tag:blogger.com,1999:blog-22973357.post3427913096061791463..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Searching for Spacetime DefectsSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger35125tag:blogger.com,1999:blog-22973357.post-5555929717144422242013-12-27T08:36:47.246-05:002013-12-27T08:36:47.246-05:00Unknown,
You're confused because you got the ...Unknown,<br /><br />You're confused because you got the premise up-side down. In this scenario geometry is *not* the 'essential substrate of reality'. Instead, the fundamental structure is something entirely different, some kind of network, something that's discrete and just approximates a smooth background. Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-25052191626929130082013-12-27T05:28:23.955-05:002013-12-27T05:28:23.955-05:00Unknown artist from another artist interested in ...Unknown artist from another artist interested in these questions : <br />Perhaps the essence as an underlying perfection is the question. How art relates reflecting and influencing the other would views or the world. <br />An artist friend (we were so young then) saw me making a Pauling dodecahedron of straws and jacks from an inorganic chemistry set then asked me if I could make a ball of L. Edgar Ottohttps://www.blogger.com/profile/00525169618204198073noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-14651722667754026532013-12-26T15:38:16.785-05:002013-12-26T15:38:16.785-05:00Hi - I'm not a physicist, but very interested ...Hi - I'm not a physicist, but very interested in these questions and love perusing this blog. My question is, space-time defects seem IMHO much more question-begging than perfection. Because if space-time geometry is the essential substrate of reality, what could intervene into it to create a defect? That would seem to presuppose something external to that geometry that could cause a defect.Unknownhttps://www.blogger.com/profile/09457888874468578563noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-20583462981443952022013-12-24T07:52:23.195-05:002013-12-24T07:52:23.195-05:00Frank,
I thought about this, but couldn't mak...Frank,<br /><br />I thought about this, but couldn't make sense of it. Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-17244004631178247592013-12-23T15:41:17.121-05:002013-12-23T15:41:17.121-05:00Think about this Frank: no matter how many million...Think about this Frank: no matter how many millions some agency throws or wastes to strengthen encryption it will not work unless they understood on a higher level the very question you asked us to think about. L. Edgar Ottohttps://www.blogger.com/profile/00525169618204198073noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-27041455098806003012013-12-23T13:47:57.434-05:002013-12-23T13:47:57.434-05:00REF:http://www.tgdaily.com/space-features/82309-yo...REF:http://www.tgdaily.com/space-features/82309-you-cant-get-entangled-without-a-wormhole<br /><br />Think bigger! Defects (voids) in a granular spacetime equals wormholes?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-49037858093067135982013-12-22T20:11:27.809-05:002013-12-22T20:11:27.809-05:00Interesting, the idea of collecting such singulari...Interesting, the idea of collecting such singularities. Where it may be the linear position (or non-linear, non-local superposition) may be a fixed number coordinate code such as holes involving Goldbach's conjecture.<br />Time travel may be limited over a quantum span both ways into the past of future as QM theory seems to suggest<br />At spacious field of zero D as rest we see duration as L. Edgar Ottohttps://www.blogger.com/profile/00525169618204198073noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-13609318298051866902013-12-22T11:24:48.874-05:002013-12-22T11:24:48.874-05:00I want to add some consequences should such an exp...I want to add some consequences should such an experiment work.<br />Crick et al in perfecting their model took the cosmological answer to be its role of replication. So they thought of hydrogen bonding.<br />If the experiments work it would make more natural ways to intervine to aid globally from a higher stance of Phenomenology methods and self repair of errors by code buildt already into the L. Edgar Ottohttps://www.blogger.com/profile/00525169618204198073noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-60958751687405721352013-12-22T06:55:39.217-05:002013-12-22T06:55:39.217-05:00Basically, I said your phenomenological approach i...Basically, I said your phenomenological approach is a more advanced way to explore the cosmological question as physics. Just as Crick and Watson asked facing models to assemble of DNA with due regard for Rosylin's data from the crystal structure.<br />A minimum distance concept needs to consider the relation to min duration (divided by c) beyond linear. This a long standing foundational L. Edgar Ottohttps://www.blogger.com/profile/00525169618204198073noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-79306410716371018332013-12-22T03:04:30.564-05:002013-12-22T03:04:30.564-05:00Bee can you kindly update on what will be needed t...Bee can you kindly update on what will be needed to experimentally test Doubly Special Relativity and Discrete Spacetime theories? Can they be tested today, or do we need tomorrow's technology?<br /><br />You are obviously very familiar with Giovanni Amelino-Camelia's work (and have cited him in your PRD paper too). In 2001 he wrote the paper "Testable scenario for Relativity with Ashish Sirohihttps://www.blogger.com/profile/07059760270378351196noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-38075099876189400492013-12-21T23:43:11.257-05:002013-12-21T23:43:11.257-05:00This comment has been removed by the author.Ashish Sirohihttps://www.blogger.com/profile/07059760270378351196noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-40113155268857170492013-12-21T23:42:18.111-05:002013-12-21T23:42:18.111-05:00Bee is moving on up and Congratulations! Today a D...Bee is moving on up and Congratulations! Today a D (Physical Review D), not the best grade, but tomorrow an A (Physical Review A)!Ashish Sirohihttps://www.blogger.com/profile/07059760270378351196noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-61842904299079175762013-12-21T11:14:47.051-05:002013-12-21T11:14:47.051-05:00@Georg An unlimited size graphene sheet closes to...@Georg An unlimited size graphene sheet closes to an elliptic surface given 12 internal regular pentagons. The smallest example is dodecahedrane, C_20H_20. A C_260 fullerene,<br /><br />http://www.mazepath.com/uncleal/c260.xyz<br /> (View with CHIME plug-in)<br /><br />is point group <b>I</b> (not <b>I_<i>h</i></b>) and is calculated to be perfectly mathematically chiral. Petitjean's Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-88457124633670849742013-12-21T09:25:57.161-05:002013-12-21T09:25:57.161-05:00As a chemist,
one thinks of C60, when looking at t...As a chemist,<br />one thinks of C60, when looking at that graphite monolayer with pentagon defects. <br />http://de.wikipedia.org/wiki/Fullerene<br />Regards<br />GeorgGeorghttps://www.blogger.com/profile/02538391164351204407noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-39196630769344286062013-12-20T18:23:35.909-05:002013-12-20T18:23:35.909-05:00"a mechanism to collect them", that'..."a mechanism to collect them", that's exactly what crossed my mind! I just couldn't figure out what such mechanism would based upon as there was no evidence on your papers for possible interaction mechanisms between such defects so that I could set up a bait to lure some of them nasty beasts to make them gather! But you are so much more clever and I trust that you could figure Theophanes Raptishttps://www.blogger.com/profile/01269614280130174555noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-66608595247025598262013-12-20T16:58:25.696-05:002013-12-20T16:58:25.696-05:00Bee - " I am presently quite excited about th...Bee - " I am presently quite excited about this because there is basically nobody who has previously looked at space-time defects, and there’s thus a real possibility that analyzing the data the right way might reveal something unexpected. "<br /><br />Well now you've done gone and done it.. there will soon be a stampede of researchers chasing your lead!<br /><br />Congrats though Anonymous Snowboarderhttps://www.blogger.com/profile/13705929076819672791noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-46179832358392579702013-12-20T10:59:24.669-05:002013-12-20T10:59:24.669-05:00IMO magnetic motors work on this principle. They&#...IMO magnetic motors work on this principle. They're collecting magnetic monopoles and harnessing negentropic work from them. The ensembles of Dirac fermions inside of superconductors and topological insulators can violate the gravitational law instead.Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-4104297053491785362013-12-20T10:31:05.994-05:002013-12-20T10:31:05.994-05:00Well, the interaction probability for localized st...Well, the interaction probability for localized states is basically zero. So there's not much travel that you can do with these defects, unless you can cook up a mechanism to collect them.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-33623860315489414152013-12-20T09:53:44.911-05:002013-12-20T09:53:44.911-05:00"A particle that encounters a nonlocal defect..."A particle that encounters a nonlocal defect continues its path in space-time elsewhere, but with the same momentum"<br /><br />Seems you 've just invented the absolute space-time travel mechanism!Theophanes Raptishttps://www.blogger.com/profile/01269614280130174555noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-47651315722645034972013-12-20T08:00:52.755-05:002013-12-20T08:00:52.755-05:00Jaybeegee,
Thanks for mentioning 't Hooft'...Jaybeegee,<br /><br />Thanks for mentioning 't Hooft's paper, I had missed it! Should probably have a look. (Unfortunately, this just reminded me there's a proceedings deadline at the end of the month.) Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-14118107290072205272013-12-20T07:31:14.982-05:002013-12-20T07:31:14.982-05:00In another words, most of problems of contemporary...In another words, most of problems of contemporary physics are just a problem of vague terminology.Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-45280460048853360792013-12-20T07:28:02.284-05:002013-12-20T07:28:02.284-05:00The search for space-time defects may not be a dif...The search for space-time defects may not be a difficult task, until we consider all forces violating the inverse square law (with exception of gravity) into account. The various dipole and dispersion forces, Casimir force and magnetic forces may affect the geodesic motion of massive bodies across space-time and as such they can be considered a space-time defects too.<br /><br />Alternatively youZephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-74178714425178949342013-12-19T20:16:22.923-05:002013-12-19T20:16:22.923-05:00forgot to mention 't Hooft's recent prepri...forgot to mention 't Hooft's recent preprint, promoting his discrete determistic Hamiltonian formulation of QM<br /><br />http://arxiv.org/abs/1312.1229<br /><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-55277985775632710692013-12-19T19:43:45.280-05:002013-12-19T19:43:45.280-05:00PhysRevD - Wow - congratulations!PhysRevD - Wow - congratulations!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-79662503522879675602013-12-19T15:32:07.462-05:002013-12-19T15:32:07.462-05:00All very interesting.All very interesting.Anonymousnoreply@blogger.com