Bose-Einstein Condensate

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Offline mrbigg

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Bose-Einstein Condensate
« on: 08/03/2007 20:18:40 »
I don't know if there is enough knowledge acquired yet about Bose-Einstein condensates to answer my question, but here it goes....

From what I have read about the subject, I understand that the atoms in such a condensate appear to occupy the same space.

If this is so, is there a limit to the number of atoms that can occupy that same space?
How would this affect the actual matter density of the element in question?


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another_someone

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Bose-Einstein Condensate
« Reply #1 on: 09/03/2007 07:36:45 »
My understanding of this, and others may correct me if I am wrong, is:

a) there is no theoretical limit that is known as to how many atoms (or other bosons) may condense into a Bose-Einstein condensate.

b) that they occupy the same space is not the same as saying they occupy the space that would be otherwise occupied by a single atom - on the contrary, my understanding is that each atom (or other bosons that is condensed - it does not only apply to atoms) will spread out to occupy the space also occupied by the other bosons, so there is no increase in density, only a smearing of the boundaries between one boson and its neighbours.

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Offline syhprum

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Bose-Einstein Condensate
« Reply #2 on: 09/03/2007 16:49:06 »
Neutron stars can be considered as similar to a Bose-Einstein condensate where the density reaches about 10^14 grams/cm^3 before they collapse into a singularity
syhprum

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Offline Mjhavok

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Bose-Einstein Condensate
« Reply #3 on: 20/03/2007 02:26:00 »
Neutron stars are cool.
Steven
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another_someone

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Bose-Einstein Condensate
« Reply #4 on: 20/03/2007 04:44:10 »
Neutron stars are cool.

Not if you happen to be standing on one at the time [:)]

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Offline Mjhavok

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Bose-Einstein Condensate
« Reply #5 on: 20/03/2007 15:21:14 »
True.
Steven
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Offline DoctorBeaver

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Bose-Einstein Condensate
« Reply #6 on: 21/03/2007 09:09:07 »
Neutron stars are cool.

Not if you happen to be standing on one at the time [:)]

I literally laughed out loud at that reply!  [:D]
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Offline daveshorts

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Bose-Einstein Condensate
« Reply #7 on: 22/03/2007 23:01:12 »
Neutron stars are cool.
They are actually immensely hot between 500 000C and 1000 000 000C... ;)

They are quite small so don't have much area to loose heat over, and made in supernovae.