Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 11: Poster: Quantum Optics and Photonics I

Q 11.8: Poster

Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof

Influence of particle distinguishability on coherence phenomena in optical lattices — •Tobias Brünner, Gabriel Dufour, Alberto Rodriguez, and Andreas Buchleitner — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Strasse 3, D-79104 Freiburg, Deutschland

Cold, interacting atoms in tilted optical lattices exhibit coherent dynamics, for instance Bloch oscillations in position and momentum space. The influence of interactions between the particles was studied and can generally be associated with a suppression of the coherence phenomena. However, the role of the particle-indistinguishability on this dynamics has not been investigated systematically yet. From many-photon interference experiments we know that the degree of distinguishability has a non-trivial influence on the evolution of the underlying many-particle state, and manifests itself in the outcomes of coincidence measurements. In a similar fashion, we want to identify how and where the indistinguishability can be observed in the dynamics of cold, interacting atoms in tilted optical lattices. As our first step, we compare the spectrum of a Bose-Hubbard Hamiltonian for identical atoms with that of a Hamiltonian describing two distinguishable species. Tuning the degree of distinguishability between the two species allows for an assessment of the `quantum-to-classical' transition, i.e. the transition from identical bosons to distinguishable particles.