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Berry's phase of bloch oscillation

  1. Mar 1, 2008 #1
    we know in bloch oscillation, the wavefunction of an electron returns to its initial state after a period, but up to a phase.

    my question is, can this phase be nontrivial?
  2. jcsd
  3. Mar 2, 2008 #2

    I don't think a periodic potential by itself leads to berry phase--berry phase arises when the Hamiltonian depends on parameters which are taken around a closed path in the parameter space.
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