Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 38: Quanteneffekte (Verschränkung und Dekohärenz)
Q 38.4: Vortrag
Donnerstag, 13. März 2008, 12:00–12:15, 2D
The role of atom-cavity detuning in cavity QED experiments — •Denis Gonta1 and Stephan Fritzsche1,2 — 1Max–Planck–Institut für Kernphysik, Postfach 103980, D–69029 Heidelberg — 2Physikalisches Institut der Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg
Cavity QED provides an excellent control of the atom-field interaction, when Rydberg atoms reside or pass through the cavity. This opens up a way to obtain the coherent coupling of the atomic and photonic qubits as associated with the two-level Rydberg atoms and the cavity field states, respectively.
In this contribution, we explore the coherent evolution of the cavity states superposition in bimodal cavities and how this evolution is affected if a realistic atom-cavity detuning is considered. Comparison of our model computations has been made with experiment [1] in which the entanglement of the two field modes has been demonstrated using a bimodal cavity. A better agreement with experiment is obtained if a ‘finite switch’ of the atomic resonance frequency from one to the second mode of a bimodal cavity is combined with the mutual interaction between the cavity modes. We shall consider also experimental setup [2] in which the entanglement of two Rydberg atoms has been demonstrated by the cavity assisted collision.
[1] A. Rauschenbeutel et al., Phys. Rev. A 64, 050301 (2001).
[2] S. Osnaghi et al., Phys. Rev. Lett. 87, 037902 (2001).