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Latest Quantum computer Stories

2010-07-01 12:02:29

Since Richard Feynman's first envisioned the quantum computer in 1982, there have been many studies of potential candidates -- computers that use quantum bits, or qubits, capable of holding an more than one value at a time and computing at speeds far beyond existing silicon-based machines for certain problems. Most of these candidate systems, such as atoms and semiconducting quantum dots, work for quantum computing, but only at very low temperatures. Now a team of researchers from the Wuhan...

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2010-06-23 14:18:17

The remarkable ability of an electron to exist in two places at once has been controlled in the most common electronic material "“ silicon - for the first time. The research findings - published in Nature by a UK-Dutch team from the University of Surrey, UCL (University College) London, Heriot-Watt University in Edinburgh, and the FOM Institute for Plasma Physics near Utrecht - marks a significant step towards the making of an affordable "quantum computer". According to the research...

2010-06-22 08:00:00

CAMBRIDGE, Mass., June 22, 2010 /PRNewswire/ -- Raytheon Company's (NYSE: RTN) BBN Technologies has achieved a major advance in quantum information technology with the coupling of light and superconductors. The achievement is described in a paper, "Direct Observation of Coherent Population Trapping in a Superconducting Artificial Atom," that was recently published in Physical Review Letters. Written by three Raytheon BBN physicists, William R. Kelly, Zachary Dutton, and Thomas A. Ohki,...

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2010-06-07 13:56:45

Any physical system - be it an electron, a molecule of water, a virus, a human being, a whole planet "“ is characterized at each moment in time distinctively and specifically in a specific place by particular characteristics. This is what we call the "state of the system", but when one tries to describe said "state" precisely according to our current knowledge of the laws governing the universe, it is necessary to appeal to abstract formulations since the laws of quantum physics, the...

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2010-06-03 07:54:10

For most people, frustration is a condition to be avoided. But for scientists studying certain "frustrated" ensembles of interacting components "“ that is, those which cannot settle into a state that minimizes each interaction "“ it may be the key to understanding a host of puzzling phenomena that affect systems from neural networks and social structures to protein folding and magnetism. Frustration has typically been extremely difficult to study because even systems with...

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2010-05-26 10:09:48

Despite a steady improvement in the speed of conventional computers during the last few decades, certain types of problems remain computationally difficult to solve. Quantum computers hold the promise of offering a new route to solving some classes of these problems, such as breaking encryptions. The tremendous computing power of these devices stems from their use of quantum systems, called "qubits," which can exist in a "superposition" of two states at the same time "“ in stark...

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2010-05-24 12:40:00

On Monday, Australian scientists unveiled the world's smallest electronic switch measuring just a few atoms, which will shrink microchips and revolutionize computing speeds. The seven-atom transistor is the first step in a "quantum computer" which will make calculations millions of times faster than existing devices. Michelle Simmons, the lead researcher, said the technology has major implications for code breaking, financial transactions and weather forecasting, which involve testing...

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2010-05-11 12:54:04

McGill researchers make important contribution to the development of quantum computing Physicists at McGill University have developed a system for measuring the energy involved in adding electrons to semi-conductor nanocrystals, also known as quantum dots "“ a technology that may revolutionize computing and other areas of science. Dr. Peter Grtter, McGill's Associate Dean of Research and Graduate Education, Faculty of Science, explains that his research team has developed a cantilever...

2010-05-02 08:57:39

A team of scientists at UC Santa Barbara that helped pioneer research into the quantum properties of a small defect found in diamonds has now used cutting-edge computational techniques to produce a road map for studying defects in alternative materials. Their new research is published in the online edition of the Proceedings of the National Academy of Sciences (PNAS), and will soon be published in the print edition of the journal. The findings may enable new applications for semiconductors...

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2010-04-28 09:40:18

Scientists at the National Institute of Standards and Technology (NIST) have developed the first "dimmer switch" for a superconducting circuit linking a quantum bit (qubit) and a quantum bus"”promising technologies for storing and transporting information in future quantum computers. The NIST switch is a new type of control device that can "tune" interactions between these components and potentially could speed up the development of a practical quantum computer. Quantum computers, if...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.