Astrophysicists propose new twist on Big Bang
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Astrophysicists propose new twist on Big Bang
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Re: Astrophysicists propose new twist on Big Bang
#2>The researchers emphasize that this idea, though it may sound absurd, is grounded firmly in the mathematics describing space and time. Specifically they’ve used the tools of holography to “turn the big bang into a cosmic mirage.”
embedding into higher dimension spaces (or in general - into more "richer" structures) is a convenient mathematical tool and it works nice ... in mathematics. To work in physics that higher dimension space must really exist. Otherwsie, for all we know, out Universe can be just a 3d surface of a 4d nut that a small 4d squirrel puppy is about to bite into.
Re: Astrophysicists propose new twist on Big Bang
#3>The researchers emphasize that this idea, though it may sound absurd, is grounded firmly in the mathematics describing space and time. Specifically they’ve used the tools of holography to “turn the big bang into a cosmic mirage.” embedding into higher dimension spaces (or in general - into more "richer" structures) is a convenient mathematical tool and it works nice ... in mathematics. To work in physics that higher…
The next phrase mentions that this theory is testable
>Along the way, their model appears to address long-standing cosmological puzzles, and – crucially – produce testable predictions.
I'm very curious to know how.
Re: Astrophysicists propose new twist on Big Bang
#4>The researchers emphasize that this idea, though it may sound absurd, is grounded firmly in the mathematics describing space and time. Specifically they’ve used the tools of holography to “turn the big bang into a cosmic mirage.” embedding into higher dimension spaces (or in general - into more "richer" structures) is a convenient mathematical tool and it works nice ... in mathematics. To work in physics that higher…
Ignorant question here, but is it not the case that the normal laws of physics don't apply at big bang time?
Do we expect the laws of mathematics to still apply?
Does anyone really have any clue about this stuff?
Re: Astrophysicists propose new twist on Big Bang
#5Original paper title: Out of the White Hole: A Holographic Origin for the Big Bang
Arxive page (w/abstract): http://arxiv.org/abs/1309.1487
Direct link to paper: http://arxiv.org/pdf/1309.1487v2
Re: Astrophysicists propose new twist on Big Bang
#6>The researchers emphasize that this idea, though it may sound absurd, is grounded firmly in the mathematics describing space and time. Specifically they’ve used the tools of holography to “turn the big bang into a cosmic mirage.” embedding into higher dimension spaces (or in general - into more "richer" structures) is a convenient mathematical tool and it works nice ... in mathematics. To work in physics that higher…
Ignorant question here, but is it not the case that the normal laws of physics don't apply at big bang time? Do we expect the laws of mathematics to still apply? Does anyone really have any clue about this stuff?
#BigBangAgnostic
Re: Astrophysicists propose new twist on Big Bang
#7>The researchers emphasize that this idea, though it may sound absurd, is grounded firmly in the mathematics describing space and time. Specifically they’ve used the tools of holography to “turn the big bang into a cosmic mirage.” embedding into higher dimension spaces (or in general - into more "richer" structures) is a convenient mathematical tool and it works nice ... in mathematics. To work in physics that higher…
Ignorant question here, but is it not the case that the normal laws of physics don't apply at big bang time? Do we expect the laws of mathematics to still apply? Does anyone really have any clue about this stuff?
It's always been my understanding that the normal laws of physics don't work at big bang time as well. One thing I've wondered about is how people are so adamantly confident in the theory of the Big Bang in light of this. Is it simply because they don't like the alternatives, because they've never been heard an alternative, or is there a better reason?
Re: Astrophysicists propose new twist on Big Bang
#8Earlier quoted context omitted.
Ignorant question here, but is it not the case that the normal laws of physics don't apply at big bang time? Do we expect the laws of mathematics to still apply? Does anyone really have any clue about this stuff?
It's always been my understanding that the normal laws of physics don't work at big bang time as well. One thing I've wondered about is how people are so adamantly confident in the theory of the Big Bang in light of this. Is it simply because they don't like the alternatives, because they've never been heard an alternative, or is there a better reason?
It's basically a belief system at that stage. It doesn't provide any more believable answers than religion for me.
Re: Astrophysicists propose new twist on Big Bang
#9>The researchers emphasize that this idea, though it may sound absurd, is grounded firmly in the mathematics describing space and time. Specifically they’ve used the tools of holography to “turn the big bang into a cosmic mirage.” embedding into higher dimension spaces (or in general - into more "richer" structures) is a convenient mathematical tool and it works nice ... in mathematics. To work in physics that higher…
The next phrase mentions that this theory is testable >Along the way, their model appears to address long-standing cosmological puzzles, and – crucially – produce testable predictions. I'm very curious to know how.
From the fine paper[1]:
Finally, let us comment on potential testability of this model. As we pointed out, the simple model of cosmological perturbations, developed in Sec. 4 is already ruled out by cosmo- logical observations at > 5σ level, as it does not predict any deviations from scale-invariance. However, it is easy to imagine small corrections that could lead to a ∼ 4% deviation from scale-invariance, especially given that bulk temperature is so close (i.e. ∼ 20% of) the 5D Planck temperature. In the context of our model, the red tilt of the cosmological power spectrum implies that the amplitude of 5D bulk graviton propagator, which enters in Eq. (4.8), is getting stronger in the IR, suggesting gradual unfreezing of additional polarizations of graviton.
Re: Astrophysicists propose new twist on Big Bang
#10>The researchers emphasize that this idea, though it may sound absurd, is grounded firmly in the mathematics describing space and time. Specifically they’ve used the tools of holography to “turn the big bang into a cosmic mirage.” embedding into higher dimension spaces (or in general - into more "richer" structures) is a convenient mathematical tool and it works nice ... in mathematics. To work in physics that higher…
Ignorant question here, but is it not the case that the normal laws of physics don't apply at big bang time? Do we expect the laws of mathematics to still apply? Does anyone really have any clue about this stuff?
Yes, we expect the laws of mathematics to still apply.
The laws of physics also apply, but we don't know all of them. For example Newtonian physical vs. relativity. Both are correct, but one only comes into play at high velocity or energy. Same with the big bang, there may be a more complete description of what happens that only comes into play at high energy.
This doesn't mean the current laws don't apply, but rather they are inaccurate, but we can't tell since the inaccuracy is too small at our energy level.