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Article
Quantum-classical correspondence of the Dirac equation with a scalar-like potential
Quantum matrix elements of the coordinate, momentum and the velocity operator for a spin-1/2 particle moving in a scalar-like potential are calculated. In the large quantum number limit, these matrix elements ...
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Article
Berry phases in the three-level atoms driven by quantized light fields
A theoretical analysis of Berry’s phases is given for the three-level atoms interacting with external one-mode and two-mode quantized light fields. Three main results are obtained: (i) There is a Berry phase w...