Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > News > What is a qbit?

April 6th, 2010

What is a qbit?

Abstract:
By Roy Johnson

Quantum computing is based on different mathematics and different hardware from conventional, binary computing.

Quantum computers already exist, in one form or another, and they work with qbits, not the usual 1/0 bits. A qbit is, mathematically, a state vector in a two-level quantum system or a vector that applies to complex numbers. Putting it simply and practically, a qbit can have the value 1,0 or both. In quantum language the simultaneous 1/0 value is called a superposition.

It seems impossible to use something that doesn't have a rigidly fixed and measureable value. It conjures up scary memories of the Heisenberg Uncertainty Principle and the Schrodinger's Cat problem.

In fact, we do know the maths that enable us to work with qbits - it's basically a matter of probabilities. If you think of the traditional 1/0 values as a sphere, 1 being the north pole and 0 being the south pole, the possible states of a qbit - determined by probability amplitude - will fall on the surface of that sphere.

Quantum states also have the unique property of entanglement. This is a non-local property of quantum states (qbits, for example) whereby two sets will have higher correlation than is possible in classical mathematics. Simply and somewhat inaccurately expressed, this allows quantum machines to work quickly on problems that a conventional machine can solve - but only with impossible time scales.

Source:
mybroadband.co.za

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Possible Futures

Simulations predict flat liquid May 21st, 2015

Nature inspires first artificial molecular pump: Simple design mimics pumping mechanism of life-sustaining proteins found in living cells May 19th, 2015

NNCO and Museum of Science Fiction to Collaborate on Nanotechnology and 3D Printing Panels at Awesome Con May 19th, 2015

Quantum 'gruyères' for spintronics of the future: Topological insulators become a little less 'elusive' May 12th, 2015

Quantum Computing

Researchers discover 'swing-dancing' pairs of electrons: Findings set the stage for room-temperature superconductivity and the transformation of high-speed rail, quantum computers May 14th, 2015

Researchers build new fermion microscope: Instrument freezes and images 1,000 individual fermionic atoms at once May 13th, 2015

Quantum 'gruyères' for spintronics of the future: Topological insulators become a little less 'elusive' May 12th, 2015

Magic wavelengths: Tuning up Rydberg atoms for quantum information applications May 12th, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project