tag:blogger.com,1999:blog-22973357.post7970723008843450729..comments2021-03-06T17:03:55.781-05:00Comments on Sabine Hossenfelder: Backreaction: How to beat a cosmic speeding ticketSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger26125tag:blogger.com,1999:blog-22973357.post-33039028346124618732012-08-31T15:42:45.319-04:002012-08-31T15:42:45.319-04:00BTW, if this simple finger trap model starts emerg...BTW, if this simple finger trap model starts emerging as a law on macroscopic scales it would have deep philosophical implications for the best way to be in the world. It would say that most of the non violent core principles in some religions are in agreement with physics. The more you resist, the more you are bound to what you resist. The more you accept different points of view the more Erichttps://www.blogger.com/profile/08213251864943443334noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-71190703126901579382012-08-31T14:51:26.698-04:002012-08-31T14:51:26.698-04:00Hi Bee,
Getting back to my comments about gluons b...Hi Bee,<br />Getting back to my comments about gluons being quantum wormholes... They seem to work just like a Chinese finger trap. As long as there is no pulling tension between your two fingers your fingers are free to act independently of each other while still being enclosed by the trap. This is the asymptotic freedom phase. Once there is tension or, in the case of quarks, increased angular Erichttps://www.blogger.com/profile/08213251864943443334noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-77841103308415922492012-08-30T01:19:20.213-04:002012-08-30T01:19:20.213-04:00Hi Marcus,
Thanks for letting me know. I'm pr...Hi Marcus,<br /><br />Thanks for letting me know. I'm presently a little under time pressure and might not come around to contributing for a while, but I'll check it out if all deadlines have wooshed by. I put the paper on the arxiv yesterday because I want to submit an FQXi essay on the topic, and the paper is essentially the equations that I took out of the essay. So the FQXi essay willSabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-80188743311209798562012-08-29T22:34:56.924-04:002012-08-29T22:34:56.924-04:00Hi Bee,
Very interesting paper you just posted tod...Hi Bee,<br />Very interesting paper you just posted today<br />"A possibility to solve the problems with quantizing gravity" arxiv 1208.5874.<br /><br />I would like very much to see a blog post about this and read the discussion of it by your regular commenters. To me (from the sidelines) it seems an extraordinarily fertile idea. I've posted about the paper at PF--but so far no Marcushttps://www.blogger.com/profile/16920067392588425925noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-60526359560847031482012-08-27T05:50:44.387-04:002012-08-27T05:50:44.387-04:00Hi Bee,
sorry. I proved three times that I am no...Hi Bee,<br /><br />sorry. I proved three times that I am not a robot. May congratulations for the proof - extremely difficult with my eyesight- would prevent multiple proofs.Matti Pitkänenhttps://www.blogger.com/profile/13512912323574611883noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-6396460263720327662012-08-27T05:48:03.381-04:002012-08-27T05:48:03.381-04:00Hi Bee,
I see the notion of speed of light as a ...Hi Bee,<br /><br /> I see the notion of speed of light as a problem of this approach General Coordinate invariance allows to scale time coordinate and spatial l coordinates of M^4 and this changes the numerical value of parameter that we identify as speed of light. Variation of c would mean varying the choice for the units of time and length only. Speed of light depends on space-time Matti Pitkänenhttps://www.blogger.com/profile/13512912323574611883noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-39044962027091301222012-08-27T05:47:27.921-04:002012-08-27T05:47:27.921-04:00Hi Bee,
I see the notion of speed of light as a ...Hi Bee,<br /><br /> I see the notion of speed of light as a problem of this approach General Coordinate invariance allows to scale time coordinate and spatial l coordinates of M^4 and this changes the numerical value of parameter that we identify as speed of light. Variation of c would mean varying the choice for the units of time and length only. Speed of light depends on space-time Matti Pitkänenhttps://www.blogger.com/profile/13512912323574611883noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-73017033692399812482012-08-27T05:46:18.541-04:002012-08-27T05:46:18.541-04:00Hi Bee,
I see the notion of speed of light as a ...Hi Bee,<br /><br /> I see the notion of speed of light as a problem of this approach General Coordinate invariance allows to scale time coordinate and spatial l coordinates of M^4 and this changes the numerical value of parameter that we identify as speed of light. Variation of c would mean varying the choice for the units of time and length only. Speed of light depends on space-time Matti Pitkänenhttps://www.blogger.com/profile/13512912323574611883noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-80624634031409879362012-08-27T00:49:26.677-04:002012-08-27T00:49:26.677-04:00Hi StrangeRep,
Yes, that's right. And I do ha...Hi StrangeRep,<br /><br />Yes, that's right. And I do have a sentence in the paper on that :o) The speed of light itself is not actually a meaningful quantity to talk about in these other backgrounds. One should strictly speaking always be talking about the ratio relative to the speed in our background. In fact, you could go an normalize everything to our speed and then be left with a Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-34835362083911115702012-08-27T00:21:11.382-04:002012-08-27T00:21:11.382-04:00Forgive me for asking a question before studying y...Forgive me for asking a question before studying your paper in depth...<br /><br />Since c is a dimensionful quantity, a measurement of it in one background cannot reliably be distinguished from another background unless the backgrounds somehow also come with fixed mutually-compatible reference units. Or am I wrong about that?<br /><br />StrangeRephttps://www.blogger.com/profile/04613522691941941832noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-55464871992430098232012-08-26T15:38:02.355-04:002012-08-26T15:38:02.355-04:00Hi Bee,
I think you are wrong to give up on wormho...Hi Bee,<br />I think you are wrong to give up on wormholes. The problem in the conventional theory of wormholes is that they are presumed to be static and non- dissolving. This idea leads to immense energy requirements to create one. It's a non- starter on macroscopic scales. Don't pay attention to the cultural references to wormholes and all the hoaky things that go with it. Of course Erichttps://www.blogger.com/profile/08213251864943443334noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-85669406751752987542012-08-26T07:00:17.001-04:002012-08-26T07:00:17.001-04:00I remember that Bryce de Witt mentioned fuzzy ligh...I remember that Bryce de Witt mentioned fuzzy lightcones in his Sci. Am. Dec, 1983 article.<br />I think this is somewhat similar to your toy model of quantum gravity. Vincehttps://www.blogger.com/profile/14960204267566263300noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-27634313919118815112012-08-26T02:46:04.958-04:002012-08-26T02:46:04.958-04:00Zephir,
You evidently misunderstood what I wrote,...Zephir,<br /><br />You evidently misunderstood what I wrote, and moreover didn't read my paper. It is not about using entangled particles for communication. Best,<br /><br />B. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-64727044652567231882012-08-25T21:34:06.512-04:002012-08-25T21:34:06.512-04:00Hi Bee!
I think the #2 is the most likely if you ...Hi Bee!<br /><br />I think the #2 is the most likely if you think about the pheromone case. You wrote " There is then explaining to do why we have not noticed violations of Lorentz-invariance before", and ant could say " There is then explaining to do why we have not noticed violations of pheromone communication before."Daniel de França MTd2https://www.blogger.com/profile/01281817409696805377noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-59641924856692402462012-08-25T13:12:49.904-04:002012-08-25T13:12:49.904-04:00The idea of superluminal communication through ent...The idea of superluminal communication through entanglement is not new and it's studied extensively in both experimental, both theoretical ways. Of course, it's thorough general formulation in the rigorous language of quantum field theory may be quite demanding. IMO the caveat of this approach is in the assumption of collapse of quantum function of entangled pairs, which would still Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-68503393822064224752012-08-25T12:15:08.759-04:002012-08-25T12:15:08.759-04:00"evidence for Lorentz-invariance violation&qu..."<i>evidence for Lorentz-invariance violation</i>" The vacuum is trace isotropic toward fermionic matter - parity violations, symmetry breakings, Milgrom acceleration (anisotropy plus Noether's theorems). Vacuum anisotropy toward otherwise identical, enantiomorphic atomic mass distributions is measurable to 5×10^(-14) relative in <br /><a href="http://www.mazepath.com/uncleal/Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-41038345327486385822012-08-25T11:30:52.284-04:002012-08-25T11:30:52.284-04:00You say there are 3 options to superluminal signal...You say there are 3 options to superluminal signals: <br />"First, there are wormholes.(...)<br />Second, one can just break Lorentz-invariance and avoid special relativity altogether.(...) <br />Third, deformations of special relativity which avoid an explicit breaking of Lorentz-invariance by changing the Lorentz-transformations. (...)"<br /><br />I don't like wormholes, but I Jhttps://www.blogger.com/profile/01942050607289418780noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-61596865465880997072012-08-25T10:45:26.178-04:002012-08-25T10:45:26.178-04:00Hi Arun,
If the particle doesn't do any inter...Hi Arun,<br /><br />If the particle doesn't do any interaction it just stays where it is. If it does some scattering, it depends on the coupling between the different subspaces. This coupling is basically the parameterization that I have. So the question that I would ask is what fraction of jumping is compatible with the data that we have. However, to answer this one first has to compute the Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-79540787139505701902012-08-25T10:26:39.407-04:002012-08-25T10:26:39.407-04:00Hi Bee,
Once I have made a measurement and fixed...Hi Bee, <br />Once I have made a measurement and fixed my version of Minkowski space, how long does it take typically for the state to get a substantial, say 1%, component of other Minkowski spaces?<br /><br />Best,<br />AArunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-66367573957756056842012-08-25T10:16:01.164-04:002012-08-25T10:16:01.164-04:00Hi Giotis,
Well, that's the central assumptio...Hi Giotis,<br /><br />Well, that's the central assumption. Think of it as follows: If the metric isn't a function but an operator you expect that it can take on different values at once and exist in superpositions. The simplest possible case you can think of is a superposition of different Minkowski-spaces, which differ in the value of the speed of light. That's what I'm talking Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-58366778163500197082012-08-25T10:04:37.884-04:002012-08-25T10:04:37.884-04:00"But in each background it takes on a differe..."But in each background it takes on a different value. Ie, there's a background for c_1, c_2, c_3 and one for c_*"<br /><br />I mean why is that? Why that speed takes different values in each bckground?Giotishttps://www.blogger.com/profile/03594944884584261018noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-8542604456947557022012-08-25T09:47:15.019-04:002012-08-25T09:47:15.019-04:00Lastly,
The Crown of the Creation Syndrome
Mayb...Lastly,<br /><br /><a href="http://www.eskesthai.com/2012/08/the-crown-of-creation-syndrome.html" rel="nofollow">The Crown of the Creation Syndrome</a> <br /><br />Maybe some hints as to the experimental possibilities?<br /><br />Best,PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-46825447985444956162012-08-25T09:15:18.318-04:002012-08-25T09:15:18.318-04:00In the recent article `Conflict between anthropic ...<i>In the recent article `Conflict between anthropic reasoning and observation'(gr-qc/0303070) Ken D. Olum, using some inflation-based ideas and the anthropic premise that we should be typical among all intelligent observers in the Universe, arrives at the puzzling conclusion that `we should find ourselves in a large civilization (of galactic size) where most observers should be, while in PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-46435748842694932782012-08-25T08:51:16.135-04:002012-08-25T08:51:16.135-04:00....this preferred frame does not appear on the le...<i>....this preferred frame does not appear on the level of the Lagrangian</i><br /><br />Maybe Reimann's mathematical Hypothesis can help set perspective as something which would allow communication holes in between the numbers as sieves?<br /><br />http://2.bp.blogspot.com/-4oOs6kPHf08/Tbgc5PfaZ5I/AAAAAAAACpc/q8sc28plLVg/s1600/calvin1.gif<br /><br /> Satellite travel has some potential PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-58422727470732872422012-08-25T08:48:03.528-04:002012-08-25T08:48:03.528-04:00Massless particles always move with the speed that...Massless particles always move with the speed that's the invariant of the Lorentz-transformations. But in each background it takes on a different value. Ie, there's a background for c_1, c_2, c_3 and one for c_* which is the speed of light we have measured. In each background, massless particles move with the respective speed of light. But these speeds of light can differ from c_*.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.com