German Scientists Create Bose-Einstein Condensate Using Photons 61
Posted
by
Soulskill
from the keep-this-discovery-away-from-sharks dept.
from the keep-this-discovery-away-from-sharks dept.
xt writes "A team of physicists, led by the University of Bonn's Martin Weitz, have managed to create a Bose-Einstein condensate (here's a more detailed explanation) out of photons, previously thought to be impossible. The research was published in the journal Nature (abstract, and the arXiv has the submitted paper as a PDF) and has possible applications on solar energy technology and shortwave lasers, which would be well-suited to the manufacture of computer chips as the process uses lasers to etch logic circuits onto semiconductor materials. Seems like Moore's law is safe again!"
F1RST P0ST! (Score:1)
How do you like them photons?
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Einstein is responsible for those crappy Bose speakers?
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Click 3 Times (Score:2)
Click your heels 3 times, and say:
There's no laze like Bose!
There's no laze like Bose!
There's no laze like Bose!
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You know whats odd?
If this was previously thought to be impossible - you'd think it would have much larger implications.
Perhaps they should have said previously thought to be improbable?
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physics marketing (Score:4, Funny)
Super Photons, original flavor: Not From Condensate.
Regular Photons: From Condensate.
Spooky Photons: (Note: contains only about 50% of stated volume)
Moore's law is worthless right now... (Score:3, Insightful)
"Seems like Moore's law is safe again!"
That's great, but if memory and I/O speeds don't keep up, the extra FLOPS are becoming more and more worthless....
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True, but FLOPS have not been the bottleneck for a long time. When was the last time you had to up your CPU speed or used all your CPU?
Last night. Then again, I was trying to play a game on netbook, so I had it coming. Really, for a desktop, if I am not getting enough speed I am probably just being cheap and not upgrading, but for a netbook or phone, a faster processor would make a noticeable performance difference. I agree that the other stuff is important too, but CPUs are still a bottleneck for real consumer applications, just not on the desktop.
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Firefox maxes one core out all the time. I could certainly use more flops.
No, you could use a better version of Firefox. There's no reason a browser should max out a current multi-core CPU.
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Point being - under the same conditions [firefox using 1 of 2 cores], a faster cpu will use faster cores and will result in this happening less often.
I do find your re
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You know, there's something called JavaScript.
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Only if you open Slashdot with a long discussion. Really, it's the only page I'm visiting regularly which maxes one core out for an extended time.
Well, at least now it's fast enough that I don't get a browser warning that a script takes too long (there was a time where Slashdot triggered that regularly).
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"Seems like Moore's law is safe again!"
That's great, but if memory and I/O speeds don't keep up, the extra FLOPS are becoming more and more worthless....
Well, THAT'S why it's so important to do things that were previously thought to be impossible.
Once we finally get small scale time travel going we can write memory values before the calculation is actually performed!
Slow I/O? No problem as the information arrives before it is sent... so it's always on time for the super fast processor to make the next calculation and send the result back in time to the slower I/O and memory!
I don't know why but I get this vision of a heat sink that looks like a 12 acre lak
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Our CS department chair made an interesting comment the other day (although I think he was quoting someone else). When it comes to energy consumption in todays processors, computation is almost free. All the energy goes into moving data around.
As for memory... (Score:2)
lithography applications (Score:1)
So this would presumably be used for extreme ultraviolet lithography [wikipedia.org]?
I guess this paragraph from the Wikipedia article may be relevant:
A further characteristic of the plasma-based EUV sources under development is that they are not even partially coherent, unlike the KrF and ArF excimer lasers used for current optical lithography. Further power reduction (energy loss) is expected in converting incoherent sources (emitting in all possible directions at many independent wavelengths) to partially coherent (emit
Idea (Score:2)
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Better yet, if it really works at room temperature, this method will still be workable once we've squandered the world's supply of helium. (Thanks for a "free market" solution, Congress.)
How much other basic science is going to shortly become impossible - basically prohibitively expensive when we hit the end of "Cheap Helium"?
Makes you wonder what fraction of helium is in the parade floats, and if they attempt to scavenge any of it.
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> Thanks for a "free market" solution, Congress.
There's nothing "free market" about depressing the price by an order of magnitude or so by dumping stockpiles.
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That was kind of my point, but I'll bet at the time it was heralded as a "market-oriented bipartisan solution." At the time, it rather slipped under my radar screen - I didn't hear about the mess until about 6 months ago.
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As the photon BEC works at room temperature and seems quite simple, [...] can't it simply be miniaturized and used as a replacement of circuitry instead of used for lithography?
Define simple.
You do realise how good the technology you want to replace really has become?
MOSFET's are reliable switches that are really, really small.
They are so small, modern transistors are composed of a number of atoms that
humans can actually imagine.
There are few other technological items that are that small, and yet fullfil a
task with incredible reliability over a long period of time as an individual device.
I actually don't know of any right now.
If you can't miniaturize these cavities to sub micromet
The sales pitch is unnecessary (Score:4, Insightful)
The research is a fascinating work about fundamental physics. This is one case where a sales pitch about about possible, only tangentially related applications in computing is quite unnecessary.
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What exactly is this? (Score:2)
Who Cares? Weaponize It! (Score:2)
Photons bouncing around inside the resonant cavity could be considered a standing wave, but the BEC requires them to reach a minimum critical density in order to achieve the BEC state. Meanwhile lasers formed by traditional population inversion can happen at any amplitude.
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It's a pretty dense article but, as far as I can tell, they're considering the motion of the photons in the plane transverse to the cavity axis as the particle movement. The problem is then two-dimensional in nature with the curvature of the mirrors directing photons back towards the cavity center. The situation is then analogous to a two-dimensional gas of particles confined by a central trapping potential.
In essence, the temperature is related to the transverse velocity of the intra-cavity photons. I beli
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Wait - the Germans have access to Science again? (Score:2, Funny)
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No! They're Our Friends Now! (Score:2)
Once all the Germans were warlike, and mean
But that couldn't happen again!
We taught them a lesson in 1918
And they've hardly bothered us since then!
Wait - the morons have access to Slashdot again? (Score:1, Insightful)
In Between (Score:2)
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no. you either get dumbed down, or you get equations.
shit's complicated. deal with it or deal with not understanding it.
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The first link [wikipedia.org] reads like an elementary school primer, while the second link [wikipedia.org] reads like a PHD dissertation. Is it not possible to explain quantum mechanics at a normal adult level?
Lemme try:
Quantum mechanics tells us that there are only discrete energy levels allowed within any physical system. For example, if you put a single particle into a box, the allowed energy levels a given by plane (matter) waves. Now, you don't have only a single particle, but say a million of them. Since they are the same atoms, they are indistinguishable. So, you cannot say that atom A is in level X and atom B is in level Y, but only that 2 atoms are in level X and 5 atoms are in level Y and so on. Since w
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Any elementary particle, atom, or molecule, can be classified as one of two types: a boson or a fermion. For example, an electron is a Fermion, while a photon or a helium atom is a Boson.
Fermions can be elementary, like the electron, or composite, like the proton. All observed fermions have half-integer spin. An important characteristic of a Fermion is that it obeys the Pauli exclusion principle. Thus, if more than one fermion occupies the same place in space, the properties of each fermi
The New Monster? (Score:3, Funny)
No, the cat does not, in fact, "got my tongue." (Score:1)
Neither the linked wiki to the layman's explanation, nor the "detailed" one explain it the way I think I understand it.
As you cannot know momentum and position simultaneously with great accuracy (I think it's those two anyway), when you cool these down to near absolute zero, you know their momentum very accurately, which is almost zero. Hence their positional accuracy skyrockets into fuzziness.
Can someone please clean this up for me so I can understand it better?
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Heisenberg's Uncertainty principle : For a particle, the mutiplication of a change in momentum (x) and position(y) is a constant. (roughly speaking).
Which means that if x is close to zero, and there is only infinitessimaly small change in x, the change in y (position) is infinitesimally large, which means you have no freakin idea where it is at any given moment of time.
thats the best I can do
Implications... (Score:2)
Tell me this won't lead to sentences like "Excuse me, but could I please borrow a cup of red light???"
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Not so funny (Score:2)