 93174 Joye A., Pfister ChEd.
 NonAbelian Geometrical Effect in Quantum Adiabatic Transitions
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Jun 10, 93

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Abstract. We establish a new formula for the probability of a quantum
adiabatic transition between two
permanently degenerated energylevels which do not cross. This formula
corresponds to the nonabelian generalization of the LandauDykhne formula
valid for the nondegenerate case. It applies in particular in cases of
symmetry induced degeneracy, a typical example being the Kramer's
degeneracy.
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