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<DIV>En toen kwam dit:</DIV>
<DIV><A
title=http://webwereld.nl/nieuws/112700/miljoenen-voor-bouw-nederlandse-quantumcomputer.html
href="http://webwereld.nl/nieuws/112700/miljoenen-voor-bouw-nederlandse-quantumcomputer.html">http://webwereld.nl/nieuws/112700/miljoenen-voor-bouw-nederlandse-quantumcomputer.html</A></DIV>
<DIV> </DIV>
<DIV>Hij komt er misschien toch sneller dan we dachten!</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=blazingeclipse@hotmail.com
href="mailto:blazingeclipse@hotmail.com">Corné van Kessel</A> </DIV>
<DIV><B>Sent:</B> Thursday, December 06, 2012 5:57 PM</DIV>
<DIV><B>To:</B> <A title=algemeen@lists.piratenpartij.nl
href="mailto:algemeen@lists.piratenpartij.nl">algemeen@lists.piratenpartij.nl</A>
</DIV>
<DIV><B>Subject:</B> Re: [Algemeen] Persproject quantum computing (Was: Verdacht
DNA?)</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<DIV dir=ltr>Er bestaat overigens ook nog enige discussie of dat die D-Wave wel
daadwerkelijk een quantum computer is. Misschien ook wel relevant om te melden?
<DIV> </DIV>
<DIV>"<SPAN
style="LINE-HEIGHT: 18px; BACKGROUND-COLOR: rgb(255,255,255); FONT-FAMILY: verdana, arial, helvetica, sans-serif; FONT-SIZE: 12px">Unlike
the conventional approach to building quantum computers, D-Wave's philosophy
sidesteps the issue of having to endow the system with a built-in tolerance
against a certain degree of imperfection (an approach known as 'fault-tolerant
computing'). In fact, they argue that noise might actually be a good thing, at
least when using — as the D-Wave team does — heuristic algorithms such as
adiabatic optimization. Allowing noise to enter the system, and stepping back to
see how well the quantum algorithm performs despite all imperfections, might
indeed be a good idea in view of the enormous experimental challenges posed by
maintaining coherence among more than a few interacting quantum
bits.</SPAN><SPAN style="FONT-SIZE: 10pt">"</SPAN></DIV>
<DIV>+</DIV>
<DIV>"<SPAN
style="LINE-HEIGHT: 18px; BACKGROUND-COLOR: rgb(255,255,255); FONT-FAMILY: verdana, arial, helvetica, sans-serif; FONT-SIZE: 12px">Why
then don't we have large-scale quantum computers already? Unfortunately, the
best known thresholds values for tolerable error rates are still very demanding,
between 10</SPAN><SUP
style="BACKGROUND-COLOR: rgb(255,255,255); FONT-FAMILY: verdana, arial, helvetica, sans-serif">-3</SUP><SPAN
style="LINE-HEIGHT: 18px; BACKGROUND-COLOR: rgb(255,255,255); FONT-FAMILY: verdana, arial, helvetica, sans-serif; FONT-SIZE: 12px">
and 10</SPAN><SUP
style="BACKGROUND-COLOR: rgb(255,255,255); FONT-FAMILY: verdana, arial, helvetica, sans-serif">-5</SUP><SPAN
style="LINE-HEIGHT: 18px; BACKGROUND-COLOR: rgb(255,255,255); FONT-FAMILY: verdana, arial, helvetica, sans-serif; FONT-SIZE: 12px">,
depending on the specifics of the architecture. Even the current best
experiments suffer from much higher error rates than that. To bridge the gap
between theory and practice, researchers work from both sides: experimentalists
try to reduce the noise levels of their systems while theorists try to design
better fault-tolerant schemes that allow higher error rates.</SPAN><SPAN
style="FONT-SIZE: 10pt">"</SPAN></DIV>
<DIV><SPAN style="FONT-SIZE: 10pt">bron
(</SPAN>http://www.nature.com/nphys/journal/v3/n4/full/nphys585.html) retrieved
6-12-2012</DIV>
<DIV> </DIV>
<DIV>Die quantum computer lijkt dus (hoewel interessante tech) eerder een
marketing ploy dan een daadwerkelijke quantum computer.</DIV>
<DIV> </DIV>
<DIV>Groet,</DIV>
<DIV>Corné</DIV></DIV>
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