tag:blogger.com,1999:blog-22973357.post3401243299264819265..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Book Review: “A Beautiful Question” by Frank WilczekSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-22973357.post-40482236815188923072015-10-04T08:44:11.183-04:002015-10-04T08:44:11.183-04:00Well, I don't believe "Penrose and some p...Well, I don't believe "Penrose and some philosophers"... Why would I?Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-43892598095622573972015-10-04T08:19:02.464-04:002015-10-04T08:19:02.464-04:00Bee,
If you believe Penrose and perhaps some philo...Bee,<br />If you believe Penrose and perhaps some philosophers(!!), everything in the universe is interconnected! Observed entanglement is an exception because of the limited accuracy.Our approximate local theories agree with experiments because of limited accuracy! Am I overstating the case?kashyap vasavadahttps://www.blogger.com/profile/10732897306667764590noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-69152358675847888652015-10-04T02:45:33.396-04:002015-10-04T02:45:33.396-04:00kashyap,
Not everything is connected with everyth...kashyap,<br /><br />Not everything is connected with everything. Entanglement is the exception rather than the rule. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-25127108621072391382015-10-03T13:56:53.735-04:002015-10-03T13:56:53.735-04:00Chris and Bee:
If I can throw in my two cents wort...Chris and Bee:<br />If I can throw in my two cents worth;whether you can measure entanglement or not,is based on your experimental accuracy. In principle, everything is entangled with everything else if you have infinite accuracy!! So I am reasonably sure that it has something to do with quantum origin of universe!kashyap vasavadahttps://www.blogger.com/profile/10732897306667764590noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-57249812513227879442015-10-03T11:10:49.829-04:002015-10-03T11:10:49.829-04:00Does entanglement occur naturally absent spontaneo...Does entanglement occur naturally absent spontaneous parametric down-conversion crystals? Natural fiberoptics (ulexite, satin spar gypsum) require a planet and reside in darkness. The universe is rich with lasers (Phase 1/3), lasers entangle (Phase 3/3), arXiv:0302023,1302.6444,1306.2074,1407.0944. <br /><br />http://images.iop.org/objects/phw/news/12/7/29/laser.jpg<br />Phase 2/3 - not Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-35475683959980478182015-10-03T05:04:55.973-04:002015-10-03T05:04:55.973-04:00It is a good question. I think of entanglement as ...It is a good question. I think of entanglement as an inevitability when you have quantum indeterminism plus conservation laws. So you don't know what value one thing has, but you do know what value two things must have, due to, say, conservation of angular momentum.<br />So it kind of arises as a result of more fundamental things, Possibly.Andrew Thomashttps://www.blogger.com/profile/11075608749064975687noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-22188324915533818292015-10-03T02:42:41.635-04:002015-10-03T02:42:41.635-04:00Chris,
That's a good question, I'll have...Chris, <br /><br />That's a good question, I'll have to think about whether entanglement does perform any critical function in the evolution of the universe (other than being used for quantum cryptography now). Off the hand I'd say no because it's too fragile. As to the foundations, I'm not sure what you mean. Entanglement is a consequence of quantum mechanics, you can't Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-32795401807133252822015-10-02T12:26:13.860-04:002015-10-02T12:26:13.860-04:00"our currently most fundamental theories, are..."<i>our currently most fundamental theories, are in essence mathematically precise implementations of symmetry requirements</i>" Empirical physics demands unending symmetry breakings. A filled 2-sphere in 3-space is maximally symmetric. Four cuts obtain either two left or two right shoes. Is beauty a styrofoam ball or <br /><br />http://www.mazepath.com/uncleal/coupe2.png<br />a Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-37937613848948346002015-10-02T10:37:37.995-04:002015-10-02T10:37:37.995-04:00We've got the beautiful question. May I be the...We've got the beautiful question. May I be the one to ask the stupid question. Two times stupid really: stupid for having nothing to do with this book; and stupid for just being stupid and making not a lot of sense on its own terms. <br /><br />In quantum theory, or if not there then one or more of the interpretations of quantum theory, does entanglement perform a critical function? Is it Anonymousnoreply@blogger.com