tag:blogger.com,1999:blog-22973357.post5614274579507317863..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: The three phases of space-time Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger18125tag:blogger.com,1999:blog-22973357.post-26053464715241976852013-12-12T06:04:49.768-05:002013-12-12T06:04:49.768-05:00Bee:One of them is eg the spectral index, which (I...<i><b>Bee</b>:One of them is eg the spectral index, which (I believe) should be possible to extract somehow from the properties of the phase transition</i><br /><br />I think that is an interesting concept and one which I find might have some play in the gravitational rainbow? Hehe...and why not such a colorful world.<br /><br />Best,PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-18014112072630784712013-12-12T03:38:30.004-05:002013-12-12T03:38:30.004-05:00Unknown,
Yes, I do because I find not globally hy...Unknown,<br /><br />Yes, I do because I find not globally hyperbolic cases quite interesting. Alas, I think the issue is that in CDT it's an all-or-nothing choice and, looking around, the nothing option seems to agree better with what I see. Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-45431790348664419142013-12-11T13:20:15.628-05:002013-12-11T13:20:15.628-05:00Hi Bee,
if I'm not mistaken CDT applies is re...Hi Bee,<br /><br />if I'm not mistaken CDT applies is restricted to globally hyperbolic spacetimes, don't you think that this constraint is too strong?Unknownhttps://www.blogger.com/profile/11453264117086069974noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-33804936145125047342013-12-09T13:31:35.473-05:002013-12-09T13:31:35.473-05:00Bee, CDT remembers me (even those weird discrete c...Bee, CDT remembers me (even those weird discrete chunks of "space" and "time") tropical curves and surfaces. Of course, I can be wrong... :PJhttps://www.blogger.com/profile/01942050607289418780noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-22307772875870465672013-12-08T17:30:33.266-05:002013-12-08T17:30:33.266-05:00Matti, I have another reply I will post eventuall...Matti, I have another reply I will post eventually for your take on these field and geometry problems. But it id hard to discuss such connectivity issued while my thin link to the net by smart phone had "data connectivity problems "<br />L. Edgar Ottohttps://www.blogger.com/profile/00525169618204198073noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-65017852195222461242013-12-07T17:30:51.079-05:002013-12-07T17:30:51.079-05:00I posted a few corrections to your blog post here:...I posted a few corrections to your blog post here: tsm2.blogspot.com<br />Wolfganghttps://www.blogger.com/profile/07086991199438418163noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-32917641773382668742013-12-07T01:09:17.036-05:002013-12-07T01:09:17.036-05:00To Edgar Otto:
I assume that you mean by pairs ...To Edgar Otto:<br /><br /><br />I assume that you mean by pairs pairs of real and p-adic manifolds. The observation is that the notion of manifold defined in terms of chart maps does not work in p-adic context if charts are p-adic. Total disconnectedness is the problem.<br /><br />One could however use real charts and map the p-adic points space-time points to real ones by some variant of Matti Pitkänenhttps://www.blogger.com/profile/13512912323574611883noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-4838819293753146812013-12-06T09:23:31.369-05:002013-12-06T09:23:31.369-05:00Bee,
Even with a course grained understanding this...Bee,<br />Even with a course grained understanding this seems an amazing intellectual endeavor. It must be very exciting to begin with some gossamer abstraction, breathe life into it with a pulse of intensive simulation and then have it take on personal idiosyncrasy and exhibit changes of life. Likely one would need to guard one’s clarity from enthrallment with the wonder of it all. <br /><br />Don Fosterhttps://www.blogger.com/profile/04814669413022486958noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-25103002187600415772013-12-05T04:35:27.535-05:002013-12-05T04:35:27.535-05:00Arun,
Maybe! The idea that a pre-geometric phase ...Arun,<br /><br />Maybe! The idea that a pre-geometric phase might have been a totally connected graph (or at least a very connected graph) with a small diameter was previously discussed in some of Fotini's papers on 'quantum graphity' and I think that was one of their motivations. It addresses the horizon problem in an obvious way. But inflation is very successful and there are many Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-50583339723372893932013-12-05T01:41:17.871-05:002013-12-05T01:41:17.871-05:00Matti, Why do we conclude something in the models...Matti, Why do we conclude something in the models can only form pairs (from your view) ? In such lines in the solar spectrum QM seems to resolve the anomalies. And the first few differentiations seem enough to consider for the bulk of system mass. This does bring up a Leibniz background to the models and his Monads as the richer complication as consciousness. Is there an intrinsic property of L. Edgar Ottohttps://www.blogger.com/profile/00525169618204198073noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-65287074358518633342013-12-04T22:31:28.079-05:002013-12-04T22:31:28.079-05:00The result brings in mind p-adic physics: the idea...<br />The result brings in mind p-adic physics: the idea about space-time having real and p-adic regions with p-adic regions serving as space-time correlates of cognition ("thought bubbles"). <br /><br />p-Adic topology is totally disconnected as the technical term goes: two open balls are either disjoint or same. This makes definition of manifold concept difficult. p-Adics however Matti Pitkänenhttps://www.blogger.com/profile/13512912323574611883noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-89115270366939487522013-12-04T19:10:54.700-05:002013-12-04T19:10:54.700-05:00/* if space-time is fundamentally discrete, it has.../* if space-time is fundamentally discrete, it has various different phases, much like water has different phases */<br /><br />This is the consequence of all emergent systems composed of discrete objects. In dense aether model the vacuum and particle interior represents an energetic continuum - the particles are just formed <a href="http://i.imgur.com/oYn5n3K.gif" rel="nofollow">more dense foam<Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-7623434439534767402013-12-04T12:31:25.613-05:002013-12-04T12:31:25.613-05:00Can a space-time phase transition of this sort sav...Can a space-time phase transition of this sort save us from the necessity of inflation?Arunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-74051166347322641202013-12-04T10:59:07.398-05:002013-12-04T10:59:07.398-05:00" ... in phase A everything is disconnected. ..." ... in phase A everything is disconnected. In phase B everything is connected."<br /><br />I think that's a problem for CDT. It assumes a priori what it is trying to prove.<br /><br />Quantum mechanics, conventionally, takes the same tack. A measure on the unconstrained interval (- oo, + oo) assumes a totally disconnected space, and after measurement the space is multiply t h rayhttps://www.blogger.com/profile/00150085167540063914noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-52348404063872531122013-12-04T10:49:46.224-05:002013-12-04T10:49:46.224-05:00A second order phase transition has critical opale...A second order phase transition has critical opalescence. That gives spontaneous small-scale fluctuations without requiring seeds to have them survive against evolving enormous scale fluctuations (the far end of the cosmic background radiation scale).<br /><br />http://www.youtube.com/watch?v=OgfxOl0eoJ0<br /> 1:10 launch. Methanol-cyclohexane going immiscible with temperature rise<br />Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-34284782929858312812013-12-04T10:06:18.038-05:002013-12-04T10:06:18.038-05:00This comment has been removed by the author.Joe Marchionehttps://www.blogger.com/profile/14935826012972826989noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-88808666634894916422013-12-04T10:03:30.522-05:002013-12-04T10:03:30.522-05:00This comment has been removed by the author.Joe Marchionehttps://www.blogger.com/profile/14935826012972826989noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-18413166092647276272013-12-04T09:21:02.386-05:002013-12-04T09:21:02.386-05:00I have seen the CDT approach discussed a lot recen...I have seen the CDT approach discussed a lot recently and though I favor geometry visualization this has the same sort of limitation as questions on the origin and extent of life over the universe. Do we see<br />Life as Shannon's chemical information hardware or Von Neumann's (see Paul Davies) also top down universal constructor software? <br />We seem to live in some geometrical regionL. Edgar Ottohttps://www.blogger.com/profile/00525169618204198073noreply@blogger.com