tag:blogger.com,1999:blog-18648436.post3134073633309074008..comments2023-12-22T08:30:21.301+00:00Comments on Wading Through Treacle: Diary: negative mass + Tintinhull + MontacuteNigel Seelhttp://www.blogger.com/profile/14407392760306614271noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-18648436.post-90792210554043081242017-04-22T17:12:10.081+01:002017-04-22T17:12:10.081+01:00The standard of comments was not high. You might g...The standard of comments was not high. You might get a better class of discussion on StackExchange although Bee would no doubt welcome a more intellectual thread at hers... .Nigel Seelhttps://www.blogger.com/profile/17960803873815821524noreply@blogger.comtag:blogger.com,1999:blog-18648436.post-55266330304873035712017-04-22T15:38:01.285+01:002017-04-22T15:38:01.285+01:00Re: Complete explanation. You may have noticed tha...Re: Complete explanation. You may have noticed that I have contributed to the BackReaction blog in a comment. <br /><br />Now a later commentator has asked me a related physics question! Will Sabine answer, or should I, or should all this go onto Stack Exchange?Royhttps://www.blogger.com/profile/17844610890344836500noreply@blogger.comtag:blogger.com,1999:blog-18648436.post-16773903511636359132017-04-20T13:26:36.005+01:002017-04-20T13:26:36.005+01:00Actually your Cavorite quote needs to be taken a l...Actually your Cavorite quote needs to be taken a little carefully. Yes, negative mass will fall down assuming it obeys the Weak Equivalence Principle (extended to negative mass). Generally in discussions this is what is assumed, ie<br /><br />Gravitational Mass = Inertial Mass<br /><br />even when that mass is negative.<br /><br />However in the above experiment one is dealing with "Effective Mass" inside a Quantum Simulation. This effective mass obeys an equation demonstrating that it is negative; and this behaviour has been demonstrated in the experiment. More precisely negative inertial mass has been demonstrated (in the simulation).<br /><br />There is no claim either way that the Weak Equivalence Principle holds here, in fact the expectation seems to be that the WEP will fail. In short:<br /><br />¬ WEP: (Negative) Simulated Effective Mass =/= (Negative) Gravitational Mass<br /><br />and so the Effective mass would move upwards in a Gravitational Field, just like a bubble. So it could be a Quantum Simulation of Cavorite, although that would have to be tested directly.<br /><br />Overall the "Effective Theory" to be found in material physics has some interesting properties, including negative mass - it transpires that the construct originates in the valence band theory of semiconductors (inspired by Dirac) with negative mass electrons - a form of these "electron holes" (WikiP qv).Royhttps://www.blogger.com/profile/17844610890344836500noreply@blogger.com