# Hannover 2010 – wissenschaftliches Programm

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# A: Fachverband Atomphysik

## A 9: Ultra-Cold Atoms, Ions and BEC II (with Q)

### A 9.6: Vortrag

### Mittwoch, 10. März 2010, 11:45–12:00, F 303

**An AC electric trap suitable for ground-state CO molecules** — •Amudha Kumari Duraisamy, Adela Marian, Wieland Schöllkopf, and Gerard Meijer — Fritz-Haber-Institut, Faradayweg 4-6, Berlin, Germany

When trapping polarizable neutral particles using AC electric fields, the parameter which determines the strength of the interaction is α/*m*, where α is the (total) quadratic Stark coefficient and *m* is the mass of the particle. As this ratio is nearly identical for ^{87}Rb and ^{12}CO in their ground states, they would behave very similarly when confined in an AC electric trap. We have already demonstrated and studied trapping of ground-state Rb in a macroscopic AC electric trap with a depth of a few microkelvins [1, 2] . We now propose to use the Rb atoms as a case study for the behaviour of AC-trapped ground-state CO molecules.

To this end, we have implemented a new AC trap where all the dimensions were scaled down by a factor of two to increase the available trap depth. Stable electric trapping is observed in a wider range of switching frequencies around 300 Hz, in agreement with trajectory calculations. We have trapped about 1.3 × 10^{5} atoms with densities of 8 × 10^{9} cm^{−3} for an electric field of 60 kV/cm at the center of the trap.

Refrences

1. S. Schlunk et al., PRL **98**, 223002 (2007),

2. S. Schlunk et al., PRA **77**, 043408 (2008)