Two-photon interaction between trapped ions and cavity fields

Details Two-photon interaction between trapped ions and cavity fields Two-photon interaction between trapped ions and cavity fields

2006-08-24

arxiv.org/abs/quant-ph/0608193v1

Eur. Phys. J. D 41, 417 (2007)

Physics

Quantum Physics

9 pages, 10 figures

Scientific paper

10.1140/epjd/e2006-00243-7

In this paper, we generalize the ordinary two-photon Jaynes-Cummings model (TPJCM) by considering the atom (or ion) to be trapped in a simple harmonic well. A typical setup would be an optical cavity containing a single ion in a Paul trap. Due to the inclusion of atomic vibrational motion, the atom-field coupling becomes highly nonlinear what brings out quite different behaviors for the system dynamics when compared to the ordinary TPJCM. In particular, we derive an effective two-photon Hamiltonian with dependence on the number operator of the ion's center-of-mass motion. This dependence occurs both in the cavity induced Stark-shifs and in the ion-field coupling, and its role in the dynamics is illustrated by showing the time evolution of the probability of occupation of the electronic levels for simple initial preparations of the state of the system.

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