Phases of the electronic two-level model under the rotating wave approximation
We present the time evolution of the electronic two-level model in the rotating wave approximation (RWA). We calculate the Aharonov-Anandan phase of the vector states with cyclic evolution either within the period of an external monochromatic electric field or the period corresponding to Rabi's...
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Sprache: | eng |
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Zusammenfassung: | We present the time evolution of the electronic two-level model in the
rotating wave approximation (RWA). We calculate the Aharonov-Anandan phase of
the vector states with cyclic evolution either within the period of an external
monochromatic electric field or the period corresponding to Rabi's frequency.
The Aharonov-Anandan phase is shown to be dependent on the initial vector
state, unless the system evolves in the adiabatic regime; in the latter case,
the Aharonov-Anandan phase recovers Berry's phase. Our results are also
discussed in the quasi-resonant regime. |
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DOI: | 10.48550/arxiv.1004.4008 |