News tagged with quantum computing
Quantum leap: World's smallest transistor built with just 7 atoms
(PhysOrg.com) -- Scientists have literally taken a leap into a new era of computing power by making the world's smallest precision-built transistor - a "quantum dot" of just seven atoms in a single silicon ...
May 24, 2010 |
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Quantum measurement precision approaches Heisenberg limit
(PhysOrg.com) -- In the classical world, scientists can make measurements with a degree of accuracy that is restricted only by technical limitations. At the fundamental level, however, measurement precision ...
Feb 26, 2010 |
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Scientists isolate, hold, photograph individual Rubidium 85 atom
(PhysOrg.com) -- In a major physics breakthrough, University of Otago scientists have developed a technique to consistently isolate and capture a fast-moving neutral atom - and have also seen and photographed ...
Oct 01, 2010 |
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Single-atom transistor is 'perfect'
In a remarkable feat of micro-engineering, UNSW physicists have created a working transistor consisting of a single atom placed precisely in a silicon crystal.
Feb 19, 2012 |
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Physicists Show Theory of Quantum Mechanics Applies to the Motion of Large Objects
(PhysOrg.com) -- Researchers at UC Santa Barbara have provided the first clear demonstration that the theory of quantum mechanics applies to the mechanical motion of an object large enough to be seen by the ...
Mar 17, 2010 |
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Quantum computing may actually be useful, after all
(PhysOrg.com) -- In recent years, quantum computers have lost some of their luster. In the 1990s, it seemed that they might be able to solve a class of difficult but common problems — the so-called NP-complete ...
Oct 09, 2009 |
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Quantum non-demolition measurement allows physicists to count photons without destroying them
(PhysOrg.com) -- In a way, the quantum world seems to know when it's being watched. When physicists make measurements on photons and other quantum-scale particles, the measurements always disturb the system ...
Jul 09, 2010 |
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Physicists Solve Difficult Classical Problem with One Quantum Bit
(PhysOrg.com) -- Quantum information algorithms have the potential to solve some problems exponentially faster than current classical methods. However, most research on quantum information systems has concentrated ...
Jan 08, 2010 |
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Solving big problems with new quantum algorithm
(PhysOrg.com) -- In a recently published paper, Aram Harrow at the University of Bristol and colleagues from MIT in the United States have discovered a quantum algorithm that solves large problems much faster ...
Nov 09, 2009 |
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First-ever calculation performed on optical quantum computer chip
(PhysOrg.com) -- A primitive quantum computer that uses single particles of light (photons) whizzing through a silicon chip has performed its first mathematical calculation. This is the first time a calculation ...
Sep 03, 2009 |
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Physicists Propose New Method for Quantum Computing
(PhysOrg.com) -- The new system, which can compute faster and more efficiently than previous quantum computers, may bring the technology closer to reality.
Jun 15, 2010 |
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Physicists investigate fate of five-dimensional black strings
(PhysOrg.com) -- While black holes in four-dimensional space-time are stable and can persist for a long time, their higher-dimensional analogues are usually unstable. One such theoretical analogue is a five-dimensional ...
Sep 10, 2010 |
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Quantum computers may be much easier to build than previously thought: study
Quantum computers should be much easier to build than previously thought, because they can still work with a large number of faulty or even missing components, according to a study published today in Physical Re ...
Nov 09, 2010 |
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Quantum age edges closer
(PhysOrg.com) -- The arrival of superfast quantum computing is closer following recent breakthroughs by an international team led by UNSW researchers.
Jan 05, 2010 |
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Decorated with Electric Current, Nanoribbons Align with Expectations
(PhysOrg.com) -- A bizarre substance predicted to shrink electronics and give quantum physicists a new tabletop toy behaves pretty much as its designers expected.
Nanotechnology / Nanomaterials
Jan 27, 2010 |
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Quantum computer
A quantum computer is a device for computation that makes direct use of quantum mechanical phenomena, such as superposition and entanglement, to perform operations on data. The basic principle behind quantum computation is that quantum properties can be used to represent data and perform operations on these data.
Although quantum computing is still in its infancy, experiments have been carried out in which quantum computational operations were executed on a very small number of qubits (quantum binary digits). Both practical and theoretical research continues with interest, and many national government and military funding agencies support quantum computing research to develop quantum computers for both civilian and national security purposes, such as cryptanalysis.
If large-scale quantum computers can be built, they will be able to solve certain problems much faster than any of our current classical computers (for example Shor's algorithm). Quantum computers are different from other computers such as DNA computers and traditional computers based on transistors. Some computing architectures such as optical computers may use classical superposition of electromagnetic waves. Without some specifically quantum mechanical resources such as entanglement, it is conjectured that an exponential advantage over classical computers is not possible.
For more information about Quantum computer, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
