Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik

Q 15.77: Poster

Montag, 14. März 2011, 16:30–19:30, P1

Robustness of trapping states in microwave cavity QED. — •Christian Arenz and Giovanna Morigi — Theoretische Physik, Universität des Saarlandes

Trapping states are fixed points of the dynamics of the mode of a high-Q resonator coupled with a beam of atoms [2, 3]. Such states are found in the strong coupling regime and for well defined interaction times. In [1] it was shown that, when the atoms are prepared in a coherent superposition of ground and excited state, the corresponding trapping state can be a "Schrödinger-cat" state of the cavity field, provided that the atomic velocity is appropriately selected.
We study both analytically and numerically the stability of trapping states for different initial states of the driving atoms, as a function of the velocity distribution of the atoms, of their arrival rate, and of the photon storage time in the cavity field. Furthermore we determine the fidelity of preparing these states for experimentally accessible parameters [2, 3].

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