PDA

View Full Version : Knots, strings, and quantum theory


pdkgpznxenvlya@mailinator.com
Jul30-04, 03:21 AM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>\n\nIn their preprint quant-ph/0403228, "Quantum Knots",\nKauffman and Lomonaco propose that\nknots can represent particle states.\n\nIn the preprint cond-mat/0407140\n"A unification of light and electrons based on spin models"\nWen and Levin, completely independently, propose that\nparticles are made of extended entities.\n\nObviously, string theory, M-theory, loop quantum gravity\nand the like use similar models.\n\nAll seem to share one problem. If a particle is some\nsprt of knot with the tails going far away, how is\ninterference (e.g. in a two slit experiment) to be\nimagined? What happens to a particle/knot\nwhen paths split?\n\nIs there any simple answer to the issue? Do such\nissues play a role in string theory discussions?\n\njon\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">&nbsp;&nbsp;View this Usenet post in original ASCII form </a></div><P></jabberwocky>In their preprint http://www.arxiv.org/abs/quant-ph/0403228, "Quantum Knots",
Kauffman and Lomonaco propose that
knots can represent particle states.

In the preprint http://www.arxiv.org/abs/cond-mat/0407140
"A unification of light and electrons based on spin models"
Wen and Levin, completely independently, propose that
particles are made of extended entities.

Obviously, string theory, M-theory, loop quantum gravity
and the like use similar models.

All seem to share one problem. If a particle is some
sprt of knot with the tails going far away, how is
interference (e.g. in a two slit experiment) to be
imagined? What happens to a particle/knot
when paths split?

Is there any simple answer to the issue? Do such
issues play a role in string theory discussions?

jon

FrediFizzx
Aug4-04, 01:25 AM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>&lt;pdkgpznxenvlya@mailinator.com&gt; wrote in message\nnews:828cb1da.0407291327.30abe3b6@posting .google.com...\n|\n|\n| In their preprint quant-ph/0403228, "Quantum Knots",\n| Kauffman and Lomonaco propose that\n| knots can represent particle states.\n|\n| In the preprint cond-mat/0407140\n| "A unification of light and electrons based on spin models"\n| Wen and Levin, completely independently, propose that\n| particles are made of extended entities.\n|\n| Obviously, string theory, M-theory, loop quantum gravity\n| and the like use similar models.\n|\n| All seem to share one problem. If a particle is some\n| sprt of knot with the tails going far away, how is\n| interference (e.g. in a two slit experiment) to be\n| imagined? What happens to a particle/knot\n| when paths split?\n\nCan a single fermion split a path? Or only bosons?\n\nFrediFizzx\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">&nbsp;&nbsp;View this Usenet post in original ASCII form </a></div><P></jabberwocky><pdkgpznxenvlya@mailinator.com> wrote in message
news:828cb1da.0407291327.30abe3b6@posting.google.c om...
|
|
| In their preprint http://www.arxiv.org/abs/quant-ph/0403228, "Quantum Knots",
| Kauffman and Lomonaco propose that
| knots can represent particle states.
|
| In the preprint http://www.arxiv.org/abs/cond-mat/0407140
| "A unification of light and electrons based on spin models"
| Wen and Levin, completely independently, propose that
| particles are made of extended entities.
|
| Obviously, string theory, M-theory, loop quantum gravity
| and the like use similar models.
|
| All seem to share one problem. If a particle is some
| sprt of knot with the tails going far away, how is
| interference (e.g. in a two slit experiment) to be
| imagined? What happens to a particle/knot
| when paths split?

Can a single fermion split a path? Or only bosons?

FrediFizzx

cschiller
Aug12-04, 08:30 AM
Interesting references, aren't they.
So far, nobody seems to have studied this issue.
Kauffman said that he is still far from having
a solution.

Models of quantum theory are strongly out of fashion.
This is because most people do not believe that
a simple model for wavefunctions is possible.
They believe that this would be a kind of
hidden variables. in fact, I am not sure that this
is the case.
If you think there is a solution to the problem,
then the problem is probably quite hard.
But most probably, you will have to find a solution
yourself...

Christoph Schiller