tag:blogger.com,1999:blog-22973357.post8255401905733860662..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Dear Dr B: Can you think of a single advancement in theoretical physics, other than speculation, since the early 1980's?Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger58125tag:blogger.com,1999:blog-22973357.post-60422758684274264472015-11-30T00:47:11.915-05:002015-11-30T00:47:11.915-05:00LucyM,
My comment rules are here, the link can be...LucyM,<br /><br />My comment rules are <a href="http://backreaction.blogspot.com/p/comment-rules.html" rel="nofollow">here</a>, the link can be found directly below the header of this blog. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-32088386285730246342015-11-29T15:37:08.717-05:002015-11-29T15:37:08.717-05:00zepher says "You apparently missed tons of my...zepher says "You apparently missed tons of my posts which were banned from there, as such a things cannot be observed." <br /><br />Yes of course it is completely true I have no visibility of the comments that are blocked by Bee. Everyone with a blog will have an implicit or explicit policy on commenting. I don't know what her policy is, and didn't base what I said on needing toAnonymoushttps://www.blogger.com/profile/17852247942652368610noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-18535415258474893362015-11-28T22:06:26.698-05:002015-11-28T22:06:26.698-05:00MarkusM thanks for the Connes et al. link. Wasn...MarkusM thanks for the Connes et al. link. Wasn't aware of this work. Very intriguing. Anonymoushttps://www.blogger.com/profile/14479459346584756683noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-35302477061276630652015-11-28T07:53:28.377-05:002015-11-28T07:53:28.377-05:00Zephir: As we both know, and now everybody else to...Zephir: As we both know, and now everybody else too, you have stopped submitting comments since I enforce the no-selfpromotion rule. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-37498455171556411782015-11-28T06:06:16.482-05:002015-11-28T06:06:16.482-05:00Paperscape.org, great site, thank you Sabine !
Paperscape.org, great site, thank you Sabine !<br />Koenraad Van Spaendonckhttps://www.blogger.com/profile/15090279727324831109noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-21049963108834046542015-11-28T06:01:33.726-05:002015-11-28T06:01:33.726-05:00/* gosh bee you fearlessly let people have their s.../* gosh bee you fearlessly let people have their say...it's the strongest signal about you because it's observed */<br /><br />You apparently missed tons of my posts which were banned from there, as such a things cannot be observed.Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-83189845010525219322015-11-27T10:02:18.202-05:002015-11-27T10:02:18.202-05:00i certinly agree with you about the pointlessness ...i certinly agree with you about the pointlessness of arguing about the use of words (as Humpty Dumpty told Alice - ""When I use a word," Humpty Dumpty said, in a rather scornful tone, "it means just what I choose it to mean - neither more nor less."<br />"The question is," said Alice, "whether you can make words mean so many different things." v"naivetheoristhttps://www.blogger.com/profile/00425164894020381981noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-58731461728931227132015-11-27T06:31:20.127-05:002015-11-27T06:31:20.127-05:00naivetheorist says...
"...It is these “entir...naivetheorist says...<br /> "...It is these “entirely new properties”, which later would be termed “emergent properties”, and you would recognize that there are fundamental laws that are distinct for each level of complexity which cannot be obtained from the fundamrntal laws the govern behavior at a lower level of complexity."<br /><br />No one knows any of what you say, no one knows Anonymoushttps://www.blogger.com/profile/17852247942652368610noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-18141364013117626902015-11-27T06:02:23.911-05:002015-11-27T06:02:23.911-05:00gosh bee you fearlessly let people have their say....gosh bee you fearlessly let people have their say...it's the strongest signal about you because it's observedAnonymoushttps://www.blogger.com/profile/17852247942652368610noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-67488995523183754512015-11-27T03:23:01.652-05:002015-11-27T03:23:01.652-05:00naivetheorist:
I have explained explicitly that w...naivetheorist:<br /><br />I have explained explicitly that what I mean by "fundamental" in this context are axioms of out theories that are to best current knowledge not emergent. You might not like this use of the word, but I find it pointless to fight about the use of words. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-45491767728713108272015-11-26T17:38:20.005-05:002015-11-26T17:38:20.005-05:00Hello Bee - I respect your POV but oughtn't yo...Hello Bee - I respect your POV but oughtn't you mention that's what it is. I found myself returning to the Matt Ridley piece, in which you came to things - essentially the same thing - with rather a different slant, quoting brings here a taste, e.g. "The technologies we use today, the computer that you sit in front of – semiconductors, lasers, liquid crystal displays – are based on Anonymoushttps://www.blogger.com/profile/17852247942652368610noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-88992278203631165262015-11-26T11:33:07.053-05:002015-11-26T11:33:07.053-05:00sabine:
you say " There will never be any fu...sabine:<br />you say " There will never be any fundamental breakthroughs in condensed matter physics or plasma physics, just to name two examples, because the subjects of study in these fields are not themselves fundamental.". why in your opinion, are these fields, e.g., condensed matter physics and soft matter physics - for which P.-G. deGennes won the 1991 Nobel Prize in Physics (andnaivetheoristhttps://www.blogger.com/profile/00425164894020381981noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-91878372613589223482015-11-26T06:03:02.756-05:002015-11-26T06:03:02.756-05:00Yes, I'm going to agree with MarkusM that Conn...Yes, I'm going to agree with MarkusM that Connes' description of the standard model is an advancement in theoretical HEP worthy of mention since it has something to do with actual physics. Indeed it underlies the understanding of the fermion-W mass relation I mentioned earlier. The 170GeV Higgs mass prediction is now acknowledged to be a theoretical mistake, in that it was derived by John Barretthttps://www.blogger.com/profile/15593634408567857449noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-25672453423935204172015-11-26T05:39:22.482-05:002015-11-26T05:39:22.482-05:00@Uncle Al: You are absolutely right, you spotted a...@Uncle Al: You are absolutely right, you spotted a big problem with this paper. (This is why I said "+ follow up papers"). However, it turned out that they had wrongly neglected the contribution of a scalar field in the Lagrangian. You can find the "fix" here:<br />http://arxiv.org/abs/1208.1030 <br /><br />Connes explains the (funny) story with the Higgs mass in a video (MarkusMhttps://www.blogger.com/profile/03431499396962852389noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-75727970486431514182015-11-26T01:24:50.218-05:002015-11-26T01:24:50.218-05:00This comment has been removed by the author.MarkusMhttps://www.blogger.com/profile/03431499396962852389noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-21347973503041882462015-11-26T00:58:08.475-05:002015-11-26T00:58:08.475-05:00You should add AdS/CFT which showed that an N dime...You should add AdS/CFT which showed that an N dimensional QFT with gravity is dual to a N-1 Conformal Field Theory without gravity!<br /><br />Also, add Witten's 11 dimenstional M-Theory that showed that the 5 different 10 dimensional string theories were just different limits of M-Theory.<br />FrankHhttps://www.blogger.com/profile/06802957710104853869noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-39622751687431973492015-11-25T16:14:03.723-05:002015-11-25T16:14:03.723-05:00May I offer a different view: The comment by Coyle...May I offer a different view: The comment by Coyler (and I have no idea who he is) indicates to me that he is among those who think that physics is part of the entertainment industry; where something is amiss if one can’t, more or less regularly, hype something as a breakthrough, as mind blowing, baffling, or as some other sensationalist drivel. <br />Serious physicists/scientific professionals Bavaruspexhttps://www.blogger.com/profile/09113094273259682085noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-59584323328828327152015-11-25T10:30:19.835-05:002015-11-25T10:30:19.835-05:00@MarkusM
arXiv:hep-th/0610241 "giving in pa...@MarkusM <br />arXiv:hep-th/0610241 "giving in particular a Higgs mass around 170 GeV"<br />Higgs boson measured mass is 125.09±0.21 (stat.)±0.11 (syst.) GeV/c² (CMS+ATLAS)<br />The observed Higgs mass suggests a deep failure of <i>exact</i> theory, including persistence of the universe given that a false vacuum has already decayed re Big Bang inflation. Hypernovae, magnetars, Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-69555778452358658772015-11-25T09:02:28.099-05:002015-11-25T09:02:28.099-05:00Thomas, I don't disagree.
The science of nonl...Thomas, I don't disagree.<br /><br />The science of nonlinear dynamics, chaos and fractals may have been initiated in the '70s but it continues to evolve nowadays in many research areas. The ability to stand the test of time is precisely the hallmark of a true scientific breakthrough.Ervin Goldfainhttps://www.blogger.com/profile/07585008304556273617noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-8439156315998925712015-11-25T04:46:55.776-05:002015-11-25T04:46:55.776-05:00Erwin,
Universal attributes of nonlinear dynamics...Erwin,<br /><br />Universal attributes of nonlinear dynamics, chaos theory and the geometry of fractals go back to the mid 70s and were pretty well understood by 1985. In that year people even started to apply CFT to fractals, in particular Bertrand Duplantier.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-51133457342990305942015-11-24T19:43:06.454-05:002015-11-24T19:43:06.454-05:00Excellent list! I would also choose the works Cand...Excellent list! I would also choose the works Candelas and de la Ossa, Gopakumar-Vafa and other authors related to enumerative problems such as the Clemmens conjecture, which are pretty impressive. And also the Seiberg-Witten theory and the works of Nekrasov and co-authors about the subject are really an advance, at least in my humble opinion. Even though there are not experiments related to Osvaldohttps://www.blogger.com/profile/07880225283463127172noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-81422504809580765292015-11-24T14:33:08.876-05:002015-11-24T14:33:08.876-05:00"But it occured pre-1985"
Maurice, plea..."But it occured pre-1985"<br /><br />Maurice, please keep in mind that full development of chaos theory and fractals happened post-1977, with significant contributions to the field occurring past 1985. And it is still evolving nowadays on many fronts.Ervin Goldfainhttps://www.blogger.com/profile/07585008304556273617noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-89322502671971419002015-11-24T13:09:52.967-05:002015-11-24T13:09:52.967-05:00Bee,
I think the question is badly posed: advance...Bee,<br /><br />I think the question is badly posed: advances in theoretical physics are speculative until confirmed by experiment. The big confirmations of speculative ideas since the 80's are in astrophysics and cosmology, especially dark matter and dark energy. Cosmology has been solidly incorporated into physics, and much of that has happened in the past 35 years. Your answers touched CapitalistImperialistPighttps://www.blogger.com/profile/17523405806602731435noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-87476132622810284532015-11-24T13:09:27.458-05:002015-11-24T13:09:27.458-05:00I consider the greatest triumph in fundamental the...I consider the greatest triumph in fundamental theoretical physics of the last decades the derivation of the Standard Model (SM) from noncommutative geometry by Alain Connes et al. <br />See: http://arxiv.org/abs/hep-th/0610241v1 + follow up papers.<br />It is now clear that the monstrously looking Lagrangian of the SM has a deep geometric meaning and is in fact derivable from a few mathematicalMarkusMhttps://www.blogger.com/profile/03431499396962852389noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-86141606535693010742015-11-24T12:40:47.604-05:002015-11-24T12:40:47.604-05:00Maurice,
I repeat that you are misunderstanding w...Maurice,<br /><br />I repeat that you are misunderstanding what I have now said several times. I never claimed, neither in my blogpost nor in the comments, that the examples in my list are from "fundamental" physics, in the sense that I have defined it above. Would you please stop accusing me of saying things I didn't say. <br /><br />Your confusion is that you state that "in Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.com