On Wednesday, April 22, 2020 at 6:43:22 PM UTC-6, Alan Grayson wrote: > > > > On Wednesday, April 22, 2020 at 6:09:43 PM UTC-6, Lawrence Crowell wrote: >> >> On Wednesday, April 22, 2020 at 3:48:24 PM UTC-5, Alan Grayson wrote: >>> >>> >>> >>> On Wednesday, April 22, 2020 at 2:39:45 PM UTC-6, Alan Grayson wrote: >>>> >>>> >>>> >>>> On Wednesday, April 22, 2020 at 10:19:52 AM UTC-6, Lawrence Crowell >>>> wrote: >>>>> >>>>> On Wednesday, April 22, 2020 at 8:21:30 AM UTC-5, Alan Grayson wrote: >>>>>> >>>>>> >>>>>> >>>>>> On Wednesday, April 22, 2020 at 5:22:23 AM UTC-6, John Clark wrote: >>>>>>> >>>>>>> On Wed, Apr 22, 2020 at 1:39 AM Alan Grayson <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>> > Could it be the case that Casimir plates attract each other due >>>>>>>> to electrostatic forces and not vacuum energy? >>>>>>> >>>>>>> >>>>>>> Of course not! Don't you thing getting rid of electrostatic forces >>>>>>> would be the very first thing any even halfway competent experimental >>>>>>> scientists would think of before he even dreamed of performing such a >>>>>>> super >>>>>>> delicate experiment? >>>>>>> >>>>>>> John K Clark >>>>>>> >>>>>> >>>>>> Experiments done on the space shuttle and in Germany (where free fall >>>>>> is simulated) have shown that dust particles accumulate due to >>>>>> electrostatic forces, thus changing the model for how planets formed. >>>>>> And >>>>>> if you read the excerpt from the Wiki article I posted, MIT physicists, >>>>>> in >>>>>> 1997 IIRC, were able to explain the Casimir effect without appealing to >>>>>> vacuum energy. AG >>>>>> >>>>> >>>>> If the two Casimir plates are grounded there will be no electrostatic >>>>> potential between them. Elementary electricity. >>>>> >>>>> LC >>>>> >>>> >>>> I'm not sure how the MIT physicist did the experiment. I just know the >>>> claim; that he accounted for the forces on the plates without need of >>>> appealing to vacuum energy. I'll see if I can find the paper and post it. >>>> AG >>>> >>> >>> Try this, by another physicist: >>> Proof that Casimir force does not originate from vacuum energy >>> https://arxiv.org/abs/1605.04143 AG >>> >> >> There has to be something wrong. For one he says the EM Hamiltonian >> commutes with the matter Hamiltonian, and so there is no interaction >> between the EM field and matter. This would be the case if the matter >> possesses no charges. There can be two Hamiltonians that commute with each >> other, and it is the case the two sectors are independent. However, there >> is the interaction H_i = ∫d^4x j*A that the two operators separately do not >> have involution with. This is where the interaction happens. So I have >> suspicions about this claim. >> >> LC >> > > Then try this: The Casimir Effect and the Quantum Vacuum > https://arxiv.org/abs/hep-th/0503158 AG >
The above is authored by Robert L. Jaffe, another heavy dude! https://web.mit.edu/physics/people/faculty/jaffe_robert.html AG -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/a9d4b8fa-8883-43a7-b737-bf35be4c4f6e%40googlegroups.com.
