Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Paper discusses circuitry for quantum computing

24.10.2002



The next radically different means of information processing will be quantum computing, which researchers say will use the principles of quantum mechanics to perform complex calculations in a fraction of the time needed by the world’s fastest supercomputers.

A paper published recently in Physical Review Letters (Nov. 4 issue) has proposed an experimentally realizable circuit and an efficient scheme to implement scalable quantum computing. The ability to scale up the technology from the one or two-qubit experiments that are common in the laboratory to systems involving many qubits is what will finally make it possible to actually build a quantum computer.

"Scalable quantum computing with Josephson charge qubits," was written by Franco Nori of the University of Michigan Physics Department and the Institute of Physical and Chemical Research (RIKEN) and two colleagues, J.Q. You from RIKEN and J.S. Tsai from RIKEN and the NEC Fundamental Research Laboratories.



Quantum computing is very different from the standard computers used today. Today’s computers process information using bits, each one equal to either 0 or 1. Quantum information processing uses quantum versions of these bits, individual atoms or subatomic particles called qubits. These qubits can be equal to 0, to1, or even both 0 and 1 at the same time. The ability to manipulate these superpositions of 0 and 1 is what will allow quantum computers to process complex information so quickly, since any given qubit can occupy either position.

In order to implement quantum information technology, it will be necessary to prepare, manipulate and measure the fragile quantum state of a system. "The first steps in this field have mostly focused on the study of single qubits," Nori said. "But constructing a large quantum computer will mean scaling up to very many qubits, and controlling the connectivity between them. These are two of the major stumbling blocks to achieving practical quantum computing and we believe our method can efficiently solve these two central problems. In addition, a series of operations are proposed for achieving efficient quantum computations.

"We have proposed a way to solve a central problem in quantum computing - how to select two qubits, among very many, and make them interact with each other, even though they might not be nearest neighbors, as well as how to perform efficient quantum computing operations with them," Nori said. Diagrams illustrating the operation of the system can be seen at http://www.umich.edu/~newsinfo/Releases/2002/Oct02/img/micro2.gif


A copy of the paper (no. 197902) can be found here. For more information, contact Franco Nori at nori@umich.edu or visit www.physics.lsa.umich.edu/nea/ and www.riken.go.jp/.

The University of Michigan
News Service
412 Maynard
Ann Arbor, MI 48109-1399

Web: www.umich.edu/~newsinfo

Judy Steeh | EurekAlert!
Further information:
http://ojps.aip.org/dbt/dbt.jsp?KEY=PRLTAO&Volume=89&Issue=19
http://www.physics.lsa.umich.edu/nea/
http://www.riken.go.jp/

More articles from Information Technology:

nachricht Marine Skin dives deeper for better monitoring
23.04.2019 | King Abdullah University of Science & Technology (KAUST)

nachricht CubeSats prove their worth for scientific missions
17.04.2019 | American Physical Society

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Quantum gas turns supersolid

Researchers led by Francesca Ferlaino from the University of Innsbruck and the Austrian Academy of Sciences report in Physical Review X on the observation of supersolid behavior in dipolar quantum gases of erbium and dysprosium. In the dysprosium gas these properties are unprecedentedly long-lived. This sets the stage for future investigations into the nature of this exotic phase of matter.

Supersolidity is a paradoxical state where the matter is both crystallized and superfluid. Predicted 50 years ago, such a counter-intuitive phase, featuring...

Im Focus: Explosion on Jupiter-sized star 10 times more powerful than ever seen on our sun

A stellar flare 10 times more powerful than anything seen on our sun has burst from an ultracool star almost the same size as Jupiter

  • Coolest and smallest star to produce a superflare found
  • Star is a tenth of the radius of our Sun
  • Researchers led by University of Warwick could only see...

Im Focus: Quantum simulation more stable than expected

A localization phenomenon boosts the accuracy of solving quantum many-body problems with quantum computers which are otherwise challenging for conventional computers. This brings such digital quantum simulation within reach on quantum devices available today.

Quantum computers promise to solve certain computational problems exponentially faster than any classical machine. “A particularly promising application is the...

Im Focus: Largest, fastest array of microscopic 'traffic cops' for optical communications

The technology could revolutionize how information travels through data centers and artificial intelligence networks

Engineers at the University of California, Berkeley have built a new photonic switch that can control the direction of light passing through optical fibers...

Im Focus: A long-distance relationship in femtoseconds

Physicists observe how electron-hole pairs drift apart at ultrafast speed, but still remain strongly bound.

Modern electronics relies on ultrafast charge motion on ever shorter length scales. Physicists from Regensburg and Gothenburg have now succeeded in resolving a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Revered mathematicians and computer scientists converge with 200 young researchers in Heidelberg!

17.04.2019 | Event News

First dust conference in the Central Asian part of the earth’s dust belt

15.04.2019 | Event News

Fraunhofer FHR at the IEEE Radar Conference 2019 in Boston, USA

09.04.2019 | Event News

 
Latest News

Marine Skin dives deeper for better monitoring

23.04.2019 | Information Technology

Geomagnetic jerks finally reproduced and explained

23.04.2019 | Earth Sciences

Overlooked molecular machine in cell nucleus may hold key to treating aggressive leukemia

23.04.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>