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> <channel><title>Comments on: If We Live in a Multiverse, How Many Are There?</title> <atom:link href="http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/feed/" rel="self" type="application/rss+xml" /><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/</link> <description>Space and astronomy news</description> <lastBuildDate>Sun, 21 Mar 2010 07:14:44 +0000</lastBuildDate> <generator>http://wordpress.org/?v=2.9.2</generator> <sy:updatePeriod>hourly</sy:updatePeriod> <sy:updateFrequency>1</sy:updateFrequency> <item><title>By: Paul Eaton-Jones</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71921</link> <dc:creator>Paul Eaton-Jones</dc:creator> <pubDate>Fri, 23 Oct 2009 08:46:32 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71921</guid> <description>I had always thought that the multiverse referred to many bubble universes within The Universe whereas the Multi World Interpretation resulted in parallel universes. This would  where you existed having made a decision &#039;now&#039; to do this rather than that, the universe split, and one version of you went on to do &#039;this&#039; and another version did &#039;that&#039;. Gregory Benford wrote a novel based on this idea - &#039;Timeslip&#039;- I  think.</description> <content:encoded><![CDATA[<p>I had always thought that the multiverse referred to many bubble universes within The Universe whereas the Multi World Interpretation resulted in parallel universes. This would  where you existed having made a decision &#039;now&#039; to do this rather than that, the universe split, and one version of you went on to do &#039;this&#039; and another version did &#039;that&#039;. Gregory Benford wrote a novel based on this idea &#8211; &#039;Timeslip&#039;- I  think.</p> ]]></content:encoded> </item> <item><title>By: Jon Hanford</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71747</link> <dc:creator>Jon Hanford</dc:creator> <pubDate>Mon, 19 Oct 2009 22:44:56 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71747</guid> <description>BeckyWS:I most heartedly concur with your post. I find it fascinating that theorists are vigorously pursing these questions, wherever it leads. Definitely, &quot;gobbledygook&quot; it is not.</description> <content:encoded><![CDATA[<p>BeckyWS:</p><p>I most heartedly concur with your post. I find it fascinating that theorists are vigorously pursing these questions, wherever it leads. Definitely, &#034;gobbledygook&#034; it is not.</p> ]]></content:encoded> </item> <item><title>By: BeckyWS</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71726</link> <dc:creator>BeckyWS</dc:creator> <pubDate>Mon, 19 Oct 2009 17:39:36 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71726</guid> <description>I&#039;d just like to say that this could be the thread with the most impenetrable posts ever! But I like that, it tells me there are people out there specialising in amazing fields, with detailed knowledge and exploratory minds.
&quot;Gobbledygook&quot; it is not.</description> <content:encoded><![CDATA[<p>I&#039;d just like to say that this could be the thread with the most impenetrable posts ever! But I like that, it tells me there are people out there specialising in amazing fields, with detailed knowledge and exploratory minds.<br
/> &#034;Gobbledygook&#034; it is not.</p> ]]></content:encoded> </item> <item><title>By: iantresman</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71670</link> <dc:creator>iantresman</dc:creator> <pubDate>Sun, 18 Oct 2009 20:45:41 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71670</guid> <description>I have it on good authority that there is just one University (ref).Ref.1  Z. Beeblebrox, &lt;i&gt;Proof of the number of Universes&lt;/i&gt;, Pub. 1903, Betelgeuse main library (closed during 2009 for refurbishment)</description> <content:encoded><![CDATA[<p>I have it on good authority that there is just one University (ref).</p><p>Ref.1  Z. Beeblebrox, <i>Proof of the number of Universes</i>, Pub. 1903, Betelgeuse main library (closed during 2009 for refurbishment)</p> ]]></content:encoded> </item> <item><title>By: RUF</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71629</link> <dc:creator>RUF</dc:creator> <pubDate>Sun, 18 Oct 2009 00:13:53 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71629</guid> <description>&quot;There are some things Man will never know&quot;.Will women know them?</description> <content:encoded><![CDATA[<p>&#034;There are some things Man will never know&#034;.</p><p>Will women know them?</p> ]]></content:encoded> </item> <item><title>By: Jon Hanford</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71616</link> <dc:creator>Jon Hanford</dc:creator> <pubDate>Sat, 17 Oct 2009 17:31:17 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71616</guid> <description>@HeadAroundUSome info on white holes can be found here: http://en.wikipedia.org/wiki/White_holes .</description> <content:encoded><![CDATA[<p>@HeadAroundU</p><p>Some info on white holes can be found here: <a
href="http://en.wikipedia.org/wiki/White_holes" rel="nofollow">http://en.wikipedia.org/wiki/White_holes</a> .</p> ]]></content:encoded> </item> <item><title>By: HeadAroundU</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71611</link> <dc:creator>HeadAroundU</dc:creator> <pubDate>Sat, 17 Oct 2009 15:28:57 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71611</guid> <description>I&#039;d like a bigger picture so I can read/see everything what&#039;s in it. :(Also, what&#039;s white hole???</description> <content:encoded><![CDATA[<p>I&#039;d like a bigger picture so I can read/see everything what&#039;s in it. <img
src='http://www.universetoday.com/wp-includes/images/smilies/icon_sad.gif' alt=':(' class='wp-smiley' /></p><p>Also, what&#039;s white hole???</p> ]]></content:encoded> </item> <item><title>By: Manu</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71610</link> <dc:creator>Manu</dc:creator> <pubDate>Sat, 17 Oct 2009 15:19:46 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71610</guid> <description>@ Anacond:&quot;There are some things Man will never know&quot;.I couldn&#039;t agree more. But please, lets not decide right away which ones these things are going to be.
We&#039;ll write down the score the day the last human dies.</description> <content:encoded><![CDATA[<p>@ Anacond:</p><p>&#034;There are some things Man will never know&#034;.</p><p>I couldn&#039;t agree more. But please, lets not decide right away which ones these things are going to be.<br
/> We&#039;ll write down the score the day the last human dies.</p> ]]></content:encoded> </item> <item><title>By: DrFlimmer</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71605</link> <dc:creator>DrFlimmer</dc:creator> <pubDate>Sat, 17 Oct 2009 13:47:49 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71605</guid> <description>It is always good for everyone to know his/her limits. I think I have an idea about my limits.Still: Not imaginable is NOT not knowing. I can&#039;t imagine the four dimensions of space-time, but I know that they exist. And there are many more examples....</description> <content:encoded><![CDATA[<p>It is always good for everyone to know his/her limits. I think I have an idea about my limits.</p><p>Still: Not imaginable is NOT not knowing. I can&#039;t imagine the four dimensions of space-time, but I know that they exist. And there are many more examples&#8230;.</p> ]]></content:encoded> </item> <item><title>By: Lawrence B. Crowell</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-3/#comment-71602</link> <dc:creator>Lawrence B. Crowell</dc:creator> <pubDate>Sat, 17 Oct 2009 11:54:52 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71602</guid> <description>We are limited, but not blind and incapable.  Astronomy illustrates aspects of the large scale structure of the universe, such as the Hubble relationship v = Hd, the big bang and so forth.  The mechanism for the big bang, or at least one phase of it, is inflation.  Predictions from inflation include small anisotropes in the microwave cosmic background in a certain distribution, which have been found.  There are also predictions of B-modes from gravitational decoupling.  The Planck probe is currently suveying the cosmic background for signatures of these.So the quest continues, and the next big issue is to understand how the cosmological constant, which drives the accelerated expansion of the universe, has the comparatively small value it has.LC</description> <content:encoded><![CDATA[<p>We are limited, but not blind and incapable.  Astronomy illustrates aspects of the large scale structure of the universe, such as the Hubble relationship v = Hd, the big bang and so forth.  The mechanism for the big bang, or at least one phase of it, is inflation.  Predictions from inflation include small anisotropes in the microwave cosmic background in a certain distribution, which have been found.  There are also predictions of B-modes from gravitational decoupling.  The Planck probe is currently suveying the cosmic background for signatures of these.</p><p>So the quest continues, and the next big issue is to understand how the cosmological constant, which drives the accelerated expansion of the universe, has the comparatively small value it has.</p><p>LC</p> ]]></content:encoded> </item> <item><title>By: ND</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71592</link> <dc:creator>ND</dc:creator> <pubDate>Sat, 17 Oct 2009 04:19:46 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71592</guid> <description>&quot;No, just a sober realization of Man&#039;s limitation.&quot;Great opening to make fun of Anaconda. Just sayin&#039; :)</description> <content:encoded><![CDATA[<p>&#034;No, just a sober realization of Man&#039;s limitation.&#034;</p><p>Great opening to make fun of Anaconda. Just sayin&#039; <img
src='http://www.universetoday.com/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /></p> ]]></content:encoded> </item> <item><title>By: Anaconda</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71582</link> <dc:creator>Anaconda</dc:creator> <pubDate>Sat, 17 Oct 2009 01:00:37 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71582</guid> <description>No, just a sober realization of Man&#039;s limitation.Crowel, are locked into a serious defense of this gobbledygook?Judging from the length of your responses, I would say you are.Professional back scratching...</description> <content:encoded><![CDATA[<p>No, just a sober realization of Man&#039;s limitation.</p><p>Crowel, are locked into a serious defense of this gobbledygook?</p><p>Judging from the length of your responses, I would say you are.</p><p>Professional back scratching&#8230;</p> ]]></content:encoded> </item> <item><title>By: Lawrence B. Crowell</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71571</link> <dc:creator>Lawrence B. Crowell</dc:creator> <pubDate>Fri, 16 Oct 2009 22:56:58 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71571</guid> <description>Anaconda offers up a council of despair.LC</description> <content:encoded><![CDATA[<p>Anaconda offers up a council of despair.</p><p>LC</p> ]]></content:encoded> </item> <item><title>By: Anaconda</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71562</link> <dc:creator>Anaconda</dc:creator> <pubDate>Fri, 16 Oct 2009 20:27:52 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71562</guid> <description>@ Dr Flimmer:Dr Flimmer wrote: What is easier to understand? A universe stretching from and to infinity in time or a universe that had a day with no yesterday and will face the Judgement Day (or all the possibilities in between)?&quot;How about simply saying Man is not privileged to know how the Universe started or how it will end, or how far it stretches.There are some things Man will never know -- pretending otherwise is a disservice to Science and potentially dangerous if elements of Science get locked into a serious defense of this kind  of gobbledygook.
&#039;</description> <content:encoded><![CDATA[<p>@ Dr Flimmer:</p><p>Dr Flimmer wrote: What is easier to understand? A universe stretching from and to infinity in time or a universe that had a day with no yesterday and will face the Judgement Day (or all the possibilities in between)?&#034;</p><p>How about simply saying Man is not privileged to know how the Universe started or how it will end, or how far it stretches.</p><p>There are some things Man will never know &#8212; pretending otherwise is a disservice to Science and potentially dangerous if elements of Science get locked into a serious defense of this kind  of gobbledygook.<br
/> &#039;</p> ]]></content:encoded> </item> <item><title>By: microverses</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71560</link> <dc:creator>microverses</dc:creator> <pubDate>Fri, 16 Oct 2009 20:11:04 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71560</guid> <description>@ Jorge - Who&#039;s an idiot? ME! I have to apologize to you - I am so used to seeing small remarks and then being led down that path of &#039;let&#039;s discredit this method of thinking things through in this manner&#039;, it&#039;s tiresome.My bad 100%. You have taught me a lesson, not to allow myself to assume, which is something I try to avoid and have obviously failed here.I&#039;m really sorry man. Please forgive me.</description> <content:encoded><![CDATA[<p>@ Jorge &#8211; Who&#039;s an idiot? ME! I have to apologize to you &#8211; I am so used to seeing small remarks and then being led down that path of &#039;let&#039;s discredit this method of thinking things through in this manner&#039;, it&#039;s tiresome.</p><p>My bad 100%. You have taught me a lesson, not to allow myself to assume, which is something I try to avoid and have obviously failed here.</p><p>I&#039;m really sorry man. Please forgive me.</p> ]]></content:encoded> </item> <item><title>By: ND</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71553</link> <dc:creator>ND</dc:creator> <pubDate>Fri, 16 Oct 2009 18:23:17 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71553</guid> <description>&quot;This theory is a philosophical attempt ...&quot;say what?! How does that work?</description> <content:encoded><![CDATA[<p>&#034;This theory is a philosophical attempt &#8230;&#034;</p><p>say what?! How does that work?</p> ]]></content:encoded> </item> <item><title>By: Manu</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71550</link> <dc:creator>Manu</dc:creator> <pubDate>Fri, 16 Oct 2009 17:59:53 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71550</guid> <description>Yes.mmfiore, get your facts right.
EPR is not a paradox (although originally conceived as one), it&#039;s a reproducible experimental fact.
Wave-Particle Duality has been abandoned as a concept for 50 years. Think quantum fields.</description> <content:encoded><![CDATA[<p>Yes.</p><p>mmfiore, get your facts right.<br
/> EPR is not a paradox (although originally conceived as one), it&#039;s a reproducible experimental fact.<br
/> Wave-Particle Duality has been abandoned as a concept for 50 years. Think quantum fields.</p> ]]></content:encoded> </item> <item><title>By: Lawrence B. Crowell</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71548</link> <dc:creator>Lawrence B. Crowell</dc:creator> <pubDate>Fri, 16 Oct 2009 17:47:04 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71548</guid> <description>I second Dr Flimmer&#039;s post here.  My post above we directed at mmfiore.  Quantum physics is a highly robust theory of particles and fields, and attempts to reduce it to &quot;rational mechanics&quot; so that nonlocality is some derived result of locality have failed.  Bell&#039;s theorem and other related results give a negative verdict on any possibility of doing so.LC</description> <content:encoded><![CDATA[<p>I second Dr Flimmer&#039;s post here.  My post above we directed at mmfiore.  Quantum physics is a highly robust theory of particles and fields, and attempts to reduce it to &#034;rational mechanics&#034; so that nonlocality is some derived result of locality have failed.  Bell&#039;s theorem and other related results give a negative verdict on any possibility of doing so.</p><p>LC</p> ]]></content:encoded> </item> <item><title>By: Lawrence B. Crowell</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71546</link> <dc:creator>Lawrence B. Crowell</dc:creator> <pubDate>Fri, 16 Oct 2009 16:30:38 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71546</guid> <description>There are many people who are convinced of this as well.  So far quantum mechanics has resisted these efforts, from Bell’s inequalities and Kochen-Specker theorem, to the Aspect experiments.  Quantum nonlocality and the existence of entanglements simply appear to exist on their own with no “realism” substratum.It might be worth my pointing out that 20 years ago I worked out and wrote on how general relativity when worked as a Schild’s ladder and the spin entanglement system of quantum mechanics has the same Galois algebraic representation GF(4), which is also the root space for the SO(8) group.  So quantum mechanics and general relativity at least within this “partial functor” are equivalent, and might ultimately prove to be two aspects of an identical system.  The system for GF(4) is the hexacode error correction code C_6, and it is possible that extended quantum error correction codes might embed both gravitation and quantum mechanics as different aspects of a single structure.Cheers LC</description> <content:encoded><![CDATA[<p>There are many people who are convinced of this as well.  So far quantum mechanics has resisted these efforts, from Bell’s inequalities and Kochen-Specker theorem, to the Aspect experiments.  Quantum nonlocality and the existence of entanglements simply appear to exist on their own with no “realism” substratum.</p><p>It might be worth my pointing out that 20 years ago I worked out and wrote on how general relativity when worked as a Schild’s ladder and the spin entanglement system of quantum mechanics has the same Galois algebraic representation GF(4), which is also the root space for the SO(8) group.  So quantum mechanics and general relativity at least within this “partial functor” are equivalent, and might ultimately prove to be two aspects of an identical system.  The system for GF(4) is the hexacode error correction code C_6, and it is possible that extended quantum error correction codes might embed both gravitation and quantum mechanics as different aspects of a single structure.</p><p>Cheers LC</p> ]]></content:encoded> </item> <item><title>By: DrFlimmer</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71545</link> <dc:creator>DrFlimmer</dc:creator> <pubDate>Fri, 16 Oct 2009 16:21:19 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71545</guid> <description>@ mmfiore:No physicist in the whole world will abandon quantum mechanics due to philosophical reasons. It&#039;s predictions have come true with an unheard-of precision. It is the newest of the &quot;big&quot; physical theories but it is the one theory that is checked and tested best. Even better than GR, which is also tested rather well.
Quantum mechanics describe the reality - no doubt about that.</description> <content:encoded><![CDATA[<p>@ mmfiore:</p><p>No physicist in the whole world will abandon quantum mechanics due to philosophical reasons. It&#039;s predictions have come true with an unheard-of precision. It is the newest of the &#034;big&#034; physical theories but it is the one theory that is checked and tested best. Even better than GR, which is also tested rather well.<br
/> Quantum mechanics describe the reality &#8211; no doubt about that.</p> ]]></content:encoded> </item> <item><title>By: mmfiore</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71540</link> <dc:creator>mmfiore</dc:creator> <pubDate>Fri, 16 Oct 2009 14:42:39 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71540</guid> <description>I agree with Mason Kelsey this article while very interesting, is pure speculation. While I think that it is important to keep an open mind we should take articles such as this with a grain of salt. The entire concept of Multiverses at this point relies Quantum Theory which relies on probability for the basis of its arguments. I think people are beginning to tire of hearing about the possibility of this and the possibility of that. After awhile according to QM everything that anyone can concieve of is possible. This is NOT the way the Universe works in the observable macroscopic world. That is why I suggest an alternative to Quantum Mechanics. Someone has got to to do it else we will be stuck in this fundametally flawed paradigm indefinitely.Einstein was right about the shortcomings of Quantum Mechanics and so therefore String Theory is also the incorrect approach. As an alternative to Quantum Theory there is a new theory that describes and explains the mysteries of physical reality. While not disrespecting the value of Quantum Mechanics as a tool to explain the role
of quanta in our universe. This theory states that there is also a classical explanation for the paradoxes such as EPR and the Wave-Particle Duality. The Theory is called the Theory of Super Relativity.
This theory is a philosophical attempt to reconnect the physical universe to realism and deterministic concepts. It explains the mysterious.</description> <content:encoded><![CDATA[<p>I agree with Mason Kelsey this article while very interesting, is pure speculation. While I think that it is important to keep an open mind we should take articles such as this with a grain of salt. The entire concept of Multiverses at this point relies Quantum Theory which relies on probability for the basis of its arguments. I think people are beginning to tire of hearing about the possibility of this and the possibility of that. After awhile according to QM everything that anyone can concieve of is possible. This is NOT the way the Universe works in the observable macroscopic world. That is why I suggest an alternative to Quantum Mechanics. Someone has got to to do it else we will be stuck in this fundametally flawed paradigm indefinitely.</p><p>Einstein was right about the shortcomings of Quantum Mechanics and so therefore String Theory is also the incorrect approach. As an alternative to Quantum Theory there is a new theory that describes and explains the mysteries of physical reality. While not disrespecting the value of Quantum Mechanics as a tool to explain the role<br
/> of quanta in our universe. This theory states that there is also a classical explanation for the paradoxes such as EPR and the Wave-Particle Duality. The Theory is called the Theory of Super Relativity.<br
/> This theory is a philosophical attempt to reconnect the physical universe to realism and deterministic concepts. It explains the mysterious.</p> ]]></content:encoded> </item> <item><title>By: Lawrence B. Crowell</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71535</link> <dc:creator>Lawrence B. Crowell</dc:creator> <pubDate>Fri, 16 Oct 2009 14:29:42 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71535</guid> <description>Bohm&#039;s quantum interpretation or &quot;theory&quot; works in relativity, or at least you can work up a Bohmian Klein-Gordon theory or even Dirac theory.  If works in a free field case.  Where it has trouble is with the coupling of particles in a  relativistic setting and the production of particles, and even worse if there is a mass-gap.  It does not have a ladder structure where the a and a-dagger operators generate discrete states of photons or other particles.MWI can be dispensed with, as frankly can all so called quantum interpretations.  I would say that the best approach to these matters is Zurek&#039;s decoherence and einselection work, which has a minimum of the sorts of metaphysics that other interpretations invoke.LC</description> <content:encoded><![CDATA[<p>Bohm&#039;s quantum interpretation or &#034;theory&#034; works in relativity, or at least you can work up a Bohmian Klein-Gordon theory or even Dirac theory.  If works in a free field case.  Where it has trouble is with the coupling of particles in a  relativistic setting and the production of particles, and even worse if there is a mass-gap.  It does not have a ladder structure where the a and a-dagger operators generate discrete states of photons or other particles.</p><p>MWI can be dispensed with, as frankly can all so called quantum interpretations.  I would say that the best approach to these matters is Zurek&#039;s decoherence and einselection work, which has a minimum of the sorts of metaphysics that other interpretations invoke.</p><p>LC</p> ]]></content:encoded> </item> <item><title>By: Torbjorn Larsson OM</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71532</link> <dc:creator>Torbjorn Larsson OM</dc:creator> <pubDate>Fri, 16 Oct 2009 13:23:32 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71532</guid> <description>Oh, and a final correction. I know that you probably didn&#039;t mean it, but Bohm&#039;s theory is both falsifiable and falsified. It is a non-local theory, so it fails at relativity (i.e. Lorentz invariance).Or it should, if it hadn&#039;t been non-relativistic in the first place...</description> <content:encoded><![CDATA[<p>Oh, and a final correction. I know that you probably didn&#039;t mean it, but Bohm&#039;s theory is both falsifiable and falsified. It is a non-local theory, so it fails at relativity (i.e. Lorentz invariance).</p><p>Or it should, if it hadn&#039;t been non-relativistic in the first place&#8230;</p> ]]></content:encoded> </item> <item><title>By: Lawrence B. Crowell</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71531</link> <dc:creator>Lawrence B. Crowell</dc:creator> <pubDate>Fri, 16 Oct 2009 13:18:38 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71531</guid> <description>The paper  &quot;How many universes are in the multiverse?&quot; by Andrei Linde, Vitaly Vanchurin:http://arxiv.org/PS_cache/arxiv/pdf/0910/0910.1589v1.pdfinvolves pocket universe logic.  The paper discusses the number of local FRW regions which are determined by the value of the scalar field of inflation in local regions.  The estimate given here involves counting of modes for N e-folds.  An e-fold is the number of volume increases due to de Sitter exponential expansion.  So the estimate is somewhat reasonable.The pocket universe  model is a bit odd, for it proposes there are regions of high scalar field density on a space which topologically (causally) disconnects regions by S-matrix domains of support.  I might as well consider a toy model to make a point about the pocket universe. The universe may well have emerged from some sort of quantum fluctuation. An easy model for this is a virtual wormhole. Inside the regions which connect up there exists a three-ball of space, and the wormhole junction results in a topological suturing of these two 3-balls into a three sphere. Now assume that inflation takes place by puncturing a hole in the three ball. This point or the boundary is removed &quot;to infinity&quot; from the perspective of the antipodal point and the space is converted to R^3 plus pt. If we consider the &quot;reciprocal&quot; of this space with r --&gt; 1/r the point that is removed is a singularity or in complex variables (complexified coordinates) a pole. An integration around this point of field propagators might then result in a branch point which connects this R^3 to other R^3 surfaces --- similar to Riemann sheets. For various reasons I find this to be a more aesthetic picture of what might be called the multi-verse.So this would I think clean up some of the issues with pocket universes.  This preserves the basic idea of e-fold statistics on how inflaton fields &quot;hop,&quot; but might prevent what I see as offensive boundary issues.  The statistics have some bearing on the cosmological constant and the entropy of the universe.  In fact if you are at all savy on matters of cosmology, there are relationships between the cosmological constant and the vacuum energy of the universe and its entropy.  So there may be some observational support which could be given to this type of cosmology.LC</description> <content:encoded><![CDATA[<p>The paper  &#034;How many universes are in the multiverse?&#034; by Andrei Linde, Vitaly Vanchurin:</p><p><a
href="http://arxiv.org/PS_cache/arxiv/pdf/0910/0910.1589v1.pdf" rel="nofollow">http://arxiv.org/PS_cache/arxiv/pdf/0910/0910.1589v1.pdf</a></p><p>involves pocket universe logic.  The paper discusses the number of local FRW regions which are determined by the value of the scalar field of inflation in local regions.  The estimate given here involves counting of modes for N e-folds.  An e-fold is the number of volume increases due to de Sitter exponential expansion.  So the estimate is somewhat reasonable.</p><p>The pocket universe  model is a bit odd, for it proposes there are regions of high scalar field density on a space which topologically (causally) disconnects regions by S-matrix domains of support.  I might as well consider a toy model to make a point about the pocket universe. The universe may well have emerged from some sort of quantum fluctuation. An easy model for this is a virtual wormhole. Inside the regions which connect up there exists a three-ball of space, and the wormhole junction results in a topological suturing of these two 3-balls into a three sphere. Now assume that inflation takes place by puncturing a hole in the three ball. This point or the boundary is removed &#034;to infinity&#034; from the perspective of the antipodal point and the space is converted to R^3 plus pt. If we consider the &#034;reciprocal&#034; of this space with r &#8211;&gt; 1/r the point that is removed is a singularity or in complex variables (complexified coordinates) a pole. An integration around this point of field propagators might then result in a branch point which connects this R^3 to other R^3 surfaces &#8212; similar to Riemann sheets. For various reasons I find this to be a more aesthetic picture of what might be called the multi-verse.</p><p>So this would I think clean up some of the issues with pocket universes.  This preserves the basic idea of e-fold statistics on how inflaton fields &#034;hop,&#034; but might prevent what I see as offensive boundary issues.  The statistics have some bearing on the cosmological constant and the entropy of the universe.  In fact if you are at all savy on matters of cosmology, there are relationships between the cosmological constant and the vacuum energy of the universe and its entropy.  So there may be some observational support which could be given to this type of cosmology.</p><p>LC</p> ]]></content:encoded> </item> <item><title>By: sail4evr</title><link>http://www.universetoday.com/2009/10/15/if-we-live-in-a-multiverse-how-many-are-there/comment-page-2/#comment-71530</link> <dc:creator>sail4evr</dc:creator> <pubDate>Fri, 16 Oct 2009 13:15:19 +0000</pubDate> <guid
isPermaLink="false">http://www.universetoday.com/?p=42696#comment-71530</guid> <description>why should there be a limit on the number of universes any more than there is no limit on prime numbers or no end to pi.</description> <content:encoded><![CDATA[<p>why should there be a limit on the number of universes any more than there is no limit on prime numbers or no end to pi.</p> ]]></content:encoded> </item> </channel> </rss>
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