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	<title>Comments on: Paul Kwiat on quantum computation</title>
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	<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/</link>
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		<title>By: Foundational Questioners Announced &#124; Cosmic Variance</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12705</link>
		<dc:creator>Foundational Questioners Announced &#124; Cosmic Variance</dc:creator>
		<pubDate>Mon, 31 Jul 2006 19:09:59 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12705</guid>
		<description>[...] It&#8217;s a very good list, and Anthony and Max Tegmark are to be congratulated for funding some very interesting science. If anything, I could see almost all of these proposals receiving money from the NSF or DOE or NASA, although perhaps it might have been more difficult. We see well-known string theorists (for example Steve Giddings, Brian Greene, Eva Silverstein), early-universe cosmologists (Richard Easther, Alex Vilenkin), late-universe astrophysicists (Fred Adams, Avi Loeb), general relativists (Justin Khoury, Ken Olum), loop-quantizers (Olaf Dreyer, Fotini Markopoulou), respectable physicists taking the opportunity to be a little more speculative than usual (Louis Crane, Janna Levin), and even some experimentalists working on the foundations of quantum mechanics (Markus Aspelmeyer, former guest-poster Paul Kwiat), as well as a bunch of others. [...] </description>
		<content:encoded><![CDATA[<p>[...] It&#8217;s a very good list, and Anthony and Max Tegmark are to be congratulated for funding some very interesting science. If anything, I could see almost all of these proposals receiving money from the NSF or DOE or NASA, although perhaps it might have been more difficult. We see well-known string theorists (for example Steve Giddings, Brian Greene, Eva Silverstein), early-universe cosmologists (Richard Easther, Alex Vilenkin), late-universe astrophysicists (Fred Adams, Avi Loeb), general relativists (Justin Khoury, Ken Olum), loop-quantizers (Olaf Dreyer, Fotini Markopoulou), respectable physicists taking the opportunity to be a little more speculative than usual (Louis Crane, Janna Levin), and even some experimentalists working on the foundations of quantum mechanics (Markus Aspelmeyer, former guest-poster Paul Kwiat), as well as a bunch of others. [...] </p>
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		<title>By: Count Iblis</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12704</link>
		<dc:creator>Count Iblis</dc:creator>
		<pubDate>Tue, 13 Jun 2006 16:07:31 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12704</guid>
		<description>&lt;a href=&quot;http://arxiv.org/abs/quant-ph/0606092&quot; rel=&quot;nofollow&quot;&gt;The limits of counterfactual computation&lt;/a&gt;

&lt;blockquote&gt;We show that the protocol recently proposed by Hosten et al. does not allow all possible results of a computation to be obtained counterfactually, as was claimed. It only gives a counterfactual outcome for one of the computer outputs. However, we confirm the observation that the protocol gives some protection against decoherence. In some situations, though, it may be more effective simply to run the computer several times.
&lt;/blockquote&gt;</description>
		<content:encoded><![CDATA[<p><a href="http://arxiv.org/abs/quant-ph/0606092" rel="nofollow">The limits of counterfactual computation</a></p>
<blockquote><p>We show that the protocol recently proposed by Hosten et al. does not allow all possible results of a computation to be obtained counterfactually, as was claimed. It only gives a counterfactual outcome for one of the computer outputs. However, we confirm the observation that the protocol gives some protection against decoherence. In some situations, though, it may be more effective simply to run the computer several times.
</p></blockquote>
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		<title>By: Waleed Alrodhan - Information Security Blog ãÏæäÉ æáíÏ ÇáÑæÖÇä áÃãä ÇáãÚáæãÇÊ &#187; Blog Archive &#187; Future computers based on &#8220;Quantum Computing&#8221; will work even when they&#8217;re off!!</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12703</link>
		<dc:creator>Waleed Alrodhan - Information Security Blog ãÏæäÉ æáíÏ ÇáÑæÖÇä áÃãä ÇáãÚáæãÇÊ &#187; Blog Archive &#187; Future computers based on &#8220;Quantum Computing&#8221; will work even when they&#8217;re off!!</dc:creator>
		<pubDate>Thu, 30 Mar 2006 23:20:38 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12703</guid>
		<description>[...] You can find more interesting facts in this article: Press Here [...] </description>
		<content:encoded><![CDATA[<p>[...] You can find more interesting facts in this article: Press Here [...] </p>
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		<title>By: Plato</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12689</link>
		<dc:creator>Plato</dc:creator>
		<pubDate>Fri, 10 Mar 2006 19:20:07 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12689</guid>
		<description>Layman wondering.

Would Ingoing/outgoing states on the horizon would be a wonderfull thing to be able to read?

Maybe a way in which to use the olympics(onion view in calorimetric perspective)? Of course, I tend to think of entangled states but at such energies?

Who has gotten the closest? Glast maybe? LHC?:)Maybe something happens with superfluid states that was unexpected?

&lt;a href=&quot;http://www.sandia.gov/news-center/news-releases/2006/physics-astron/hottest-z-output.html&quot; rel=&quot;nofollow&quot;&gt;&lt;blockquote&gt;The very high radiation output also creates &lt;b&gt;new experimental environments&lt;/b&gt; to help validate computer codes responsible for maintaining a reliable nuclear weapons stockpile safely and securely â€&quot; the principal mission of the Z facility.&lt;/blockquote&gt;&lt;/a&gt;</description>
		<content:encoded><![CDATA[<p>Layman wondering.</p>
<p>Would Ingoing/outgoing states on the horizon would be a wonderfull thing to be able to read?</p>
<p>Maybe a way in which to use the olympics(onion view in calorimetric perspective)? Of course, I tend to think of entangled states but at such energies?</p>
<p>Who has gotten the closest? Glast maybe? LHC?:)Maybe something happens with superfluid states that was unexpected?</p>
<p><a href="http://www.sandia.gov/news-center/news-releases/2006/physics-astron/hottest-z-output.html" rel="nofollow"><br />
<blockquote>The very high radiation output also creates <b>new experimental environments</b> to help validate computer codes responsible for maintaining a reliable nuclear weapons stockpile safely and securely â€&#8221; the principal mission of the Z facility.</p></blockquote>
<p></a></p>
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		<title>By: PK</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12690</link>
		<dc:creator>PK</dc:creator>
		<pubDate>Fri, 10 Mar 2006 17:49:38 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12690</guid>
		<description>Once, after explaining at length to a journalist a very nice paper on quantum holography, my quoted comment became: &quot;it&#039;s a cute idea. It follows the laws of physics.&quot;

However, I just talked to another journalist who put &lt;i&gt;a lot&lt;/i&gt; of effort into understanding my work. So I am hopeful...</description>
		<content:encoded><![CDATA[<p>Once, after explaining at length to a journalist a very nice paper on quantum holography, my quoted comment became: &#8220;it&#8217;s a cute idea. It follows the laws of physics.&#8221;</p>
<p>However, I just talked to another journalist who put <i>a lot</i> of effort into understanding my work. So I am hopeful&#8230;</p>
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		<title>By: Plato</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12688</link>
		<dc:creator>Plato</dc:creator>
		<pubDate>Wed, 01 Mar 2006 20:35:57 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12688</guid>
		<description>&lt;b&gt;The Tao of Quantum Interrogation&lt;/b&gt;

&lt;a href=&quot;http://www.physics.uiuc.edu/People/Faculty/profiles/Kwiat/Interaction-Free-Measurements.htm&quot; rel=&quot;nofollow&quot;&gt;&lt;blockquote&gt;If, on the other hand, a single photon hits the element, well then by definition there is a loud explosion, and the detective knows that this was a good bomb. &lt;b&gt;There seems to be no way to find the good bombs without always exploding them.&lt;/b&gt;&lt;/blockquote&gt;&lt;/a&gt;


This seems really confusing to me.

In collision processes, &quot;resulting evidence&quot; is from the interactive process, while in consideration above? How would you know the particles inherent state, without making the interactive process, the result?

You assume then, the energy needed, and from that, the emission spectrumally enhanced? You know this, before hand, as an &lt;a href=&quot;http://www.lkb.ens.fr/recherche/qedcav/pictures/rydberg/qnd/newmanip.gif&quot; rel=&quot;nofollow&quot;&gt;entangled state&lt;/a&gt;?

Layman scratching head.</description>
		<content:encoded><![CDATA[<p><b>The Tao of Quantum Interrogation</b></p>
<p><a href="http://www.physics.uiuc.edu/People/Faculty/profiles/Kwiat/Interaction-Free-Measurements.htm" rel="nofollow"><br />
<blockquote>If, on the other hand, a single photon hits the element, well then by definition there is a loud explosion, and the detective knows that this was a good bomb. <b>There seems to be no way to find the good bombs without always exploding them.</b></p></blockquote>
<p></a></p>
<p>This seems really confusing to me.</p>
<p>In collision processes, &#8220;resulting evidence&#8221; is from the interactive process, while in consideration above? How would you know the particles inherent state, without making the interactive process, the result?</p>
<p>You assume then, the energy needed, and from that, the emission spectrumally enhanced? You know this, before hand, as an <a href="http://www.lkb.ens.fr/recherche/qedcav/pictures/rydberg/qnd/newmanip.gif" rel="nofollow">entangled state</a>?</p>
<p>Layman scratching head.</p>
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		<title>By: Daryl McCullough</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12702</link>
		<dc:creator>Daryl McCullough</dc:creator>
		<pubDate>Wed, 01 Mar 2006 18:53:37 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12702</guid>
		<description>Ambitwistor,

Yes, I think I was thinking of this reference (cited in &quot;Schroedinger&#039;s Rabbits?&quot;)
Kent, A., and D. Wallace. &lt;a href=&quot;http://arxiv.org/abs/quant-ph/0102118&quot; rel=&quot;nofollow&quot;&gt;Quantum interrogation and the safer X-ray&lt;/a&gt;</description>
		<content:encoded><![CDATA[<p>Ambitwistor,</p>
<p>Yes, I think I was thinking of this reference (cited in &#8220;Schroedinger&#8217;s Rabbits?&#8221;)<br />
Kent, A., and D. Wallace. <a href="http://arxiv.org/abs/quant-ph/0102118" rel="nofollow">Quantum interrogation and the safer X-ray</a></p>
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		<title>By: Ambitwistor</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12701</link>
		<dc:creator>Ambitwistor</dc:creator>
		<pubDate>Wed, 01 Mar 2006 18:13:43 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12701</guid>
		<description>Daryl:

Maybe you&#039;re thinking of &lt;a href=&quot;http://darwin.nap.edu/books/0309090512/html/153.html&quot; rel=&quot;nofollow&quot;&gt;Schroedinger&#039;s Rabbits&lt;/a&gt;?  I wouldn&#039;t expect any practical medical applications anytime soon, though ...</description>
		<content:encoded><![CDATA[<p>Daryl:</p>
<p>Maybe you&#8217;re thinking of <a href="http://darwin.nap.edu/books/0309090512/html/153.html" rel="nofollow">Schroedinger&#8217;s Rabbits</a>?  I wouldn&#8217;t expect any practical medical applications anytime soon, though &#8230;</p>
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		<title>By: Sean</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12700</link>
		<dc:creator>Sean</dc:creator>
		<pubDate>Wed, 01 Mar 2006 17:42:30 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12700</guid>
		<description>Todd, the paper should be available now.</description>
		<content:encoded><![CDATA[<p>Todd, the paper should be available now.</p>
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		<title>By: todd.</title>
		<link>http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12699</link>
		<dc:creator>todd.</dc:creator>
		<pubDate>Wed, 01 Mar 2006 16:39:39 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/cosmicvariance/2006/02/28/paul-kwiat-on-quantum-computation/#comment-12699</guid>
		<description>I&#039;m not sure if this is the appropriate place to mention this, but I got &quot;The system cannot find the file specified.&quot; while trying to load the referenced paper on Grover&#039;s algorithm (http://www.physics.uiuc.edu/Research/QI/Photonics/kwiat-jmo-47-257.pdf ?).</description>
		<content:encoded><![CDATA[<p>I&#8217;m not sure if this is the appropriate place to mention this, but I got &#8220;The system cannot find the file specified.&#8221; while trying to load the referenced paper on Grover&#8217;s algorithm (<a href="http://www.physics.uiuc.edu/Research/QI/Photonics/kwiat-jmo-47-257.pdf" rel="nofollow">http://www.physics.uiuc.edu/Research/QI/Photonics/kwiat-jmo-47-257.pdf</a> ?).</p>
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