Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 54: Poster 3
Q 54.64: Poster
Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II
Semi-classical correlation functions in cavity QED — •James Alves de Souza1, 2, Haytham Chibani1, Markus Koch1, Christian Sames1, Tatjana Wilk1, Celso Jorge Villas-Boas2, and Gerhard Rempe1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany — 2Departamento de Fisica, Universidade Federal de São Carlos, Via Washington Luis km 235, São Carlos, SP 13565-905, Brazil
In a recent experiment, we have studied the quantum dynamics of a strongly coupled atom-cavity system by evaluating time-dependent second- and third-order correlation functions of the photons emitted from the cavity [1]. A new coherent dynamical process named super Rabi oscillation has been observed, which reflects the coherent exchange of energy between the driving laser and the atom-cavity system. For low driving strengths, it is well explained by the Rabi oscillations between the ground state and the first excited dressed states of the system. For higher driving, systematic deviations from this two-level model are found due to the population of higher excited dressed states. Here, we address the question if this deviation can also be explained by semi-classical models of light-matter interaction. To this end, we introduce the idea of semi-classical trajectories. Similarly to a quantum trajectory the semi-classical evolution of the system is interrupted by sudden quantum jumps when a photon is spontaneously emitted by the atom. This enables us to investigate the effect of the atomic emissions on a classical field. [1] M. Koch et al, Phys. Rev. Lett. 107, 023601 (2011).