Tuesday, January 5, 2016

quantum mechanics - Aharonov-Bohm phase picked up when a magnetic dipole goes around a charge


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 =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.




No comments:

Post a Comment

classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...