tag:blogger.com,1999:blog-22973357.post5139828433718063390..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: How Heisenberg Became UncertainSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger152125tag:blogger.com,1999:blog-22973357.post-11623446904143083102020-05-06T08:05:52.430-04:002020-05-06T08:05:52.430-04:00The Heisenberg argument you describe uses the old ...The Heisenberg argument you describe uses the old QT and justifies the existence of incompatible observables. In the new QT (post 1926) one has a similar looking expression whose meaning is entirely different! Namely, a relation between the standard deviations of two observables given any particular quantum state.Prof. David Edwardshttps://www.blogger.com/profile/16079658994584920395noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-87653131605910516612020-04-26T05:30:52.644-04:002020-04-26T05:30:52.644-04:00Steve Bullfox1:31 PM, April 25, 2020
"Probab...Steve Bullfox1:31 PM, April 25, 2020<br /><br />"Probably the best argument against fine tuning is simply to ask where is everybody? "<br />This isn't an argument against fine-tuning - fine-tuning apologists would just say if you tweak the fundamental constants "a little" we wouldn't be here. There is zero evidence of fine-tuning of the universe because (i) there is noSteven Evanshttps://www.blogger.com/profile/13898046706669437332noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-89101246453810490272020-04-25T13:31:07.558-04:002020-04-25T13:31:07.558-04:00Steve Evans,
Probably the best argument against fi...Steve Evans,<br />Probably the best argument against fine tuning is simply to ask where is everybody? My relative, who does not believe in evolution also believes the earth is 6,000 years old which if it were true would make evolution problematic.<br /><br />I think people who don't believe in evolution don't much consider how old the earth is. Likewise, people look at the one example Steve Bullfoxhttps://www.blogger.com/profile/13990244011256349875noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-62095273167467863012020-04-25T03:47:50.379-04:002020-04-25T03:47:50.379-04:00Steve Bullfox6:09 PM, April 24, 2020
" Like ...Steve Bullfox6:09 PM, April 24, 2020<br /><br />" Like I have written before, not especially "fine" tuning. "<br />Fine-tuning includes the idea of a fine-tuning mechanism (a la piano tuner) and the idea of a large number of trials leading to an outcome which is low probability per trial (a la lottery win). Obviously, there may be fine-tuning within the universe (e.g. piano Steven Evanshttps://www.blogger.com/profile/13898046706669437332noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-71976993833911876172020-04-25T03:33:54.354-04:002020-04-25T03:33:54.354-04:00Steve Bullfox6:09 PM, April 24, 2020
"I don&...Steve Bullfox6:09 PM, April 24, 2020<br /><br />"I don't think if does much good on this blog to rant about fine tuning."<br />Fortunate, then, that I haven't. I have written mostly comments relevant to the OP against thinking concepts in the mind or artefacts in models are real without empirical evidence (the fundamental point of natural science) e.g. fine-tuning, inflation, Steven Evanshttps://www.blogger.com/profile/13898046706669437332noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-70743189499275300422020-04-24T23:26:11.055-04:002020-04-24T23:26:11.055-04:00Dave, I see. I can see David Bailey's point to...Dave, I see. I can see David Bailey's point to some extent. I wouldn't hold your breath on evidence of gods - it is an idea very specific to primitive humans - there's no reason to think it has any connection with reality. Philip Helbig has promised to publish a paper on fine-tuning - so we have that to look forward to during the lockdown.Steven Evanshttps://www.blogger.com/profile/13898046706669437332noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-61011237831892100682020-04-24T18:09:17.476-04:002020-04-24T18:09:17.476-04:00Steve Evans,
I don't think if does much good o...Steve Evans,<br />I don't think if does much good on this blog to rant about fine tuning. There are not that many here who support that idea. But if you wanted try your hand on a blog somewhat more supportive of that idea, here is some ammunition:<br /><br />In the February 3rd issue of Nature there is an article by an experimenter at Tokyo University who calculated the likely hood of the Steve Bullfoxhttps://www.blogger.com/profile/13990244011256349875noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-47189172731703405182020-04-24T04:34:16.019-04:002020-04-24T04:34:16.019-04:00Steven Evans,
I like your questions well enough I...Steven Evans,<br /><br />I like your questions well enough I will give my answers:<br /><br />Steve: Do you think Philip Helbig and Luke Barnes are trolling when they claim without evidence that the universe is fine-tuned and refuse to provide evidence when asked to do so repeatedly?<br /><br />Dave: No, Phil, at least is smart and seems to be honest.<br /><br />Steve: Should we not point out PhysicistDavehttps://www.blogger.com/profile/11111405959451703182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-21121162623211620952020-04-24T04:26:10.023-04:002020-04-24T04:26:10.023-04:00Ivan from Union,
Lorraine is no crazier than most...Ivan from Union,<br /><br />Lorraine is no crazier than most people here or most human beings. (I can't judge whether she is saner or crazier than me: a man ought not to be a judge in his own case!)<br /><br />She has a distinctive view that certain types of logical thought can only be a product of <i>minds</i> rather than inanimate objects, though we can build objects that mechanically PhysicistDavehttps://www.blogger.com/profile/11111405959451703182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-25239344202481838822020-04-24T02:48:25.023-04:002020-04-24T02:48:25.023-04:00Folks,
If I were to cut out everyone who I think ...Folks,<br /><br />If I were to cut out everyone who I think is posting nonsense here, I might as well save myself the effort of having a comment section to begin with. I am merely trying to avoid or at least discourage commenters who are disruptive in one way or the other, either by insulting others or by clogging the thread with off-topic remarks or being a nuisance in other ways, eg by Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-50309247086424269772020-04-23T21:08:34.180-04:002020-04-23T21:08:34.180-04:00David Bailey7:55 AM, April 23, 2020
Just to ensur...David Bailey7:55 AM, April 23, 2020<br /><br />Just to ensure you are not being biased, can you disclose your positions on the following points?<br />1) Do you think there is any evidence that the universe is fine-tuned?<br />2) Do you believe baby Jesus' father or some "god" "made" the universe?Steven Evanshttps://www.blogger.com/profile/13898046706669437332noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-3451428443349343562020-04-23T20:15:21.846-04:002020-04-23T20:15:21.846-04:00A former LEP expermentalist [sic] wrote to me:
>...A former LEP expermentalist [sic] wrote to me:<br />>Whether the information is getting lost or becomes imperceptible doesn't make any difference. This is not related to any possible physical observation for very principal reasons. Thus it has no relation to physical science, which is meant to understand and describe our real world observations.<br /><br />Well... as it happens, I was bornPhysicistDavehttps://www.blogger.com/profile/11111405959451703182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-71964683210201993112020-04-23T20:08:53.715-04:002020-04-23T20:08:53.715-04:00David Bailey7:55 AM, April 23, 2020
Do you think ...David Bailey7:55 AM, April 23, 2020<br /><br />Do you think Philip Helbig and Luke Barnes are trolling when they claim without evidence that the universe is fine-tuned and refuse to provide evidence when asked to do so repeatedly? <br /><br />Should we not point out when physicists are being cranks or frauds because we might upset them?Steven Evanshttps://www.blogger.com/profile/13898046706669437332noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-18607114483746535102020-04-23T13:17:55.331-04:002020-04-23T13:17:55.331-04:00Sorry for not being able to expound further, Sabin...Sorry for not being able to expound further, Sabine, but the same goes for Lorraine Ford. None of what she states has any validity and the differences and similarities between "representation" and "being" are irretrievably lost on her: completely invisible. She is not trying to eat a steak in one bite, she is trying to eat a whole bull.Ivan from Unionhttps://www.blogger.com/profile/05003869700062817289noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-68703335939633587852020-04-23T10:01:00.289-04:002020-04-23T10:01:00.289-04:00An interesting document for perusal is a 1927 arti...An interesting document for perusal is a 1927 article by Heisenberg "Physical Content of Quantum kinematics and Mechanics," which can be located in the 1983 Wheeler/Zurek compendium, or pdf file online (at NASA technical reports server). Heisenberg concludes: "quantum mechanics establishes the final failure of causality."Gary Alanhttps://www.blogger.com/profile/15299444226289034923noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-44578799058261550772020-04-23T08:50:33.182-04:002020-04-23T08:50:33.182-04:00Hey Dave,
"Well, the short answer is the inf...Hey Dave,<br /><br />"Well, the short answer is the information is not really lost -- it just becomes imperceptible to us humans. I assume you are familiar with the two-slit experiment. Imagine that you look at the output of the two-slit experiment but with blurry vision: the interference pattern will just blur out and you will just see the average classical result."<br /><br />You may Soulmanhttps://www.blogger.com/profile/08884551782946824614noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-84689967400528761632020-04-23T08:07:03.812-04:002020-04-23T08:07:03.812-04:00One doesn't know anything about the color yell...One doesn't know anything about the color yellow unless one has read The Potters of Firsk by Jack Vance.martenhttps://www.blogger.com/profile/02423871089614417690noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-33486184097054527472020-04-23T07:58:15.774-04:002020-04-23T07:58:15.774-04:00Sabine, I suspect Dirk Freyling is trolling, pleas...Sabine, I suspect Dirk Freyling is trolling, please consider cutting him outDavid Baileyhttps://www.blogger.com/profile/06172248428321078417noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-58657712053883698912020-04-23T07:55:37.159-04:002020-04-23T07:55:37.159-04:00Sabine, I think Steven Evans is trolling - please ...Sabine, I think Steven Evans is trolling - please consider cutting him out.David Baileyhttps://www.blogger.com/profile/06172248428321078417noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-74614990940040183462020-04-23T05:10:14.848-04:002020-04-23T05:10:14.848-04:00A former LEP expermentalist asked me:
>I unders...A former LEP expermentalist asked me:<br />>I understand quite well what you mean! That does not change the fact, that there is an information loss! IMHO, this information loss is not taken correctly into account, if you want to talk about Decoherence. Do you have any idea, how the information loss could be taken correctly into account, if we are talking about macroscopic objects like viruses,PhysicistDavehttps://www.blogger.com/profile/11111405959451703182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-53415344198433790932020-04-23T03:55:30.692-04:002020-04-23T03:55:30.692-04:00David Bailey5:46 PM, April 21, 2020
As you are in...David Bailey5:46 PM, April 21, 2020<br /><br />As you are interested in stopping trolling, did you write to Brian Schmidt, Physics Nobel Prize winner, to ask why he wrote a preface for Fortunate Universe, a trolling book written by professional astrophysicists claiming ludicrously that there is evidence for fine tuning of the universe and that this could be explained by a multiverse or the Steven Evanshttps://www.blogger.com/profile/13898046706669437332noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-84054802862363888662020-04-23T03:21:13.852-04:002020-04-23T03:21:13.852-04:00Stefan Freundt wrote to me:
>With the standard ...Stefan Freundt wrote to me:<br />>With the standard model, I still lack an explanation of the double-slit experiment.<br />>I believe that objects like electrons and photons really exist.<br />>And I believe that these objects have a certain appearance and certain rules.<br />>And I would like to know these rules.<br /><br />Well, Stefan, so would I. So would I.<br /><br />But, you PhysicistDavehttps://www.blogger.com/profile/11111405959451703182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-19114921437727152822020-04-23T02:57:41.684-04:002020-04-23T02:57:41.684-04:00I don't want to waste a lot of time on crackpo...I don't want to waste a lot of time on crackpottery, but in case anyone is in doubt, yes, our friend Dirk Freyling's claims are utter nonsense.<br /><br />As to his question:<br />>However, the Heisenberg uncertainty principle is only applicable for point-shaped particles. In this sense, how would one interpret the double slit experiments with protons, neutrons or atoms PhysicistDavehttps://www.blogger.com/profile/11111405959451703182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-40774733182705750462020-04-23T01:38:41.436-04:002020-04-23T01:38:41.436-04:00David,
I have nothing to do with the software und...David,<br /><br />I have nothing to do with the software underlying this site. Blogger is hosted by Google. You should take complaints about the website functionality to the Google forums, not to me. <br /><br />Having said that, I usually do read comments that are directly addressed to me. So, short of a report-button, just leave a comment saying "Sabine, commenter XYZ is trolling, please Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-72462596912685322212020-04-23T01:34:05.280-04:002020-04-23T01:34:05.280-04:00Louis,
Sorry to have shattered your illusions ;) ...Louis,<br /><br />Sorry to have shattered your illusions ;) It's even worse, I can't fly either.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.com