4 ms·
Bose–Einstein Condensate
- KingFelix 7y agoBECs are interesting. Currently working on getting a project funded, lots of interesting answers may come from it. Anyone working with BECs?
- dannylandau 7y agoCan you provide some details? I'm in Boulder Colorado where Cornell Wieman created the first condensate and won a nifty prize for it.
- tobmlt 7y agoGreetings from the Denver tech center! Condensed matter is awesome. I wish I was more than a fan/self study neophyte. Good luck to you!
- rubidium 7y agoMy PhD work was in experiential BEC studies. What are you interested in?
- KingFelix 7y agogravitational wave detection
- Ma8ee 7y agoI did my PhD about ultracold matter.
- KingFelix 7y agogravitational wave detection? Have you looked at anything in that realm?
- eindiran 7y agoAt the beginning of the article, it mentions the phrase "the 5th state of matter", which I've heard before; personally, I find it quite misleading. Even if you exclude all of the intermediary states and all of the non-classical states (things like glasses and liquid crystals), there are a lot of exotic states of matter. The Wikipedia page for "States of matter" includes a lot of them[0]. Though perhaps the idea is that there is something fundamental enough about the Bode-Einstein condensate that it should count as the fifth fundamental state of matter? On an unrelated note, its interesting to see the Riemann zeta function turn up here. Does anyone know why it cropped up here, in the critical temperature equation? The page on Bose-Einstein statistics[1] doesn't seem to include it at all. [0] https://en.wikipedia.org/wiki/State_of_matter https://en.wikipedia.org/wiki/State_of_matter [1] https://en.wikipedia.org/wiki/Bose%E2%80%93Einstein_statistics https://en.wikipedia.org/wiki/Bose%E2%80%93Einstein_statisti... EDIT: This paper seems to provide some insight into the latter question - https://arxiv.org/abs/1101.3116 https://arxiv.org/abs/1101.3116
- jpmattia 7y ago> The page on Bose-Einstein statistics[1] doesn't seem to include it at all. Unless I'm mistaken, it [e: meaning the page on condensates] does: Look at the "Derivation" section, and you'll see that g_3/2(f) is eventually manipulated into zeta. [Or maybe I'm misunderstanding your comment.]
- eindiran 7y agoI see that on the page for "Bose-Einstein condensate", in the section "Derivation". I don't see it in the "Derivation" section on the "Bose-Einstein statistics" page, which is where I was hoping to see an explanation (of what it means that it showed up here). But this page has some of the desired info: https://en.wikipedia.org/wiki/Polylogarithm#Integral_representations https://en.wikipedia.org/wiki/Polylogarithm#Integral_represe... "For ''z'' = 1 the polylogarithm reduces to the Riemann zeta function: \operatorname{Li}_s(1) = \zeta(s) \qquad (\operatorname{Re}(s)>1)" And "The polylogarithm can be expressed in term of the integral of the Bose-Einstein distribution: \operatorname{Li}_{s}(z) = {1 \over \Gamma(s)} \int_0^\infty {t^{s-1} \over e^t/z-1} \,dt"
- galaxyLogic 7y agoJust don't let it loose
- chmaynard 7y agoA related blog post by Dr. John Baez: https://johncarlosbaez.wordpress.com/2020/01/31/superfluid-quasicrystals/ https://johncarlosbaez.wordpress.com/2020/01/31/superfluid-q...
- michwill 7y agoWhat I really look forward with BECs (although simple atomic interferometers based on ultracold atoms would do, too) is super-sensitive magnetic field detection. One can detect magnetic fields from a shielded laptop, even many meters away, and figure out what's happening inside (e.g. leaking secrets etc). I think, not a terribly difficult experiment, but nobody has performed it: need ultracool physicists and hackers in one lab room
- codeulike 7y agoRoger Penrose, in Shadows of the Mind, reckoned Bose-Einstein condensates in the microtubules of neurons might be the engine of consciousness. Apart from the weird quantum stuff, another interesting part of that perspective is that neurons are made up of countless microtubules and it might be the microtubules that are the basic computation unit of the brain. So then you can think of each neuron as a processor in its own right, and the computational complexity of the brain might be an order of magnitude higher than commonly supposed.
- The_mboga_real 7y agoCold gas, on wikipedia.. What's the fuss?