<p>D-wave computer werkt:<br>
<a href="http://www.gizmag.com/harvard-d-wave-quantum-computer/25558/">http://www.gizmag.com/harvard-d-wave-quantum-computer/25558/</a></p>
<p>mrNatural</p>
<div class="gmail_quote">On Dec 6, 2012 9:14 p.m., "Frank" <<a href="mailto:frank87@xs4all.nl">frank87@xs4all.nl</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>Of de marketing werkt ...<br>
<br>
Op 6-12-2012 19:46, Michiel Dulfer schreef:<br>
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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" target="_blank">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> </div>
<div style="BACKGROUND:#f5f5f5">
<div><b>From:</b> <a title="blazingeclipse@hotmail.com" href="mailto:blazingeclipse@hotmail.com" target="_blank">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" target="_blank">algemeen@lists.piratenpartij.nl</a>
</div>
<div><b>Subject:</b> Re: [Algemeen] Persproject quantum
computing (Was: Verdacht DNA?)</div>
</div>
</div>
<div> </div>
</div>
<div style="font-size:small;font-style:normal;text-decoration:none;font-family:'Calibri';display:inline;font-weight:normal">
<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;font-size:12px;font-family:verdana,arial,helvetica,sans-serif">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;font-size:12px;font-family:verdana,arial,helvetica,sans-serif">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="font-family:verdana,arial,helvetica,sans-serif">-3</sup><span style="line-height:18px;font-size:12px;font-family:verdana,arial,helvetica,sans-serif"> and 10</span><sup style="font-family:verdana,arial,helvetica,sans-serif">-5</sup><span style="line-height:18px;font-size:12px;font-family:verdana,arial,helvetica,sans-serif">, 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><a href="http://www.nature.com/nphys/journal/v3/n4/full/nphys585.html" target="_blank">http://www.nature.com/nphys/journal/v3/n4/full/nphys585.html</a>)
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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