Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 1: Mikromechanische Oszillatoren

Q 1.3: Vortrag

Montag, 2. März 2009, 11:15–11:30, ESA-A

Coupling of laser-cooled atoms to a mechanical resonator via an optical lattice — •Stephan Camerer¹, David Hunger¹, Margareta Wallquist², Claudiu Genes², Klemens Hammerer², Peter Zoller², Theodor W. Hänsch¹, and Philipp Treutlein¹ — ¹MPQ Garching und LMU München — ²Universität Innsbruck, Österreich

We investigate ultracold atoms in a 1D optical lattice that is formed by a laser beam retroreflected from a mechanical resonator. The optical lattice serves as a transfer rod which couples vibrations of the cantilever to the atoms and vice versa. As the mechanical resonator oscillates, the center of mass mode of the atoms in the lattice is excited. By applying laser cooling to the atoms, the motion of the mechanical resonator can be sympathetically cooled. We present theoretical investigations of this system and the current status of our experiment.

In combination with cryogenic precooling our system can provide ground state cooling of a single mode of the mechanical resonator. In this limit, the system is an example of a hybrid quantum system. A hybrid quantum system is composed of individual quantum subsystems which are coupled in the sense that information is transferred in both directions. Our system would provide a coherent link between the mechanical motion of ultracold atomic gases and the motion of a massive solid-state object.