum large-scale-integration is within reach.

The quantum integrated circuit includes two quantum bits (qubits), a quantum communication bus, two bits of quantum memory, and a resetting register comprising a simple quantum computer. "Computational steps take a few billionths of a second, comparable to a classical computer, but the great power is that a quantum computer can perform a large number of calculations simultaneously," said Matteo Mariantoni, postdoctoral fellow in the Department of Physics. "In our new UCSB architecture we have explored the possibility of writing quantum information to memory, while simultaneously performing other quantum calculations.

"On the quantum von Neumann architecture, we were able to run the quantum Fourier transform and a three-qubit Toffoli gate -- key quantum logic circuits for the further development of quantum computing," said Mariantoni.

The UCSB experiment was pursued primarily by Mariantoni, under the direction of Andrew N. Cleland and John M. Martinis, both professors of physics. Mariantoni was supported in this work by an Elings Prize Fellowship in Experimental Science from UCSB's California NanoSystems Institute.


Story Source:

The above story is based on materials provided by University of California - Santa Barbara. Note: Materials may be edited for content and length.


Journal Reference:

  1. Matteo Mariantoni, H. Wang, T. Yamamoto, M. Neeley, Radoslaw C. Bialczak, Y. Chen, M. Lenander, Erik Lucero, A. D. O'Connell, D. Sank, M. Weides, J. Wenner, Y. Yin, J. Zhao, A. N. Korotkov, A. N. Cleland, John M. Martinis. Implementing the Quantum von Neumann Architecture with Superconducting Circuits. Science, 2011; DOI: 10.1126/science.1208517

Cite This Page:

University of California - Santa Barbara. "Physicists demonstrate quantum integrated circuit that implements quantum von Neumann architecture." ScienceDaily. ScienceDaily, 2 September 2011. <www.sciencedaily.com/releases/2011/09/110901155259.htm>.
University of California - Santa Barbara. (2011, September 2). Physicists demonstrate quantum integrated circuit that implements quantum von Neumann architecture. ScienceDaily. Retrieved September 29, 2014 from www.sciencedaily.com/releases/2011/09/110901155259.htm
University of California - Santa Barbara. "Physicists demonstrate quantum integrated circuit that implements quantum von Neumann architecture." ScienceDaily. www.sciencedaily.com/releases/2011/09/110901155259.htm (accessed September 29, 2014).

Share This



More Computers & Math News

Monday, September 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Facebook Ad Platform Goes Where You Go On The Web

New Facebook Ad Platform Goes Where You Go On The Web

Newsy (Sep. 29, 2014) Called Atlas, the platform allows advertisers to place ads based on Facebook info on sites outside of Facebook. Video provided by Newsy
Powered by NewsLook.com
Google Tightens Requirements For Android Manufacturers

Google Tightens Requirements For Android Manufacturers

Newsy (Sep. 27, 2014) Phonemakers who want to use Google’s software in their devices will have to stick to more stringent requirements. Video provided by Newsy
Powered by NewsLook.com
Yahoo's Directory Is Closing, But Where's The Send-Off?

Yahoo's Directory Is Closing, But Where's The Send-Off?

Newsy (Sep. 27, 2014) Yahoo plans to retire its directory at the end of 2014. The Yahoo Directory was once the most popular way to find content on the Internet. Video provided by Newsy
Powered by NewsLook.com
Why The FAA Allows Choice Production Companies To Fly Drones

Why The FAA Allows Choice Production Companies To Fly Drones

Newsy (Sep. 26, 2014) The Federal Aviation Administration says choice production companies can fly unmanned drones without an FAA certificate as long as they play it safe. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins