White dwarf quantum tunnelling

  • #1

Main Question or Discussion Point

I just finished watching the video "The Last Light Before Eternal Darkness – White Dwarfs & Black Dwarfs"
At 5:17 he mentioned quantum tunneling will take up a timespan so long that calling it forever is ok.

But nothing takes forever,so,how long will it actually take?


ps:I later realized that this will be an extremely tricky problem to answer so just to make things clear, I am not in a rush of any kind :)
 
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Answers and Replies

  • #2
Update: White dwarf's volume ≈ 1.08321 x 1027cm3

Process:It is said that white dwarfs has approximately the volume as earth.
Wikipedia shows that earth's volume is 1.08321 x 1012km3, which equals to 1.08321 x 1027cm3

Reason: I want to reduce this entire problem to "how many atoms/particles needs to experience quantum tunnelling".
 
  • #3
PeterDonis
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John Baez discusses this (along with a lot of other things that could happen in the really, really far future) here:

http://math.ucr.edu/home/baez/end.html
In the article, he says that it will take roughly 101500years for it to occur, how does he calculate/assume that?
 
  • #5
PeterDonis
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how does he calculate/assume that?
I'm not sure of the details of the calculation; it's possible that they are in one of the references he gives at the end of the article.
 

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