recall however that the distinction between space and time is coordinate-dependent.
that is, you can always pick a time coordinate that does not ``expand'' (with respect to your `proper time'), or you can use conformal coordinates where both space and time components of the metric ``expand''...
You know that's not a dumb question..
Anyway, the relation E= hck is only true after an amount of time h/E (due to the Heisenberg uncertainty relation, DE DT > h), and so that's the amount of time it takes to reach c
Thanks for that Marcus!
Unfortunately, I won't have time to delve deeper into this in the next few days.
I've certainly learned a lot from our conversation,
Wakabaloola
yes, that's an interesting paper .. you should have been at the Brussels conference a few weeks ago, where all three, namely Hartle, Hawking, Hertog, and also Strominger, Susskind, ..., among others were present:
http://www.solvayinstitutes.be/events/cosmology2012/cosmology.html
Hartle...
... 't Hooft might be onto something here ... and I don't necessarily mean in our fundamental understanding of string theory (although I don't rule this out), but I'm rather referring to the striking door this statement seems to open: the prospect of putting the quantum superstring onto a...
I see. This is very interesting, but it is also puzzling at the same time. If LQG is a quantum theory of gravity, which thus far has not incorporated matter, but nevertheless requires matter in order for one to access and measure its observables, then in what sense can we address physical...
Hi All,
To zoom in, or to zoom out .. that is the question:
http://htwins.net/scale2/
Isn't it amazing ..
that we're arrogant enough to claim that it all probably comes from a single equation?
Wow!
Wakabaloola :)
Wow, so you are saying that SUSY is not compatible with SSB, and that one needs to break SUSY in order to incorporate it, that's remarkable! Is this specific to MSSM?
This doesn't sound very natural ..
I see! So does this mean that these soft terms actually do break the symmetry of the...
Great, thank you very much for the reference. In the meanwhile I cannot resist following on from your response to ask the following questions.
Lets say an observer wants to measure one of these observables. How does he/she proceed? Does it make sense to compute a scattering cross-section, or a...
Hi All,
I've been watching the Weinberg youtube video:
and I have two questions.
1) He says at some point that although there is a symmetry which wants the standard model particles to be massless (and which is then spontaneously broken by the Higgs mechanism), this symmetry does not...
.. I don't think you have to worry about the range of t_0. All this means is that the total area will be less or equal to that of the ellipse, it doesn't change the equations.
Wakabaloola