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I Goldstone bosons in description of superfluidity

  1. Feb 11, 2017 #1
    Hello,

    I'm trying to understand how the superfluidity is connected with the Lagrangian of the system: in some textbooks (e.g. Antony Zee qft in nutshell) it is stated, that in case, when the excitations in the fluid have energy spectrum linear with momentum , there is a critical velocity, which forbids appearing of these excitation cinematically , and what is not clear, is that beside massless particles with linear energy spectrum there are also kind of "higgs bosons", which appear because of spontaneous symmetry breaking , which are massive so that they can appear at any velocity . How one can show, that the excitation in superfluid are goldstone bosons only?

    thanks
     
  2. jcsd
  3. Feb 18, 2017 #2
    Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
     
  4. Feb 19, 2017 #3

    MathematicalPhysicist

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    Try reading Kardar's or Huang's, perhaps it also appears in Pathria's, not sure.

    You should be digging through the literature.
    :-)
     
  5. Feb 20, 2017 #4

    DrDu

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    What symmetry gets broken in the transition to BEC?
     
  6. Feb 20, 2017 #5

    DrDu

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