Düsseldorf 2007 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 1: Quantengase (gemeinsam mit A)
Q 1.9: Talk
Monday, March 19, 2007, 12:30–12:45, 6J
Coupling a Bose-Einstein condensate to a nanomechanical resonator — •Stephan Camerer1, David Hunger1, Daniel König3, Jörg Kotthaus3, Theodor Hänsch1, Jakob Reichel2, and Philipp Treutlein1 — 1MPQ und LMU München, Deutschland — 2LKB, ENS Paris, France — 3LMU München, Deutschland
The experimental fusion between quantum optics and solid-state physics is a rapidly developing and auspicious field of research. Due to the capability to control atom clouds near surfaces, atom chips are particularly well suited to provide an experimental interface between a quantum optical and a condensed matter system.
Our experiment aims at studying the interaction between small Bose-Einstein condensates (BECs) and a nanomechanical resonator on an atom chip. The coupling is mediated by a single domain magnetic island located on the resonator tip. The oscillation of the thermally driven resonator is transduced by the magnetic island into an oscillating magnetic field at the location of the BEC. On resonance, the field oscillations cause spin-flip transitions of the trapped atoms: the BEC serves as quantum probe for the mechanical motion of the resonator. For high mechanical quality factors, coherent interactions between the BEC and the resonator can be studied.
The core of our experiment is a chip which combines gold wires for a magnetic trap, free-standing nanomechanical structures and single-domain ferromagnets. It is fabricated using various lithographic, deposition and etching techniques. In the talk, the current status of the experiment is reported.