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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Dear David,<br>
<br>
You are (at least partially) right. <br>
<br>
Some comments: firstly one does not "go from a photon to an electron" - this conserves neither charge nor spin. One can, for example, go from two photons to an electron-positron or vice versa.<br>
<br>
Secondly, at the single photon level, the problem is related to that of "quantum collapse" - for example the simple emission (and subsequent absorption) of a quantum. In QED this is merely a probability, not a process. One really needs to understand this (simpler)
process before one even tries to say anything sensible about the detailed particle creation process.<br>
<br>
To address this one needs to work within a proper theory that underpins both photon and electron. One needs wavefunctions. - not just hand-waving. Martin and I are working on elements of this within our theoretical framework at the moment.<br>
<br>
I have no time to enter into a debate about this at the moment as it is far more productive to get on with solid work on the problem. I am, however, thinking of calling a workshop on these processes, to be held in or around Glasgow, during the summer.<br>
<br>
Regards, John W.<br>
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<div style="direction: ltr;" id="divRpF298769"><font face="Tahoma" color="#000000" size="2"><b>From:</b> General [general-bounces+john.williamson=glasgow.ac.uk@lists.natureoflightandparticles.org] on behalf of davidmathes8@yahoo.com [davidmathes8@yahoo.com]<br>
<b>Sent:</b> Wednesday, January 27, 2016 12:15 AM<br>
<b>To:</b> Nature of Light and Particles - General Discussion<br>
<b>Subject:</b> [General] Macroscopic quantum self-trapping<br>
</font><br>
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<div></div>
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<div id="yui_3_16_0_1_1453852558052_25492">All,</div>
<div id="yui_3_16_0_1_1453852558052_25492"><br>
</div>
<div id="yui_3_16_0_1_1453852558052_25492">I have had this concern that even with a model of a photonic electronic (pick any one), that we do not understand what the process(es) are to get from a photon to an electron. </div>
<div id="yui_3_16_0_1_1453852558052_25492"><br>
</div>
<div id="yui_3_16_0_1_1453852558052_25492">Here is another candidate process. By locking photons together in a lattice called macroscopic quantum self-trapping, the energy becomes a solid or fluid like object.</div>
<div id="yui_3_16_0_1_1453852558052_25492"><br>
</div>
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</tr>
<tr class="link-enhancr-element" id="yui_3_16_0_1_1453852558052_25979">
<td class="link-enhancr-element" colspan="8" id="yui_3_16_0_1_1453852558052_25978" style="height:1px; background-color:#e5e5e5; font-size:1px; border-collapse:collapse">
<div class="link-enhancr-element" id="yui_3_16_0_1_1453852558052_25977" style="height:1px; background-color:#e5e5e5; font-size:1px; line-height:0px">
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div id="yui_3_16_0_1_1453852558052_25492"><br id="yui_3_16_0_1_1453852558052_25871">
</div>
<div id="yui_3_16_0_1_1453852558052_25492"><br>
</div>
<div id="yui_3_16_0_1_1453852558052_25492">Best</div>
<div id="yui_3_16_0_1_1453852558052_25492"><br>
</div>
<div id="yui_3_16_0_1_1453852558052_25492">David</div>
</div>
</div>
</div>
</div>
</body>
</html>