Dismiss Notice
Join Physics Forums Today!

What is Bose Eintein Condensate?

  1. Mar 11, 2006 #1
    I am doing a project on bose einstien condensate at school. Could someone please explain to me what it is in a easy to undertand way?I don't understand about the doppler shift part.:confused:
  2. jcsd
  3. Mar 12, 2006 #2
    One of the possible clasification of the particles is according to its spins. If its spin is an integer, then we call it a 'boson' and the wavefunction that describes its behavior is symmetric. If its spin is a semi integer, then we call it a 'fermion' and its wavefunction is antisymmetric.

    The first kind of particles doesn't obey Pauli Exclusion Principle (two particles can't be in the same individual quantum state) so them can stand in the same state.

    When we cool a boson system under a characteristic temperature, the more energetic particles begin to 'fall' in the lowest energy state, to minimize its energy. If we continue cooling and cooling the system, then all the system will be in the lowest energy state.

    Then, particles are quiet.

    Condensation has not the same meaning that usual condensation. When we say that vapour condensates, we mean that it reduces its volume, then rises its density and so. In BEC, the particles can remain the same volume, the same density. But in BEC particles are quiet.
  4. Mar 12, 2006 #3
  5. Mar 13, 2006 #4

    Thanks! Now I understand it way :rofl: better.

Have something to add?

Similar Discussions: What is Bose Eintein Condensate?