tag:blogger.com,1999:blog-22973357.post8168103429373327456..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: No, you cannot test quantum gravity by entangling mirrorsSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger13125tag:blogger.com,1999:blog-22973357.post-63144597595635210692016-03-15T03:43:53.230-04:002016-03-15T03:43:53.230-04:00Lincoln,
I know - I am just writing on a new blog...Lincoln,<br /><br />I know - I am just writing on a new blogpost about Aspelmeyer's work. As should be clear from my blogpost above, I was criticizing the synopsis, not the paper. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-20739157552489758412016-03-14T14:07:47.484-04:002016-03-14T14:07:47.484-04:00Hi Sabine, just stumbled on your post. The point ...Hi Sabine, just stumbled on your post. The point is to test quantum mechanics with classical gravity. And the field doesn't originate with Penrose... Although yes he did some speculative work there a while ago on Phillip wrote. In case you're not aware of it, have a look at cavity optomechanics. E.g. http://aspelmeyer.quantum.at/ . The right theory for QM with Newtonian gravity is Lincoln Carrhttps://www.blogger.com/profile/06932071351479810756noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-72544392021533631442015-08-09T10:08:16.298-04:002015-08-09T10:08:16.298-04:00If you look back to first video, at approx 2:40 to...If you look back to first video, at approx 2:40 to 2:48 I see signs of the QC affirming such a knowledgeable approach regarding quantum Computing so who are these people one can be drawn too, that insight such <br /><br />YouTube video ( http://youtu.be/g7RqLbqDr4U ) M=0, as conformal symmetry......maximum symmetry...Delta E, Delta T of 30:00 to 31:13<br /><br />I really like the stereographic PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-16252546887595845152015-08-09T09:57:41.703-04:002015-08-09T09:57:41.703-04:00Hi MarkusM,
I think Penrose is looking for signs ...Hi MarkusM,<br /><br />I think Penrose is looking for signs of concentric rings in the CMB for a reason......so when you look at M=0 as a conformal symmetry he is mapping the Riemann sphere onto it and say quantum theory being a massless way in which to experience the world, has to have matter orientations that begin somewhere, so why not at the early universe where we place a big question mark PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-24136757623335854512015-08-09T02:07:27.370-04:002015-08-09T02:07:27.370-04:00Plato Hagel,
I don't know. But I can't rea...Plato Hagel,<br />I don't know. But I can't really see what the connection between quantum cognition and gravitationally induced state reduction should be. The latter (in theory) is a generic quantum effect, as it involves Planck's constant (because it involves the time energy uncertainty relation), whereas in phenomena related with quantum cognition no h-bar appears. That's why MarkusMhttps://www.blogger.com/profile/03431499396962852389noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-13050728856240657602015-08-08T08:44:29.286-04:002015-08-08T08:44:29.286-04:00MarkusM,
Wonder what Quantum Cognition community ...MarkusM,<br /><br />Wonder what Quantum Cognition community thinks about experiement.<br /><br />Best,PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-5287752264415404782015-08-07T04:06:42.173-04:002015-08-07T04:06:42.173-04:00"Penrose's model is neither particularly ..."Penrose's model is neither particularly useful ..."<br />At least it has triggered the setup of a highly sophisticated experiment:<br />https://www.youtube.com/watch?v=g7RqLbqDr4U<br /><br />Penrose recently gave an update on the status of the experiment (01:02-)<br />https://www.youtube.com/watch?v=zQ8Bm33o0uIMarkusMhttps://www.blogger.com/profile/03431499396962852389noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-49752705779585951452015-08-05T11:30:59.914-04:002015-08-05T11:30:59.914-04:00The experiment is designed to be operated on Earth...The experiment is designed to be operated on Earth at standard altitude yes. Besides that, the weight, for all I can tell, doesn't matter, since the gravitational interaction doesn't play a role. In any case, it wasn't my choice of words, I just picked it up from the headline, but it's not a relevant point. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-62154832159799456512015-08-05T11:07:19.089-04:002015-08-05T11:07:19.089-04:00"entangle the mirrors, or at least some of th..."<i>entangle the mirrors, or at least some of the electrons in some of their atomic orbits</i>" Conductive surface mirror or dielectric mirror? Massive quantum objects: neutron star cores (superfluid neutrons, superconductive protons), the LHC's liquid heium bath and magnets, LIGO's mirrors (maintained near ground state, effective microkelvin temperature, about 200 quanta). Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-87900450941501253152015-08-05T11:00:36.797-04:002015-08-05T11:00:36.797-04:00I take it that APS and you are both relying on a 1...I take it that APS and you are both relying on a 100g apple which in weight on earth is a one Newton force, right?Barhttps://www.blogger.com/profile/00964494372792180918noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-27689804290574541362015-08-05T10:31:14.157-04:002015-08-05T10:31:14.157-04:00Hi Phillip,
I think it is almost certainly true t...Hi Phillip,<br /><br />I think it is almost certainly true that gravitational degrees of freedom induce some decoherence in quantum systems, but I don't think the effect is as Penrose envisions it, and neither do I think it's actually necessary to invoke gravity in this business. Penrose's model is neither particularly useful, nor plausible, nor elegant, and my suspicion is had it Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-37495798399329729492015-08-05T10:27:14.486-04:002015-08-05T10:27:14.486-04:00Bert:
"A real superposition of life and deat...Bert:<br /><br />"A real superposition of life and death would not only be a contradiction, but because it cannot be observed, you can't tell that it is true or false."<br /><br />I think you'll have to clarify what you mean by 'real' before I can answer that question.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-26036447639622202932015-08-05T08:42:34.233-04:002015-08-05T08:42:34.233-04:00"Penrose’s idea is that gravity is the reason...<i>"Penrose’s idea is that gravity is the reason why we never observe quantum effects on large objects – such as cats that can’t decide whether to die or to live – and his model predicts that this influence of gravity should prevent us from endowing massive objects with quantum properties."</i><br /><br />What do you think of this idea of Penrose?<br /><br />Do you think that this idea Phillip Helbighttps://www.blogger.com/profile/12067585245603436809noreply@blogger.com