tag:blogger.com,1999:blog-22973357.post353182439077182932..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: ESQG 2012 - Conference SummarySabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger26125tag:blogger.com,1999:blog-22973357.post-28459778614545050242012-11-05T12:44:18.295-05:002012-11-05T12:44:18.295-05:00A lost generation? M. Shifman provides an "im...<a href="http://arxiv.org/abs/1211.0004" rel="nofollow">A lost generation</a>? M. Shifman provides an "impressionistic portrait" of the current state of particle theory. I wouldn't call the contemporary physicists a "lost generation" - rather the generation which completely misunderstood the practical meaning of its own insights.Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-73441844613412733602012-11-03T13:48:44.402-04:002012-11-03T13:48:44.402-04:00/* ..you might have noticed there are other forces.../* ..you might have noticed there are other forces in nature besides general relativity which prevent that everything which collides forms black holes..*/<br /><br />Just these forces are manifestation of extradimensions, as they're violating the inverse square law. They should be predicted with quantum gravity theory.Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-2889819882035829412012-11-03T01:36:08.647-04:002012-11-03T01:36:08.647-04:00Zephir:
I think you're confusing superpositi...Zephir: <br /><br />I think you're confusing superpositions with wavepackets, not the same thing. Also, you might have noticed there are other forces in nature besides general relativity which prevent that everything which collides forms black holes, which is why we're here and which is why atomic nuclei don't just collapse to a point. <br /><br /><i>"I wanted to illustrate the Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-88549767202069770742012-11-02T10:21:50.921-04:002012-11-02T10:21:50.921-04:00/* please refrain from elaborating on your "t.../* please refrain from elaborating on your "theories" here..*/<br /><br />My theory is solely independent to quantum mechanics and general relativity. I wanted to illustrate the contemporary situation with interpretation MAINSTREAM physics theories instead. <br /><br />So, have a nice weekend, you've enough of private problems already, as I can read...;-)Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-8108799109731781282012-11-02T10:16:47.579-04:002012-11-02T10:16:47.579-04:00/*..General Relativity does not predict that ".../*..General Relativity does not predict that "all massive objects collide into singularities." */<br /><br />Wheeler's geon concept was abandoned just with respect to finding, all objects formed with space-time curvature only are predestined to end with pin-point singularity with no mercy, when only general relativity was taken into account.<br /><br /><br />/* quantum mechanics Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-54499578291572565522012-11-02T10:05:24.354-04:002012-11-02T10:05:24.354-04:00Zephir: First, General Relativity does not predict...Zephir: First, General Relativity does not predict that "all massive objects collide into singularities." Second, quantum mechanics does not predict that "all objects are formed with quantum wave-packets", whatever that is supposed to mean. Also, there are different dispersion relations. Third, we understand the structure of atomic nuclei very well, there's no evidence forSabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-22775757880856749612012-11-02T09:58:27.398-04:002012-11-02T09:58:27.398-04:00/* atomic nuclei are vastly too large to be black .../* atomic nuclei are vastly too large to be black holes of the same mass*/<br />Yes, general relativity predicts, all massive objects would collide into singularities. But the quantum mechanics predicts instead, all objects are formed with quantum wave packets, which do expand into infinite volume in accordance to Schrodinger equation of free particles. So that the apparent puffiness of atom Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-86060751885720987072012-11-02T02:42:10.553-04:002012-11-02T02:42:10.553-04:00Hi Shantanu,
Sorry, I don't know what's u...Hi Shantanu,<br /><br />Sorry, I don't know what's up with the missing talks. If they're not up by next week I'll inquire. Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-65161359225235682462012-11-02T02:31:57.041-04:002012-11-02T02:31:57.041-04:00Zephir: To begin with atomic nuclei are vastly too...Zephir: To begin with atomic nuclei are vastly too large to be black holes of the same mass, they also have substructure as you might have heard. <a href="http://backreaction.blogspot.com/2011/06/extra-dimensions-at-lhc-status-update.html" rel="nofollow">Micro black holes at the LHC have been looked for - and not been found.</a> I also believe I've told you that several times already. Best,<Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-13551878085502041992012-11-01T17:38:15.818-04:002012-11-01T17:38:15.818-04:00/* you evidently believe black hole jets are gravi.../* you evidently believe black hole jets are gravitons */<br /><br />Nope, I don't believe it. Why the atom nuclei prepared at LHC COULDN'T be the micro-black holes <a href="http://news.sciencemag.org/sciencenow/2010/01/22-01.html" rel="nofollow">stabilized with extradimensions</a>?Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-53847814214409456532012-11-01T14:17:17.904-04:002012-11-01T14:17:17.904-04:00Bee,
are all talks posted?
According to http://www...Bee,<br />are all talks posted?<br />According to http://www.perimeterinstitute.ca/Events/Experimental_Search_for_QG/Schedule/<br />I don't see the talks on Oct 23rd afternoon posted.<br />(for eg starting from John Kelley)<br /><br />Also you can see he conference collection if you click on the same conference title from 2007 (and in the end)Shantanuhttps://www.blogger.com/profile/16322812456382858228noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-75223559437854855222012-11-01T11:31:29.435-04:002012-11-01T11:31:29.435-04:00Zephir: I have no clue whatsoever what you think w...Zephir: I have no clue whatsoever what you think which region of what parameter somebody has excluded, or by which means they have done so. That you evidently believe black hole jets are gravitons and LHC collisions form atom nuclei that are black holes, as well as plenty of previous comments that are little more than a meaningless assembly of words you probably picked up elsewhere, lets me doubtSabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-55493283759937128832012-11-01T11:13:51.741-04:002012-11-01T11:13:51.741-04:00Well, WHY the quantum gravitists excluded the regi...Well, WHY the quantum gravitists excluded the region between dimensional mass/energy density scale of quantum mechanics and general relativity?<br /><br />Isn't the QG supposed just to find common solution of these two theories - i.e. to INTERPOLATE between them?<br /><br />And plz, try to argue with my question - not with my person. My person, POV or qualification are solely irrelevant to Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-11121223793398559722012-11-01T11:11:50.291-04:002012-11-01T11:11:50.291-04:00This comment has been removed by the author.Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-84989748074368696422012-11-01T10:02:37.109-04:002012-11-01T10:02:37.109-04:00Or really easy, depending on your perspective. Or really easy, depending on your perspective. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-27908727236563986032012-11-01T10:02:09.038-04:002012-11-01T10:02:09.038-04:00Zephir: It is really difficult to solve a problem ...Zephir: It is really difficult to solve a problem if you haven't understood what the problem is. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-70689838718198428322012-11-01T09:57:07.672-04:002012-11-01T09:57:07.672-04:00/*..Experimental Search for Quantum Gravity ..*/
Q.../*..Experimental Search for Quantum Gravity ..*/<br />Quantum Gravity is everything between dimensional scales of quantum mechanics and general relativity, i.e. all objects at the human observer scale. There's no need to search for them experimentally.<br /><br />/*..constraints on scenarios in which the speed of highly energetic photons might be slower as well as on the case in which it Zephirhttps://www.blogger.com/profile/06010623752049244967noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-41643075844068450222012-10-31T06:17:08.630-04:002012-10-31T06:17:08.630-04:00It's the Big Snap, not the Big Rip. Reference...It's the Big Snap, not the Big Rip. Reference is http://arxiv.org/abs/1108.3080 (now published in PRD). Max could have titled the paper "Life, the Universe and Everything". :-) It's in section IV.A.3. Max mentions the GRB dispersion (or, rather, lack of it) but doesn't provide a reference.<br />Phillip Helbighttps://www.blogger.com/profile/12067585245603436809noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-69898857404680858332012-10-31T02:22:52.983-04:002012-10-31T02:22:52.983-04:00Hi Phillip,
Thanks, fixed that. I've never he...Hi Phillip,<br /><br />Thanks, fixed that. I've never heard of that argument from Tegmark, do you have a reference? Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-28414461713878999162012-10-31T00:28:16.456-04:002012-10-31T00:28:16.456-04:00Cool Group Picture :)Cool Group Picture :)PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-81732105699976281672012-10-30T12:39:52.577-04:002012-10-30T12:39:52.577-04:00Tegmark uses the independence of the speed of ligh...Tegmark uses the independence of the speed of light on frequency as seen in GRBs as a constraint making the "Big Rip" less likely.<br />Phillip Helbighttps://www.blogger.com/profile/12067585245603436809noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-68302914749117903732012-10-30T12:38:38.063-04:002012-10-30T12:38:38.063-04:00installation ---> instalmentinstallation ---> instalmentPhillip Helbighttps://www.blogger.com/profile/12067585245603436809noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-67496830440603026312012-10-30T11:50:10.755-04:002012-10-30T11:50:10.755-04:00Perhaps centralized political correctness is threa...Perhaps centralized political correctness is threatened by rational dissenting voices. Thanks for your work, Bee, blog and comments. Glassblowing offers a beautiful universe. It is no less beautiful for requiring crocheted hyperbolic outputs,<br /><br />Google<br />crochet hyperbolic 142,000 hits<br />Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-82070049328922340622012-10-30T11:31:01.301-04:002012-10-30T11:31:01.301-04:00Correct atom densities to RbNO_3 21.21 atoms/nm^3 ...Correct atom densities to RbNO_3 21.21 atoms/nm^3 and CsNO_3 18.81 atoms/nm^3. Pesky unit conversions. The exposition is otherwise unchanged.<br />Uncle Alhttps://www.blogger.com/profile/05056804084187606211noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-19264412616442708152012-10-30T11:29:01.709-04:002012-10-30T11:29:01.709-04:00Hi Uncle,
Thanks, fixed the typo. For reasons I d...Hi Uncle,<br /><br />Thanks, fixed the typo. For reasons I don't understand almost all of your comments end up in the spam queue. Sorry about that, but for all I know there isn't anything I can do about it. I check it on occasion, so sooner or later they will appear. Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.com