tag:blogger.com,1999:blog-22973357.post2923574124356469275..comments2020-07-03T08:59:49.052-04:00Comments on Sabine Hossenfelder: Backreaction: Away NoteSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger17125tag:blogger.com,1999:blog-22973357.post-41473490665818305812016-01-18T02:58:39.203-05:002016-01-18T02:58:39.203-05:00Hi Sabine, (and Rickyjames),
you can construct a ...Hi Sabine, (and Rickyjames),<br /><br />you can construct a model based on Cramer's transactionnal interpretation of quantum mechanics (TIQM) where the known particles are composites of currents going up and down the time. It seems to explain the elementary particles mass spectrum from two geometrical constants (norms) and a few integral resonances. <br /><br />TIQM explains non-locality in aakidbellehttps://www.blogger.com/profile/12292741599925116131noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-77113041902388983192016-01-18T01:13:45.796-05:002016-01-18T01:13:45.796-05:00Rickyjames,
Yes, I know this and similar statemen...Rickyjames,<br /><br />Yes, I know this and similar statements. I don't find it very enlightening. To me the question is can you construct a model, does it explain something that other models can't explain.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-30716491299975683152016-01-17T16:38:55.575-05:002016-01-17T16:38:55.575-05:00You have probably seen this article, in particular...You have probably seen this article, in particular its last paragraph, but if not:<br /><br />https://physics.aps.org/articles/v8/123rickyjameshttps://www.blogger.com/profile/09303372085007768799noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-48956062563437699542016-01-17T15:33:41.350-05:002016-01-17T15:33:41.350-05:00Sabine, Jim,
The Wiki entry on Zeno's paradox ...Sabine, Jim,<br />The Wiki entry on Zeno's paradox is not vague. It features its standard resolution that Sabine repeats (its Ref. 4), but it also discusses the philosophical limitations of this resolution. See this nice paper: http://arxiv.org/abs/physics/0505042, by a respected physicist, that takes a standpoint that seems similar to the one of Jim. See in particular the last paragraph of Mauricehttps://www.blogger.com/profile/16375058316648610565noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-33236321548414702532016-01-17T14:32:58.387-05:002016-01-17T14:32:58.387-05:00Thanks again, and I saw nothing harsh in your resp...Thanks again, and I saw nothing harsh in your responses to me. One last beat of the horse: I agree nature's mysteries are not obliged to be fathomable by me, but both myself and Zeno would consider that there is one less mystery to fathom if space-time is discrete instead of continuous. And I think all our actual calculations, from abacuses to long-division to computers are done using JimVhttps://www.blogger.com/profile/10198704789965278981noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-25429755210174303552016-01-17T10:38:39.537-05:002016-01-17T10:38:39.537-05:00The Unreasonable Effectiveness of Mathematics in t...<i>The Unreasonable Effectiveness of Mathematics in the Natural Sciences</i> 1960, Eugene Wigner, doi:10.1002/cpa.3160130102. Physical reality does not calculate. Beauty and rigor do not assure empirical validity. Macroeconomics is a disaster, Karl Marx to Milton Friedman, Pol Pot to Augusto Pinochet. Uniting GR and QM; SUSY, dark matter, and baryogenesis are intractable because Official Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-44436480331746551852016-01-17T10:33:45.475-05:002016-01-17T10:33:45.475-05:00Dear Sabine,
Your Nova article on singularities w...Dear Sabine,<br /><br />Your Nova article on singularities was intriguing. Like most physicists, I am scared of infinities; I am sure nature is not fond of them either. As you implied, the gap between math and reality contain clusters of debris that occasionally inconvenience any possible smooth commuting between the destinations of math and reality. As a proposition, we will figure out what Philhttps://www.blogger.com/profile/01327513141159813681noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-56473484991198698872016-01-17T09:22:48.965-05:002016-01-17T09:22:48.965-05:00Jim,
That's not so controversial... Sorry in ...Jim,<br /><br />That's not so controversial... Sorry in case my reply was harsher than intended. Unfortunately I have found that philosophers sometimes like to insist that problems which have long been solved haven't been solved, and I was afraid that's what you were after.<br /><br />About the question how to 'actually sum an infinite amount of terms', I am not sure what you Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-40147193090068696042016-01-17T08:32:36.146-05:002016-01-17T08:32:36.146-05:00P.S. I can buy the book used for about $92 but I a...P.S. I can buy the book used for about $92 but I already read another book (different author) which had the same objective, and it didn't work, so I think the money would be better spent in a donation to this blog.JimVhttps://www.blogger.com/profile/10198704789965278981noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-79198797677418348792016-01-17T08:24:09.322-05:002016-01-17T08:24:09.322-05:00Thanks for the response and reference, and I am so...Thanks for the response and reference, and I am sorry for provoking another controversy. The answer may be that there is a spectrum of reasoning ability among humans (and other animals) and from where I am in it I will never reach your understanding, as chimpanzees will never understand lightning.<br /><br />However, my issue does not depend on the order of the terms. I listed them in the order JimVhttps://www.blogger.com/profile/10198704789965278981noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-19630313002183372472016-01-17T06:26:43.407-05:002016-01-17T06:26:43.407-05:00Jim,
Since you asked for a reference, I can recom...Jim,<br /><br />Since you asked for a reference, I can recommend <a href="http://www.amazon.com/Discrete-Continuous-Fundamental-Length-Physics/dp/1107062802" rel="nofollow">Amit Hagar's book "Discrete or Continuous?: The Quest for Fundamental Length in Modern Physics"</a>, which <a href="http://backreaction.blogspot.com/2014/09/is-there-smallest-length.html" rel="nofollow">I Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-25676270850560188572016-01-17T06:24:14.145-05:002016-01-17T06:24:14.145-05:00Maurice,
Ah, so you looked at a Wikipedia entry a...Maurice,<br /><br />Ah, so you looked at a Wikipedia entry and since it's vaguer than what I wrote, certainly I must be the one who misunderstood something. Interesting argument. Now please tell me exactly what mistake you think I made.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1251163887604312012016-01-17T06:07:59.015-05:002016-01-17T06:07:59.015-05:00Just take a look at the entry "Zeno's par...Just take a look at the entry "Zeno's paradoxes" in the Wikipedia, and you'll find that Jim has a point and your view of this issue is quite superficial. How can you write about subjects in your articles that you do not even know to a Wikipedia level?!Mauricehttps://www.blogger.com/profile/16375058316648610565noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-58331919140192971282016-01-17T03:32:30.656-05:002016-01-17T03:32:30.656-05:00Jim,
I don't know what you mean - it's a ...Jim,<br /><br />I don't know what you mean - it's a convergent series, the limit doesn't depend on the ordering. I'm not a historian and don't know if Zeno would have been surprised. But the point is that back then people didn't know how to show the series converges. Thus it was a paradox until someone could resolve it. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-82363751510158785332016-01-16T23:51:06.942-05:002016-01-16T23:51:06.942-05:00From the Discrete or Continuous article: "Tho...From the Discrete or Continuous article: "Though the [Zeno] paradoxes have now been solved ..."<br /><br />I read a book on the history of this which was supposed to convince me that Zeno was wrong, but it failed to do so. It seemed to me that mathematicians (cleverly) defined their way out of the problem. I would state Zeno's claim as follows (using the Arrow version of the paradoxJimVhttps://www.blogger.com/profile/10198704789965278981noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-46977324436130681662016-01-16T10:02:08.985-05:002016-01-16T10:02:08.985-05:00We feel your potential presence even in your absen...We feel your potential presence even in your absence. Aharonovâ€“Bohm effect!Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-86543346657585578992016-01-16T04:42:41.212-05:002016-01-16T04:42:41.212-05:00Your article in Quanta was really nice. Thanks.Your article in Quanta was really nice. Thanks.P aomhttps://www.blogger.com/profile/00422446896906629849noreply@blogger.com