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How to measure berry phase?

  1. Aug 27, 2010 #1
    i have no idea of how to measure a berry phase

    take a 1/2 spin in an external magnetic field

    it is well known that this system can exhibit berry phase if the external magnetic field B takes a loop on the sphere.

    but how to measure the berry phase?

    how to separate the berry phase from the dynamical phase?

    anyone have any idea?
  2. jcsd
  3. Aug 28, 2010 #2
    I'm looking at D. J. Griffiths' intro to QM. I regards to Berry's phase he says one could split a particle beam into two, have one part go through an adiabatically changing potential, and recombine the beams and measure the new wave function (definitely open-ended).

    According to the Feynman lectures, you could do a double slit interference experiment with a current-carrying solenoid between the slits and screen. The solenoid will cause a phase difference in the particles, causing the interference pattern to shift on the screen.

    Check out the Feynman Lectures Vol II 15-12. I'm not a great experimentalist, so the details are up to you.
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