"You won't get it!"
Posted on 06/03/2016 5:48:55 PM PDT by MtnClimber
ARE black holes bald or hairy? On that strange and esoteric question may hang the future of the universe’s past. The present, the past and the future are all connected by physical laws, a phenomenon called “causal determinism”. With complete information about a system’s present, it ought therefore be possible to determine all its past and future states. In theory, that applies to any system, up to and including the entire universe.
In 1976, however, an up-and-coming Cambridge-based cosmologist called Stephen Hawking challenged this idea by showing that black holes (which are part of the universe, albeit a rather odd part) should evaporate over the course of time, and eventually vanish. That would cause information about anything they had swallowed (and thus a part of the universe’s past) to be lost, meaning the future could not be determined, even in principle. The naive might think this information loss had happened already, as a consequence of the swallowing. But even though it is inside the hole the information continues to exist for as long as the hole does. Causal determinism is not violated.
A black hole’s disappearance, though, really would mean the information’s loss. This, in turn, would mean the end of causal determinism—and with it the assumptions which underpin the whole of modern physics. Fortunately, 40 years on from his pushy original paper, the now-venerable Dr Hawking thinks he has found a way to permit black holes to evaporate while preserving causal determinism.
(Excerpt) Read more at economist.com ...
Interesting article
I can understand the interest, after all it seems a better bet than getting truth from Obama or Hillary.
"You won't get it!"
"You won't get it!"
Dammit....Four seconds!
We could, along with the entire universe be part of a blood cell in God's kneecap. We didn't know he plays soccer on weekends but so far all the existence of time that we know of happened on a Monday June 3rd.
Can I buy some pot from you?
Salad and imagination go well together I've always thought.
We’ve tried for eight years to get information about the black hole in the White House.
Most of the ones I’ve seen are, Wait! What?
Universe or Multiverse? New String Theory Parallel Universes & Timelines...
https://www.youtube.com/watch?v=8lRBWvBPQRw
Consider the value of pi written out in decimal. Now consider where there is the digit 5 in it. What position does the 5 have? It could be the 5th digit. Or it could be the 9th, or an infinite number of other positions. If we instead consider a sequence of digits its the same way. Thus if we have only the information of the present point in the sequence of pi, even though we can calculate the sequence as far as we like, we can't know where we are in the sequence without first being told how far we are in the sequence. No single part of the sequence that does not include its beginning will let you determine the rest of it.
Pi is an abstraction. It may not be that the physical universe is deterministic even in the forward direction. Quantumn states seem to present ambiguity on what will happen. But supposing it was as perfectly predictable as the sequence of pi...there is still no reason to suspect given complete knowledge of how it worked and complete knowledge of the present, without knowledge of the starting state and an idea of how far into the process we are I can't see how we could determine the past.
If you want information about black holes, you certainly won’t get accurate information from quacks such as Hawking.
The gravity is so intense that even information can’t escape its epicenter.
” Dr Hawking thinks he has found a way to permit black holes to evaporate while preserving causal determinism.”
Always make a complete ‘back-up’ of your data.
“-———while preserving causal determinism.”
Well that God for that.
I worry about the preservation of my causal determinism daily.
.
Stephen Hawking’s Hair Club for black holes?
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