Rabi cycle

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The effect is important in quantum optics, nuclear magnetic resonance and quantum computing. The term is named in honor of Isidor Isaac Rabi.


This mechanism is fundamental to quantum optics. It can be modeled using the Jaynes-Cummings model and the Bloch vector formalism.

For example, for a two-state atom (an atom in which an electron can either be in the excited or ground state) in an electromagnetic field with frequency tuned to the excitation energy, the probability of finding the atom in the excited state is found from the Bloch equations to be:

 |c_b(t)|^2 \propto \sin^2 (\omega t/2)

where  \omega is the Rabi frequency.


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extended version of the applet. Includes electron phonon interaction.