tag:blogger.com,1999:blog-3722233.post6976871382979968922..comments2020-05-31T01:14:25.681-04:00Comments on Computational Complexity: Is the word Quantum being used properly by civilians? Understood by them? You know the answer.Lance Fortnowhttp://www.blogger.com/profile/06752030912874378610noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-3722233.post-45243492123684320312015-11-18T05:15:24.513-05:002015-11-18T05:15:24.513-05:00It is a melancholy object to observe weak uses of ...<a href="http://art-bin.com/art/omodest.html" rel="nofollow"><b>It is a melancholy object</b></a> to observe weak uses of the overburdoned word "quantum" … however it is agreed by all parties that <i>strong</i> uses of "quantum" are of considerable interest. I shall now therefore humbly propose my own thoughts, which I hope will not be liable to the least objection.<br /><br /><b>(Quantum) Considered Optional</b><br /><br />Readers of <i>Computational Complexity</i> are invited to verify that the arxiv presently holds seven preprints for 2015 that are written by the honorable Ed Witten and his collaborators. In regard to their use of the word "quantum", these seven preprints divide naturally into three categories:<br /><br />-----------<br />Two preprints employ the word "quantum" frequently in its accustomed "physics" sense; both are posted to arxiv [cond-mat] (condensed matter):<br /><br />• Fermion path integrals and topological phases (arXiv:1508.04715v1 [cond-mat]) "quantum" on 13 pages of 86<br /><br />• Three lectures on topological phases of matter (arXiv:1510.07698v1 [cond-mat]) "quantum" on 21 pages of 60<br /><br />-----------<br />One book-length preprint employs the word "quantum" frequently, but not as frequently as the words "category" and "natural":<br /><br />• Algebra of the infrared (arXiv:1506.04087v1 [hep-th]) "quantum" on 53 pages of 430 ("category" on 64 pages, "natural" on 106 pages)<br /><br />-----------<br />The remaining four preprints are broadly concerned with (what physicists call) "quantum" phenomena … and yet the word "quantum" appears infrequently or even (in one preprint) not at all.<br /><br />• The super period matrix with Ramond punctures (arXiv:1501.02499v1 [hep-th] ) "quantum" on 1 page of 60.<br /><br />• Filling the gaps with PCO's (arXiv:1504.00609v2 [hep-th]) "quantum" on 0 pages of 40.<br /><br />• An introduction to the web-based formalism (arXiv:1506.04086v1 [hep-th]) "quantum" on 3 pages of 46<br /><br />• More on gauge theory and geometric Langlands (arXiv:1506.04293v1 [hep-th]) "quantum" on 3 pages of 79<br /><br />-----------<br /><b>Conclusion</b> It is evident that cutting-edge (quantum) dynamical research scarcely requires the word "quantum" … to assist young researchers it is therefore recommended that "(quantum)" henceforth appear only parenthetically, such that the sense of the research is preserved even when the parenthetical (quanta) are omitted entirely.<br /><br />Please allow me to profess, in the sincerity of my heart, that I have not the least personal interest in endeavoring to promote this necessary work, having no other motive than the public good of the (quantum) STEAM community. John Sidleshttps://www.blogger.com/profile/16286860374431298556noreply@blogger.comtag:blogger.com,1999:blog-3722233.post-43916646644168556772015-11-16T16:54:19.359-05:002015-11-16T16:54:19.359-05:00well, Seth Lloyd's a professor of quantum mech...well, Seth Lloyd's a professor of quantum mechanical engineering http://www.hbs.edu/faculty/Pages/item.aspx?num=31826 ;-)Danielhttps://www.blogger.com/profile/14861523846129940899noreply@blogger.comtag:blogger.com,1999:blog-3722233.post-58939917391609400542015-11-16T14:22:49.361-05:002015-11-16T14:22:49.361-05:00A quantum leap is a discontinuous change in energy...A quantum leap is a discontinuous change in energy levels without assuming intermediate values. In conversation, the implication is that incremental changes were possible, but that the topic in question instead went directly to a very different state: I'd call the Large Hadron Collider a quantum leap in particle accelerator technology, since instead of building a series of colliders a few hundred GeV more powerful than the last, we jumped directly ahead by TeV.<br /><br />On the other hand, I wouldn't call the decline in genome sequencing costs a quantum leap, because although it's been incredibly dramatic, it's fallen steadily and fairly predictably.<br /><br />Of course,the phrase is misused, but I think the sense of 'big change' is properly understood as 'skipping over smaller changes'Paulhttps://www.blogger.com/profile/11679234404220837033noreply@blogger.comtag:blogger.com,1999:blog-3722233.post-61389418260001423682015-11-16T14:18:13.007-05:002015-11-16T14:18:13.007-05:00My favorite quote is from the 1956 movie Forbidden...My favorite quote is from the 1956 movie Forbidden Planet: "I'll bet any quantum mechanic in the service would give the rest of his life to fool around with this gadget"Lance Fortnowhttps://www.blogger.com/profile/06752030912874378610noreply@blogger.comtag:blogger.com,1999:blog-3722233.post-39472520097215597592015-11-16T13:29:04.006-05:002015-11-16T13:29:04.006-05:00+1 for the Rick and Morty reference+1 for the Rick and Morty referenceAnonymoushttps://www.blogger.com/profile/05260705122889615843noreply@blogger.com