Autor: Dariusz (dariusj_at_poczta.onet.pl)
Data: Thu 20 Dec 2001 - 20:03:16 MET
http://www.cnn.com/2001/TECH/science/12/20/ibm.quantum.reut/index.html
NEW YORK (Reuters) -- Researchers
at International Business
Machines
Corp. said on Wednesday
they have
demonstrated a calculation
that could
be used to break
complicated codes,
marking a small step in
the advance of
quantum computing, a
technology
based on quantum
mechanics.
IBM scientists will
publish details in the
scientific journal Nature
on Thursday of
the demonstration of
"Shor's Algorithm," a
method of factoring
numbers that was
developed in 1994 by AT&T
scientist
Peter Shor.
It was th at algorithm,
and the promise it
holds for its ability to break large encryption codes,
that spurred interest in quantum
computing in the 1990s.
Quantum computing is one of several paths that
researchers are taking as they
strive to make smaller and smaller microchips. Under
Moore's Law, which was set
forth by Intel Corp. co-founder Gordon Moore, the
number of transistors on a chip
doubles, or alternatively, data density doubles, every
18 months.
IBM said it has built a quantum computer based on seven
atoms which, because of
the physical properties of those atoms, are able to
work together as both the
computer's processor and memory. Previously the largest
computer IBM had built
was based on five atoms.
IBM scientists said that they were able to use the
computer to show that Shor's
algorithm works by correctly identifying 3 and 5 as the
factors of 15.
"Although the answer may appear to be trivial, the
unprecedented control required
... during the calculation made this the most complex
quantum computation
performed to date," Nabil Amer, manager of IBM
Research's physics of
information group said. A quantum computer is based on
the spin of an electron or
atomic nucleus.
To archiwum zostało wygenerowane przez hypermail 2.1.7 : Tue 18 May 2004 - 23:38:01 MET DST