Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 21: Poster I
Q 21.52: Poster
Dienstag, 9. März 2010, 16:00–19:00, Lichthof
Spin dynamics of one and two atoms strongly coupled to an optical resonator — •René Reimann1, Wolfgang Alt1, Martin Eckstein1, Tobias Kampschulte1, Mkrtych Khudaverdyan1, Lingbo Kong1, Sebastian Reick1, Alexander Thobe1,2, Artur Widera1, and Dieter Meschede1 — 1Institut für Angewandte Physik, Universität Bonn — 2Institut für Laser-Physik, Universität Hamburg
In our experiment we transport a predetermined small number of cold caesium atoms into a high-finesse optical resonator using an optical dipole trap [1]. By monitoring the transmission of a probe laser beam resonant with the cavity we measure the atomic spin state: A single atom in the strongly coupled state shifts the cavity out of resonance with the laser and strongly reduces its transmission, while an atom in the uncoupled state does not change the transmission. Continuous observation reveals quantum jumps between the two hyperfine ground states [2]. The spin dynamics of one and two atoms is inferred from these random telegraph signals using Bayesian analysis and optimal binning time, yielding maximum information about the system.
[1] M. Khudaverdyan et al., New J. Phys. 10, 073023 (2008)
[2] M. Khudaverdyan et al., Phys. Rev. Lett. 103, 123006 (2009)