When a particle with charge q traverses a loop that encloses a magnetic flux Φ, it picks up a phase eiqΦ (I have set c and ℏ=1). This is the usual Aharonov-Bohm phase. Now, let us look at a different scenario - consider a particle with a magnetic dipole moment that gives rise to a flux Φ through a plane. Move this particle along a loop enclosing a charge q in the same plane. What is the phase picked up in this case?
According to Section 2.1.3 of Intro. to Topological Quantum Computation by Pachos, this phase is also eiqΦ. I am not able to see why, though.
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