On Mon, Jul 1, 2013 at 3:10 PM, meekerdb <[email protected]> wrote:
> On 7/1/2013 7:20 AM, Jason Resch wrote: > > > > > On Mon, Jul 1, 2013 at 12:40 AM, meekerdb <[email protected]> wrote: > >> On 6/30/2013 8:09 PM, Jason Resch wrote: >> >> >> >> >> On Sun, Jun 30, 2013 at 2:00 AM, meekerdb <[email protected]> wrote: >> >>> On 6/29/2013 6:34 AM, [email protected] wrote: >>> >>> With regard to your's and Brents' coments, how would we demonstarte >>> string theory? A super-giant CERN hadron collider? >>> >>> >>> No. You don't demonstrate physics models, you makes some predictions >>> and if they are turn out to be true the you give some credence to the >>> theory. String theory has the same problem as Bruno's theory, it >>> apparently predicts far too much. >>> >> >> >> Too much according to which standard? In my opinion, present >> "monouniverse" theories predict far too little in my as we are founded by >> mysteries like the cosmological constant having to be tuned to 120 decimal >> places. >> >> >> Yes, such "everything" theories provide cheap explanation, but no >> prediction. >> > > But what is the basis for the assumption that it's possible to derive a > unique set of physical laws mathematics alone? > > > It's not an assumption, it's a working assumption by those who want to > work on the problem instead of resting on the anthropic principle. > I'm not saying physicists should pack their bags and go home, only that they should remain open to the possibility that some things, such as a unique value for the fine structure constant, may not be explainable from within the theory itself. > So far they've been vindicated. > > Physicists can dismiss the anthropic principle when they can show the values for the dimensionless constants can be derived by some more fundamental (non-anthropic) principle(s). > > > "The Anthropic Principle is essential, if one is to pick out a solution to > represent the universe, from the whole zoo of solutions allowed by M > theory." -- Stephen Hawking > > > That makes no sense to me. If you assume all the solutions are realized > you don't need to "pick out one". If you assume only this one has been > realized then saying it was picked out by the anthropic principle implies a > mystic teology. > > The way I read it is as a criticism of the hope that the mathematics of string theory will eventually show that all possibilities (except for one, the one corresponding to our universe) are ruled out. > > > > >> In fact the holographic principle indicates the CC need not be "fine >> tuned" at all. >> > > Interesting. Can you point me toward papers on this subject? > > > Here's one http://arxiv.org/pdf/1305.3918v1.pdf But it's an idea that's > been floating around for a while. The prediction of the CC that is off by > 120 orders of magnitude is based on quantum field theory and the zero-point > energy of the vacuum. It's assumed that each small (Planck) volume has one > degree of freedom for each field mode. If you change that to one degree of > freedom for each small (Planck) *area* on the Hubble sphere you get a > number that is on the order of that observed, 10^-5Gev/cm3. > > Thanks. Jason > Brent > > > Jason > > > -- > 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 post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/everything-list. > For more options, visit https://groups.google.com/groups/opt_out. > > > > No virus found in this message. > > Checked by AVG - www.avg.com > Version: 2013.0.3345 / Virus Database: 3204/6452 - Release Date: 06/30/13 > > > -- > 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 post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/everything-list. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- 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 post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/groups/opt_out.
