Physicists develop a new approach to quantum computing:
Quantum computers counting on carbon nanotubes
Carbon nanotubes can be used as quantum bits for quantum
computers. A study by physicists at the Technische Universitaet Muenchen (TUM)
has shown how nanotubes can store information in the form of vibrations. Up to
now, researchers have experimented primarily with electrically charged
particles. Because nanomechanical devices are not charged, they are much less
sensitive to electrical interference.
Using quantum mechanical phenomena, computers could be much
more powerful than their classical digital predecessors. Scientists all over
the world are working to explore the basis for quantum computing. To date most
systems are based on electrically charged particles that are held in an
"electromagnetic trap." A disadvantage of these systems is that they
are very sensitive to electromagnetic interference and therefore need extensive
shielding. Physicists at the Technische Universitaet Muenchen have now found a
way for information to be stored and quantum mechanically processed in
mechanical vibrations.
Playing a nano-guitar
A carbon nanotube that is clamped at both ends can be
excited to oscillate.