In reply to David Roberson's message of Thu, 18 Apr 2013 10:51:07 -0400 (EDT): Hi, [snip] >Axil, > > >What happens to an electron that is in free space when it encounters a photon? > One could easily imagine that it merely changes momentum and energy relative >to our observation frame, but then you have to ask about the issue of time. > > >So, what does a free space electron that absorbs a photon
That's easy. A free space electron can't (permanently) absorb a photon. It can however have "Compton effect" encounter with the photon. I.e. the photon loses some of its energy to the electron (and changes in frequency as a result), and also exchanges some momentum with the electron. >behave like as compared to a free space electron that has more energy than one >at rest? Can you tell them apart by any measurement? Is there any reason to >expect the now more energetic electron to radiate when it is moving at a >greater, constant speed? > > >Dave > > > >-----Original Message----- >From: Axil Axil <janap...@gmail.com> >To: vortex-l <vortex-l@eskimo.com> >Sent: Thu, Apr 18, 2013 3:14 am >Subject: Re: [Vo]:QED and LENR+ > > > >...if an electron has spin 1/2 and a photon spin 1, then how does the > combination end up with spin 1? > > >Because that is what Wikipedia says. > >http://en.wikipedia.org/wiki/Polariton > >The polariton is a bosonic quasiparticle, and should not be confused with the >polaron, a fermionic one, e.g. an electron plus attached phonon cloud. >But your confusion is on-target. The spin of the polariton might well come >from the dipole that makes it up. >Electrons emit and adsorbed photons all the time and they still have ½ spin. >But your confusion has inspired burgeoning confusion on my part because the >article says that coupling times increases the probability of BEC formation. > > The article says >While strong optical coupling in the single-quantum limit provides tremendous >possibilities for quantum information processing through quantum >electrodynamic effects, (4, 5) it is through the use of strong optical >coupling in many particle systems that phenomena such as Bose-Einstein >condensation in the solid-state (6, 7) and low-threshold polariton lasing and >light emission (8, 9) have been discovered. >Also >Additional surface passivation that preserves the polaritonic nature of the >excitations at small nanowire diameters (22) allows us to push the observed >vacuum Rabi splitting to values of up to 200 meV in comparison to bulk values >of 82 meV. These results provide new avenues to achieve very high coupling >strengths (beyond bulk) potentially enabling application of exciting phenomena >such as Bose-Einstein condensation of polaritons, >In quantum electrodymanics (QED), coupling is another name for charge. In QED, >the photon is the charge carrier. Also in this confusing statement, could they >be saying that the charge of the polariton is greater than the electron? But >in this paper it looks like the authors are using the term in another way >related to photon coupling. > >I could be making bad inferences. >The photon coupling decreases the mass of the polariton by a factor of 10,000. >This could be the reason for the increase in BEC formation probability. >Charge of the polariton cannot be 16 times more powerful in a polariton than >in an electron; Can it? >I am learning this stuff also; I need to increase my proficiency in QED, >because the devil is in the details. Enlightenment is welcome for all those >who are kind enough to grant it. > >Cheers: Axil > > > > > >On Wed, Apr 17, 2013 at 11:57 PM, <mix...@bigpond.com> wrote: > >In reply to Axil Axil's message of Tue, 16 Apr 2013 20:39:24 -0400: >Hi, >[snip] > >>The capture time of the photon is important to the LENR+ reaction because >>while the photon and electron are combined, the electron becomes a boson >>with spin of 1. > > >...if an electron has spin 1/2 and a photon spin 1, then how does the >combination end up with spin 1? > >Regards, > >Robin van Spaandonk > >http://rvanspaa.freehostia.com/project.html > > > > > Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
