Non-Abelian Geometric Phase, Floquet Theory, and Periodic Dynamical Invariants

Details Non-Abelian Geometric Phase, Floquet Theory, and Periodic Dynamical Invariants Non-Abelian Geometric Phase, Floquet Theory, and Periodic Dynamical Invariants

1998-10-22

arxiv.org/abs/quant-ph/9810064v1

J.Phys.A31:9975-9982,1998

Physics

Quantum Physics

Plain LaTeX, 13 pages, accepted for publication in J. Phys. A: Math. Gen

Scientific paper

10.1088/0305-4470/31/49/015

For a periodic Hamiltonian, periodic dynamical invariants may be used to obtain non-degenerate cyclic states. This observation is generalized to the degenerate cyclic states, and the relation between the periodic dynamical invariants and the Floquet decompositions of the time-evolution operator is elucidated. In particular, a necessary condition for the occurrence of cyclic non-adiabatic non-Abelian geometrical phase is derived. Degenerate cyclic states are obtained for a magnetic dipole interacting with a precessing magnetic field.

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