Big Bang in Dublin

Italo Vecchi

<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>Hawking\'s Dublin argument ([1]) about black holes applies as well to\nwhite holes , the only difference being a change of sign. Since we\ncannot be sure of the presence of a white hole, there are histories\nover topologically trivial metrics bypassing the singularity. In as\nmuch as the big bang can be assimilated to a white hole ([2]) the\nargument applies to it too (*), i.e. there must be information flowing\nour way in time from behind the "initial" singularity.\n\nThere are stellar objects that may lend observational relevance to\nthis remark. The "standard candle" criterion provides strong\nevidence for an expanding universe, but its application to, say,\ndistant supernovae requires a nonnull cosmological constant\n([3],[4]).\nIf one dislikes dark energy, as I do, one may speculate that, unlike\nmost other objects we see in the sky, distant supernovae reveal\ninformation that did not pour out of the big bang but which reaches us\nalong paths over topologically trivial metrics, skimping the\nsingularity.\n\n\nIV\n\n(*) the point being whether an initial singularity with unitary\namplitude is detemined by running the current state of the universe\nbackwards in time, i,e. paraphrasing Hawking, wheter we can be sure\nthe initial singularity forms.\n\n[1] http://pancake.uchicago.edu/%7Ecarroll/hawkingdublin.txt\n[2] http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/universe.html\nnotice the remark: "Outside a white hole event horizon there are\nworld lines which can be traced back into the past indefinitely\nwithout ever meeting the white hole singularity whereas in a FRW\ncosmology all worldline originate at the singularity."\n[3] http://www.slac.stanford.edu/econf/C990809/docs/perlmutter.pdf\n[4] http://olympus.het.brown.edu/pipermail/spr/Week-of-Mon-20030922/013841.html\n____________________________\n\n"Mensionis quaestionem expellas furca, tamen usque recurret"\n\n"You may chase the measurement problem away with a pitchfork, yet in\nthe end it will come back".\n\nHorace&IV\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">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>Hawking's Dublin argument ([1]) about black holes applies as well to
white holes , the only difference being a change of sign. Since we
cannot be sure of the presence of a white hole, there are histories
over topologically trivial metrics bypassing the singularity. In as
much as the big bang can be assimilated to a white hole ([2]) the
argument applies to it too [itex](*), i[/itex].e. there must be information flowing
our way in time from behind the "initial" singularity.

There are stellar objects that may lend observational relevance to
this remark. The "standard candle" criterion provides strong
evidence for an expanding universe, but its application to, say,
distant supernovae requires a nonnull cosmological constant
([3],[4]).
If one dislikes dark energy, as I do, one may speculate that, unlike
most other objects we see in the sky, distant supernovae reveal
information that did not pour out of the big bang but which reaches us
along paths over topologically trivial metrics, skimping the
singularity.

IV

(*) the point being whether an initial singularity with unitary
amplitude is detemined by running the current state of the universe
backwards in time, i,e. paraphrasing Hawking, wheter we can be sure
the initial singularity forms.

[1] http://pancake.uchicago.edu/%7Ecarro...kingdublin.txt
[2] http://math.ucr.edu/home/baez/physic.../universe.html
notice the remark: "Outside a white hole event horizon there are
world lines which can be traced back into the past indefinitely
without ever meeting the white hole singularity whereas in a FRW
cosmology all worldline originate at the singularity."
[3] http://www.slac.stanford.edu/econf/C...perlmutter.pdf
[4] http://olympus.het.brown.edu/piperma...22/013841.html
__{__________________________}

"Mensionis quaestionem expellas furca, tamen usque recurret"

"You may chase the measurement problem away with a pitchfork, yet in
the end it will come back".

Horace&IV

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