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I said incomplete: gravity is the obvious missing bit.

Which means that worrying too much about QM's implications outside its realm of application is a bit silly.

by Colman (colman at eurotrib.com) on Thu Jan 3rd, 2008 at 07:40:05 AM EST
[ Parent ]
But Qm is not supposed to address gravity. why is it incomplete then? newton laws are nto supposed to address electromechanics.. is Newton law incomplete for that? and what about Einstein's gravitation.. I guess you think it is incomplete because it does not address all the other forces?

So tell me if I am right.. you think that until there is no theory which links the four fundamental forces foces ..then all theories is incomplete?

then we really have a completely different vision of science :)

A pleasure

I therefore claim to show, not how men think in myths, but how myths operate in men's minds without their being aware of the fact. Levi-Strauss, Claude

by kcurie on Thu Jan 3rd, 2008 at 07:43:24 AM EST
[ Parent ]
It's fine within its own limits. It's when people want to start applying it outside those limits as if it means something that I get annoyed.
by Colman (colman at eurotrib.com) on Thu Jan 3rd, 2008 at 07:51:32 AM EST
[ Parent ]
kcurie:
But Qm is not supposed to address gravity. why is it incomplete then?
Okay: quantum mechanics presupposes the existence of Newtonian time.

Quantum field theory pressupposes the existence of Einsteinian spacetime. You can get away with quantum field theory on stationary spacetimes because there you have a proxy for "Newtonian time". String theory is not very different in the way it appears to require a highly symmetric "background".

But things like Hawking radiation are like the "old" quantum mechanics of Bohr and Sommerfeld. There needs to be a better theory. One in which somehow spacetime emerges.

We have met the enemy, and he is us — Pogo

by Migeru (migeru at eurotrib dot com) on Thu Jan 3rd, 2008 at 08:17:08 AM EST
[ Parent ]

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