tag:blogger.com,1999:blog-22973357.post2201902892802615250..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Are you what you are or what?Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger75125tag:blogger.com,1999:blog-22973357.post-70031138639745389642009-11-05T11:04:40.376-05:002009-11-05T11:04:40.376-05:00An interesting interview with Alan Sokal which tou...An interesting interview with Alan Sokal which touches on some of the subjects mentioned here:<br /><br />http://www.philosophypress.co.uk/?p=802Arrownoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-42407366794722233202009-11-05T01:06:36.213-05:002009-11-05T01:06:36.213-05:00I would say we don't know whether it's mea...I would say we don't know whether it's meaningful.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-31090021629766977342009-11-04T20:56:18.551-05:002009-11-04T20:56:18.551-05:00Of course it was meant as a joke, but if you are g...Of course it was meant as a joke, but if you are going to be strictly instrumentalistic, you can't really talk about what people (think they) *are* :)<br /><br />I find the article very well written and interesting, but I feel Bee's criticisms to be valid too.<br /><br /> Bee, I wonder how much you agree with the section on space-time. It seems to say talking about space and time at Nirmalyahttps://www.blogger.com/profile/00482736027241310182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-47313164527929296832009-11-04T20:08:48.895-05:002009-11-04T20:08:48.895-05:00Arun see Generalization to other dimensions Two qu...Arun see <a href="http://en.wikipedia.org/wiki/Sphere#Generalization_to_other_dimensions" title="Spheres can be generalized to spaces of any dimension." rel="nofollow">Generalization to other dimensions</a> Two qubits? Spin orientations.PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-40564382697068576832009-11-04T16:28:02.577-05:002009-11-04T16:28:02.577-05:00This comment has been removed by the author.Arunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-77260229654749603952009-11-04T16:25:47.484-05:002009-11-04T16:25:47.484-05:00One of my favorite quotes from Weinberg's &quo...<i>One of my favorite quotes from Weinberg's "Dreams of a Final Theory" is in the anecdote about the erstwhile promising grad student who mysteriously dropped off the map. Weinberg asks his colleague what happened, and he sadly replies "He tried to understand quantum mechanics."</i><br /><br />To me the problem is that there is no systematic exposition of the bizarreness Arunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-43035036198688061492009-11-04T06:49:54.898-05:002009-11-04T06:49:54.898-05:00Hi Arun,
” ......claim that Edison discovered the...Hi Arun,<br /><br /><i>” ......claim that Edison discovered the light bulb” </i><br /><br />As your Sudoku puzzle I would say the light bulb stands as being both invention and discovery , as the idea for it sprang from the imagination of a human mind, working within the bounds and possibilities as they exist in the reality of the world. You could say this is what emergent phenomena stands as Phil Warnellhttps://www.blogger.com/profile/15671311338712852659noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-72520607979731527452009-11-03T22:29:38.035-05:002009-11-03T22:29:38.035-05:00In quantum teleportation, complete information abo...<i>In <a href="http://newsimg.bbc.co.uk/media/images/40279000/gif/_40279873_teleportation_info416.gif" rel="nofollow">quantum teleportation</a>, complete information about the quantum state of a particle is instantaneously transferred by the sender, who is usually called Alice, to a receiver called Bob. Quantum superposition, meanwhile, allows a particle to be in two or more quantum states at thePlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-90455590677150524892009-11-03T22:10:11.347-05:002009-11-03T22:10:11.347-05:00An EPR illusion that's been perpetrated...tell...An <a href="http://www.newton.cam.ac.uk/webseminars/hartle60/2-penrose/032.jpg" rel="nofollow">EPR illusion</a> that's been perpetrated...telling the second qubit which way to point...and if not travelling faster then light, then no information can travel between them?<br /><br />Susskind then has a problem with what is being describes inside the blackhole by using this in any thought PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-63098127970888198272009-11-03T17:01:12.930-05:002009-11-03T17:01:12.930-05:00Phil,
I then claim that Edison discovered the ligh...Phil,<br />I then claim that Edison discovered the light bulb. What element of choice was there to make it a creation of the human mind rather than something "out there" like the Platonists' sphere?<br /><br />-ArunArunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-30264262535724942902009-11-03T16:58:51.882-05:002009-11-03T16:58:51.882-05:00nv,
OK.
-Arunnv,<br />OK.<br />-ArunArunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-42339358986253501072009-11-03T14:34:55.247-05:002009-11-03T14:34:55.247-05:00hi arun,
no need to reply on that.
best,
nvhi arun,<br /><br />no need to reply on that.<br />best,<br />nvnvnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-18106690986601920082009-11-03T12:39:09.892-05:002009-11-03T12:39:09.892-05:00http://www.fqxi.org/data/forum-attachments/angry_s...http://www.fqxi.org/data/forum-attachments/angry_string_theorist.jpgRobert L. Oldershawhttps://www.blogger.com/profile/15396555790655312393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-49112157657060944912009-11-03T12:06:13.812-05:002009-11-03T12:06:13.812-05:00One of my favorite quotes from Weinberg's &quo...One of my favorite quotes from Weinberg's "Dreams of a Final Theory" is in the anecdote about the erstwhile promising grad student who mysteriously dropped off the map. Weinberg asks his colleague what happened, and he sadly replies "He tried to understand quantum mechanics."<br /><br />From this outsider's perspective, the problem with quantum philosophy appears to Low Math, Meekly Interactingnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-2651779210990399752009-11-03T05:04:32.543-05:002009-11-03T05:04:32.543-05:00Hi Plato,
Although I am certain I don’t share the...Hi Plato,<br /><br />Although I am certain I don’t share the power of intellect with those like Roger Penrose, the one thing I do have in common is to admit to being unashamed Platonist. Also, I share the sentiment expressed often by Penrose as to being somewhat mystified as to how in being a reductionist could lead many of his colleagues to believe there is no underpinning truth(s) to either Phil Warnellhttps://www.blogger.com/profile/15671311338712852659noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-21717025624514890782009-11-03T05:00:14.235-05:002009-11-03T05:00:14.235-05:00Hi Arun,
“Are Sudoku puzzles invented or discove...Hi Arun,<br /><br /><i> “Are Sudoku puzzles invented or discovered?” </i><br /><br />In my view they are both, as the puzzle itself being an invention. Yet with the rules that govern it being logic as expressed through mathematics being discoveries.<br /><br /><i>” In addition, there are no planets or stars that are spheres. It so happens that their globular shape can be well-approximated by a Phil Warnellhttps://www.blogger.com/profile/15671311338712852659noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-11835057252861333882009-11-02T13:00:40.281-05:002009-11-02T13:00:40.281-05:00It seems to me the author in question is pushing d...It seems to me the author in question is pushing defeatism as a good philosophical stance for quantum physics, as Arrow stated. The author makes broad sweeping generalizations, such as suggesting that there will never be something that stands in for the original ether. I believe there is a real and physical collection of quantum spaces that are point-like. However, unlike the original ether it Erichttps://www.blogger.com/profile/08213251864943443334noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-9663366768202915892009-11-02T12:54:51.123-05:002009-11-02T12:54:51.123-05:00Robert: Since you seem to be new here, scrape the ...Robert: Since you seem to be new here, scrape the self-ad, or I'll continue to delete your comments.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-8384407059442315012009-11-02T12:15:43.231-05:002009-11-02T12:15:43.231-05:00Quantum mechanics is better off as a branch of ma...Quantum mechanics is better off as a branch of mathematics rather than physics! Physicists have been debating for decades about quantum mechanics , without any general consensus.So it may be time to give an abstract axiomatization that brings quantum mechanics close to pure mathematics in Hilbert`s spirit!<br /><br />CheerseSerifohttps://www.blogger.com/profile/01564446107682541639noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-19734806554119045412009-11-02T12:05:19.663-05:002009-11-02T12:05:19.663-05:00The lessons of history are clear. The more exotic,...<i>The lessons of history are clear. The more exotic, the more abstract the knowledge, the more profound will be its consequences." <b>Leon Lederman,</b> from an address to the Franklin Institute, 1995 </i><br /><br />Hi Phil,<br /><br />You wrote:<i>I think that physics itself lends credence to the view that mathematics is a discovery, rather than an invention.</i><br /><br />This would PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-77678016370145680362009-11-02T11:11:18.723-05:002009-11-02T11:11:18.723-05:00hi arun,
classical space-time emerges from quant...hi arun,<br /><br />classical space-time emerges from quantum one when discontinues, ie. measurement jumps are "smoothed"(in mind), and so you have the illusion that time is continuous. perception is too slow to catch these discontinuities, like the eye is too slow to notice that movies are really set of stills that exchange at a rate of about 24 frames per second.<br />nvnvnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-72630246562459657972009-11-02T10:24:21.305-05:002009-11-02T10:24:21.305-05:00Yes. Feynman diagrams are an example for a tool fr...Yes. Feynman diagrams are an example for a tool frequently taken too seriously.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-67252287663959956852009-11-02T10:22:16.843-05:002009-11-02T10:22:16.843-05:00While I don't argue that appeal to intuition i...While I don't argue that appeal to intuition is no way to do physics, people do often forget the difference between mathematical and physical space, and I think that does sometimes hold back scientific thinking.<br /><br />We do sometimes put more faith into the tools that we have created than we should, and even seem to feel hesitant or guilty to modify them when evidence suggests that we Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-88866830216527465772009-11-02T10:07:05.411-05:002009-11-02T10:07:05.411-05:00Phil,
In addition, there are no planets or stars ...Phil,<br /><br />In addition, there are no planets or stars that are spheres. It so happens that their globular shape can be well-approximated by a sphere, but that is a mathematical idealization.Arunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-12700800907884946062009-11-02T10:03:06.336-05:002009-11-02T10:03:06.336-05:00Phil,
Are Sudoku puzzles invented or discovered?Phil,<br />Are Sudoku puzzles invented or discovered?Arunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.com