Bose-einstein Definition and 79 Threads

Lately I've been wondering how magnetic traps work. So can anyone tell me how they work, How long they can hold atoms and if they can achieave Bose-Einstein Condensate? Also I have been wondering if they could hold several grams of atoms and then create the Bose-Einstein Effect. Can anyone...

I notice that some bosons can exhibit Bose-Einstein condensation while others cannot (photons, phonons). Is it true that the bosons can have BEC only when the total number of particles is conserved? In this case, the chemical potential approaches zero at T_c, and particles begin to cluster...

A quick question. I just heard very little about this in a lecture today, so I have a few questions. If I remember correctly my teacher said that when you hit a specific temperature, very low, the atoms in the gascloud, you are trying to cool, will be in the exact same quantum state. So does...

Does the inertia of either a Bose-Einstein or Fermi-Dirac condensate increase linearly with the number of particles?

Please teach me whether it is possible there are any distributions different from Fermi-Dirac and Bose-Einstein distributions.Because the Statistic Theorem only demontrates that integer spin particles can't obey Fermi-Dirac distribution and spin-haft particles can't obey Bose-Einstein distribution.

Im just a 11th grader so pardon me if i sound stupid. I had read in an article that bose-einstein condensates can slow down light to mere human speeds. Is this really possible?if so, what's the theory behind this? Can the same be achieved by fermionic condensates?

The title sort of tells it. My question is, how is it that a Bose-Einstein condensate compresses and slows down the passage of light through it while keeping the light's quantum "information" such that the bean of light will exit the condensate and return to its normal coherency? I know that the...

To reiterate the question, can the method of cooling an object down with the Bose-Einstein Condensate reach absolute Zero? I believe it cannot because the method itself might be close, but never achieve because i believe that absolute zero can only happen naturally, if it can happen at all...

Homework Statement Find Condensation Temperature of ideal Bose gas with internal degrees of freedom. Assume only ground and first excited state of internal spectrum need to be taken into account. Homework Equations The Attempt at a Solution I know j(T) for internal degrees of...

Suppose that M molecules are distributed among two urns; and at each time point one of the molecules it chosen at random, removed from its urn, and placed in the other one. So this is a time-reversible Markov process right? So P_{i,i+1} = \frac{M-i}{M} . What do the limiting probabilities...

I'm wondering -- would you get the phenom. of Bose-Einstein condensation in a 2D system. My intuition is "no", but I'm having a hard time saying why. I suppose I could try and work it out mathematically (no time, right now) -- perhaps someone has? -- but a physical explanation would be nice too...

What are some possibilies of Bose-Einstein condensation in say a 1D gas? Or a 2D gas?

Is it possible to have Bose-Einstein condensation in two dimensions? Why?

If we have indistinguishable particles, we must use Fermi-Dirac statistics. To Identical and indistinguishable particles, we use Bose-Einstein statistics. And, to distinguishable classical particles we use Maxwell-Boltzmann statistics. I have a system of identical but distinguishable...

I've been curious as to why Bose-Einstein statistics are always derived using the grand canonical partition function. Yes, I know it is easier, but there must also be an expression for the canonical ensemble. However, I was suprised that I have been unable to find it in the standard sources -...

hey guys i see that it is a new modern subject we never talked about it ... what do u think ? i have to represent a project about it in 3 weeks and it is a big subject and so important ... let's discess it

Homework Statement (a) Find the average energy per photon for photons in thermal equilibrium with a cavity at temperature T. (b) Calculate the average photon energy in electron volts at T = 6000K.Homework Equations u(E)dE = \frac{8 \pi}{(hc)^3} \frac{E^3 dE}{e^{E/k_B T} - 1}The Attempt at a...

Is the new rock star physics, where do I sign up? Seriously though, what kind of background does working with Bose-Einstein condensates require? I'm taking the 2 standard 300 levels: mechanics and e&m, and math421: applied analysis this semester for physics degree classes. Here are some...

Is it possible to make a Bose-Einstein (or Fermi-Dirac) condensate out of alpha particles alone? In other words, is the effective size of a nucleus, like that of a neutral atom, substantially affected by supercool temperatures?

Hi all, Does anybody know some reference (even internet one) that explains in detail the derivation of Maxwell´s velocity and/or energy distribution on an ensemble of atoms/molecules ? References to Fermi-Dirac distributions and Bose-Eisntein´s are also welcome. Best Regards, DaTario...

Can we have a photon BE condensate? Theoretically, can graviton and gluons and all other force propagators make BE condensates?

how does light slow down considerably when it passes through one? i have always been told that lights speed remains constant. as with many questions, i have my own personaol theories for answers, but i want to find out for sure.

Bose-Einstein Condensates. What is a "matter wave"? Greetings. I was reading a rather non-descriptive page about Bose-Einstein Condensates. I've never really read much about them before, but now I find myself interested. This page mentioned that BECs form "matter waves" about a millimetre...

Do I understand correctly that a Bose Einstein Condensate ejects electromagnetic field lines when forming, and continues to be anti-magnetic (repelled from both poles of the magnet?) after forming, and does this mean that a BEC formed in free space and then brought near an electromagnetic planet...

How is superfluidity studied in a BEC?

I grasp the idea. The only thing I don't get, is why do the atoms have to be frozen? How does the lack of heat effect the state of which the atoms are in? And once the state of superfluidity is achieved, why must the liquid not have a viscosity? Paden Roder wanderingand asking aimlessly to...

Chi Meson offline Joined: Aug 2003 Location: Posts: 40 [1.08 /day] Member #: 1431 This might be jumping the topic, but...Other areas: The proof of Bose-Einstein condensate. Old theory, but refined physics? Isn't this "evolution"?... how is bose einstein condensation explained...

A web page with some real information. http://cua.mit.edu/ketterle_group/Research_topics/Popular_papers.htm#Enc_BEC

Found this nifty intro the the subject. Justplug Bose-Einstein Condensates into a seaarch engine for lots more. http://www.colorado.edu/physics/2000/bec