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...read
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Quantum
Computing - Kwantumcomputer
- Quantencomputer
www.nano-Tsunami.com
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Sham
spin in nanotube acts as real spin - New insight
for quantum computing
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Schematic
set-up of the experiment: a nanotube between two
electrodes, in order to feed electrons into the
nanotube.
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At
the Technical University of Delft, researchers created
electrons with an artifical spin. Yet, this spin acts
as a real quantum spin. This finding is of importance
for the development of quantum computers and quantum
information processing.
At the Kavli Institute of the Technical University of
Delft, Pablo Jarillo-Herrero and colleagues had electrons
spiral their way up -or down- around carbon nanotubes.
The spiral movement causes the electron to spin around,
according to the principles of classical mechanics.
This gives them an angular momentum.
When electrons are properly located in an atom (instead
of running around a nanotube), they also have spin,
always. This spin is quantised, has only a fixed magnitude
and only two directions: up or down. At very low temperatures,
spin results in a phenomenon called the Kondo-effect.
At
the Kavli Institute, the researchers found that the
"sham spins" of their spiralling electrons
could show the Kondo-effect too. This weird but intrigueing
result gives valuable knowledge that can be of use
for the development of computers of the future. In
quantum computers, the binary valued spins form the
bits, quantum bits.
The
researchers will publish their results in Nature of
24 March 2005.
More
information:
http://www.fom.nl
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The
Kondo-effect of spiralling electrons. The red resonance
peak is split into eight resonances: four for the
real spin and four for the \"sham\" spin. |
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The
supplied electrons make a left-hand or right-hand
movement around the nanotube. |
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This
story has been adapted from a news release -
Diese Meldung basiert auf einer Pressemitteilung -
Deze
tekst is gebaseerd op een nieuwsbericht - |
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